DATE: Wednesday, October 25, 2017
TIME: 04:15 PM - 05:15 PM
LOCATION:Lecture Hall 1 (2322), Engineering and Science Hall (Building 9)
Abstract: Reservoir monitoring by seismic imaging usually relies on comparing Earth models or sections acquired at time intervals of several years. In most cases, the quantities being compared are the reflection strength, P and S velocity, and more rarely attributes derived from AVO analysis. In this presentation, a new approach is presented based on time-lapse estimations of the Q factor. This method establishes a hybrid link between macro-models obtained by Q tomography and micro-models derived from the instantaneous frequency. The combination of these two ingredients allows broadening the spectrum of the estimated Q-factor images of the Earth.
The proposed method is not a full-waveform inversion algorithm by itself, but provides a good initial model for the Q-factor inversion. This contribution may be quite important, to reduce the cross-talk between different rock parameters in a subsequent actual full-waveform inversion. The practical value of such an estimate for the oil and gas industry is significant, as anomalies in the absorption of elastic waves are often related to saturating fluids and fractures: locating changes of these properties in a reservoir due to production is very relevant for petroleum engineers.
Bio: Aldo Vesnaver received an MS in physics and a PhD in geophysics from the University of Trieste (Italy). For over 20 years, he worked at OGS (Italian National Institute of Oceanography and Experimental Geophysics). From 2001 to 2006, he worked at Saudi Aramco in seismic R&D. From 2010 to 2013, he taught as Saudi Aramco Chair Professor at KFUPM University (Saudi Arabia). From 2014 to present, he has been teaching at the Petroleum Institute of Abu Dhabi as KADOC Chair Professor. He is a cofounder and a former President of the Italian EAGE-SEG Section in 2001.
He has been an Associate Editor of the journal Geophysical Prospecting from 2003 to present, and from 2006 to 2008 has been its Editor-in-Chief. In 2010 he was awarded SEG Life Membership. He published over 150 papers in international refereed journals or conference proceedings.
DATE: Thursday, October 26, 2017
TIME: 12:00 AM - 12:00 AM
TIME: 12:00 PM - 01:00 PM
LOCATION:Auditorium (Room 0215) between building 4 & 5
ABSTRACT: Rapid increase in global energy use and growing environmental concerns have prompted the development of clean, sustainable, alternative energy technologies. Electrical energy storage (EES) is critical to efficiently utilize electricity produced from intermittent, renewable sources like solar and wind as well as to electrify the transportation sector. Rechargeable batteries are prime candidates for EES, but widespread adoption requires optimization of cost, cycle life, safety, energy density, power density, and environmental impact, all of which are directly linked to materials challenges. After providing a brief account of the current status of lithium-ion technology, this presentation will focus on the development of new materials, cell chemistry, and cell configurations to overcome the current problems. Particularly, the challenges and approaches of transitioning from the current insertion-compound electrodes in lithium-ion batteries to new conversion-reaction electrodes with multi-electron transfer to increase the energy density and lower the cost will be presented. Specifically, lithium-ion technology based on high-nickel layered oxides as well as post lithium-ion technologies based on sulfur, oxygen, and mediator-ion solid electrolytes will be discussed.
BIOGRAPHY: Arumugam Manthiram is currently the Cockrell Family Regents Chair in Engineering and Director of the Texas Materials Institute and the Materials Science and Engineering Program at the University of Texas at Austin (UT-Austin). He received his Ph.D. degree in chemistry from the Indian Institute of Technology at Madras in 1981. After working as a postdoctoral researcher at the University of Oxford and at UT-Austin, he became a faculty member in the Department of Mechanical Engineering at UT-Austin in 1991. Dr. Manthiram's research is focused on clean energy technologies: rechargeable batteries, fuel cells, supercapacitors, and solar cells. He has authored more than 650 journal articles with 37,000 citations and an h-index of 101. He is the Regional (USA) Editor of Solid State Ionics. He is a Fellow of six professional societies: Materials Research Society, Electrochemical Society, American Ceramic Society, Royal Society of Chemistry, American Association for the Advancement of Science, and World Academy of Materials and Manufacturing Engineering. He received the university-wide (one per year) Outstanding Graduate Teaching Award in 2012, the Battery Division Research Award from the Electrochemical Society in 2014, the Distinguished Alumnus Award of the Indian Institute of Technology Madras in 2015, and the Billy and Claude R. Hocott Distinguished Centennial Engineering Research Award in 2016.
TIME: 04:00 PM - 06:00 PM
LOCATION:Building 4, Level 5, Room 5209
Natural gas is among the most dominant resources to provide
energy supplies and Saudi Arabia ranks among the top 5 producers worldwide.
However, prior to use of methane, natural gas has to be treated to remove other
feed gas components, such as H2O, CO2, H2S, N2 and C2+ hydrocarbons. Most NG
fields in KSA contain about 10 mol% carbon dioxide that has to be reduced to
less than 2 mol% for pipeline delivery.
The conventional unit operations for natural gas
separations, that is, molecular sieves, amine absorption, cryogenic
distillation, and turbo expansion exhibit some disadvantages in terms of
economics, operational flexibility or system footprint. One of the most
attractive alternative is membrane technology in either standalone- or hybrid
system configuration. Currently, the only two membrane materials used in
industrial natural gas applications are cellulose acetate and polyimide, which
have moderate permeability and fairly low selectivity when tested under
realistic industrial conditions. The goal for future research is to develop
unique polymeric membranes, which can at least partially replace conventional
gas processing in future natural gas projects. This will support global
economics and specifically the economy of Saudi Arabia.
Newly developed polymeric materials must meet certain
criteria to be used on a commercial scale. These criteria include: (i) high
permeability and selectivity, (ii) processability into thin films, (iii)
mechanical and thermal stability, and (iv) chemical stability against feed gas
components. This project focused on the
removal of carbon dioxide from natural gas by developing and characterizing
functionalized aromatic polyimide membrane materials that exhibit very high
selectivity under aggressive mixed-gas conditions. 6FDA-DAR demonstrated a
mixed-gas CO2/CH4 selectivity of 78 at a CO2 partial pressure of 10 bar with no
pronounced indication of plasticization. Combining hydroxyl- and carboxyl
groups in a miscible polyimide blend led to mixed-gas CO2/CH4 selectivity of
100 with no aging and no plasticization effects. This burgeoning membrane
material has very high potential in large-scale natural gas separations with
the best overall performance of any type developed to date.
DATE: Sunday, October 29, 2017
TIME: 03:00 PM - 04:30 PM
LOCATION:Ibn Sina Building (Bldg. 3), Room 5220
ABSTRACT: Power supply in any electronic system is a crucial necessity. Especially so in fully compliant personalized advanced healthcare electronic self-powered systems where we envision seamless integration of sensors and actuators with data management components in a single freeform platform to augment the quality of our healthcare, smart living and sustainable future. However, the status-quo energy storage (battery) options require packaging to protect the indwelling toxic materials against harsh physiological environment and vice versa, compromising its mechanical flexibility, conformability and wearability at the highest electrochemical performance. Therefore, clean and safe energy storage solutions for wearable and implantable electronics are needed to replace the commercially used unsafe lithium-ion batteries.
This dissertation discusses a highly manufacturable integration strategy for a freeform lithium-ion battery towards a genuine mechanically compliant wearable system. We sequentially start with the optimization process for the preparation of all solid-state material comprising a ''Lithium-free'' lithium-ion microbattery with a focus on thinfilm texture optimization of the cathode material. State of the art complementary metal oxide semiconductor technology was used for the thinfilm based battery. Additionally, this thesis reports successful development of a transfer-less scheme for a flexible battery with small footprint and free form factor in a high yield production process. The reliable process for the flexible lithium-ion battery achieves an enhanced energy density by three orders of magnitude compared to the available rigid ones.
Interconnection and bonding procedures of the developed batteries are discussed for a reliable back end of line process flexible, stretchable and stackable modules. Special attention is paid to the advanced bonding, handling and packaging strategies of flexible batteries towards system-level applications.
Finally, this work shows seamless integration of the developed battery module in an effective integration strategy to incorporate them into a complex architecture such as orthodontic domain in the human body. The developed optoelectronic system embedded in a 3D printed smart dental braces for enhanced enamel healthcare protection and overall healthcare cost reduction. These findings complement and provide power solution options in which flexibility of electronics is an added beneficial dimensionality to wearable biomedical and implantable devices.
DATE: Monday, October 30, 2017
LOCATION:Building 9, Room 2325
Dynamic Secondary Ion Mass Spectrometry (D-SIMS) is a very powerful tool for the characterization of solid surfaces. Since it is based on the detection of masses, it allows to identify all elements of the periodic table including isotopes. In addition, being among the most sensitive surface characterization techniques, elemental quantification down to ppb can be achieved. Using a sputtering ion beam, the investigation / quantification of the elemental distribution in depth can be performed with depth resolution in the nm range. Consequently, SIMS is a very useful tool for researchers developing devices dealing with semiconductors, photovoltaics and energy storage technologies among others. Throughout this contribution, I will discuss the SIMS principle and review briefly the instrumentation aspect. The second part will be devoted to several examples obtained in our lab illustrating the information that can be derived from the SIMS data. The in-depth quantification of elements incorporated either as dopant or as high content will be discussed. The presentation will be also focused on the characterization of multilayer devices and the limitation or artifacts that may be occurring during the sputtering process.
My name is Nimer Wehbe. I come from Belgium but I am originally from Lebanon where I was born and have completed my education until obtaining a bachelor in chemistry. After that, I had the opportunity to achieve a kind of few months training within the Lebanese Commission of Atomic Energy where I tackle for the first time analytical techniques such as PIXE, RBS and NRA. The impact of this training was immediate since I was proposed to move to France in order to obtain a Master degree in analytical chemistry which was accomplished in the University of Lyon. During my master, I had to achieve a several months work related to surface sputtering aspect using a kind of home made SIMS instrument. After obtaining the master’s degree in Analytical chemistry I have received a scholarship from Lebanon to start a Ph.D. in the same lab, working thus in the surface characterization field.
I have obtained the Ph.D. in Physics from the University of Lyon in France after which I moved to Belgium where I have joined, first, the University of Louvain and, then, the University of Namur. My professional career was built somehow in Belgium through several years of working and learning various techniques in the surface characterization field. My last research project before joining KAUST was performed in the CRP of Luxembourg bringing another important aspect related to the SIMS instrumentation filed. My background was acquired and improved not only by the experimental work carried out in the laboratory but also through fruitful contact and collaboration with numerous academies and research centers from mainly Europe. The communication, either through conference contribution or paper publishing is another important aspect particularly addressed during my previous career.
I have joined the Imaging and Characterization Core Lab in KAUST after spending more than 13 years in academic and research centers in Europe.
DATE: Wednesday, November 01, 2017
TIME: 12:30 PM - 01:30 PM
LOCATION:Building 2, Level 5, Room 5220
Mixed Matrix Membranes (MMMs) have received worldwide
attention during the last decades. This is due to the fact that the resulting
materials can combine the good processability and low cost of polymer membranes
with the diverse functionality, high performance and thermal properties of the
inorganic fillers. This work explores the fabrication and application of MMMs.
Various fillers and polymers have been combined in this work depending on the
desired application. We focused on the design and fabrication of nanofillers to
impart target functionality to the membrane for water treatment, protective
coating and gas separation.
This thesis is divided into three sections according to the
Water Treatment: This part is divided into three chapters
(2, 3 and 4), two related to the membrane distillation (MD) (chapter 2 and 3)
and one related to the oil spill (chapter 4). Three different nanofillers have
been used: Periodic mesoporous organosilica (PMO), graphene and carbon nanotube
(CNT). Those nanofillers were homogeneously incorporated into polyetherimide
(PEI) electrospun nanofiber membranes. The doped nanoparticle not only improved
the mechanical properties and thermal stability of the pristine fiber but also
enhanced the MD and oil spill performance due to the functionality of those
nanofillers. In these chapters, the antibacterial effect of graphene and the
use the highly porous organosilica nanoparticles, which was further utilized to
load the eugenol antimicrobial agent, showed an enhancement of the
anti-biofouling properties of the membranes as well.
Protective coating: This part includes two chapters 5 and 6
describing the design and the fabrication of a smart antibacterial and
anti-corrosion coating, respectively.
In the first project, we fabricated colloidal
lysozyme-templated gold nanoclusters gating antimicrobial-loaded silica
nanoparticles (MSN-AuNCs@lys) as nano-fillers in poly(ethylene
oxide)/poly(butylene terephthalate) (PEO–PBT) amphiphilic polymer matrix.
MSN-AuNCs@lys dispersed homogeneously within the polymer matrix with no phase
separation and zero NPs leaching. The system was coated on a common
radiographic dental imaging device (PSP plate) that is prone to oral bacteria
contamination. This mixed-matrix coating can successfully sense and inhibit
bacterial contamination via a controlled release mechanism that is only
triggered by bacteria. Interestingly, the quality of the images obtained with
these coated surfaces is the same as uncoated surfaces and thus the safe
application of such smart coatings can be expanded to include other medical
devices without compromising their utility.
In the second project, the coaxial electrospinning approach
has been applied to fabricate smart core-shell nanofiber for controlled release
of anti-corrosion material. Acetal-dextran was used as a pH controlled shell of
the fibers and polyvinyl alcohol (PVA) as a hydrophilic core. Caffeine, as an
anti-corrosion inhibitor was encapsulated in the fiber core to test its
potential application as an anticorrosion coating. The almost negligible
release was noticed at neutral pH. In acidic pH due to corrosion, the fibers
quickly respond by releasing caffeine cargo.
Gas separation: We describe the synthesis and application
of novel ethylene-diamine-based PMO. The gas adsorption properties of these
materials were investigated for CO2, CH4 and N2 gases at different
temperatures. PMO nanoparticles exhibited excellent CO2 uptake and selectivity.
The novel PMO nanoparticles were homogeneously incorporated into
polydimethylsiloxane to fabricate a MMMs thin layer on a porous
polyacrylonitrile support. Our results
prove that our PMOs can be used as nanofillers to enhance the CO2 selectivity
of the PDMS polymer.
Abstract: Continental rifting and ocean basin formation can be observed at the present day in the Red Sea, which is used as the modern analogue for the formation of mid-ocean ridges. Competing theories for how spreading begins - either by quasi-instantaneous formation of a whole spreading segment or by initiation of spreading at multiple discrete "nodes" separated by thinned continental lithosphere - have been put forward based, until recently, on the observations that many seafloor features and geophysical anomalies (gravity, magnetics) along the axis of the Red Sea appeared anomalous compared to ancient and modern examples of ocean basins in other parts of the world. The latest research shows, however, that most of the differences between the Red Sea Rift (RSR) and other (ultra)slow-spreading mid-ocean ridges can be related to its relatively young age and the presence and movement of giant submarine salt flows that blanket large portions of the rift valley. In addition, the geophysical data that was previously used to support the presence of continental crust between the axial basins with outcropping oceanic crust (formerly named “spreading nodes”) can be equally well explained by processes related to the sedimentary blanketing and hydrothermal alteration.
The observed spreading nodes are not separated from one another by tectonic boundaries but rather represent "windows" onto a continuous spreading axis which is locally inundated and masked by massive slumping of sediments or evaporites from the rift flanks. Volcanic and tectonic morphologies are comparable to those observed along slow and ultra-slow spreading ridges elsewhere and regional systematics of volcanic occurrences are related to variations in volcanic activity and mantle heat flow. Melt-salt interaction due to salt flows, that locally cover the active spreading segments, and the absence of large detachment faults as a result of the nearby Afar plume are unique features of the RSR.
The differences and anomalies seen in the Red Sea still may be applicable to all young oceanic rifts, associated with plumes and/or evaporites, which makes the Red Sea a unique but highly relevant type example for the initiation of slow rifting and seafloor spreading and one of the most interesting targets for future ocean research.
Bio: Dr. Nico Augustin is a senior research scientist at the GEOMAR Helmholtz Centre for Ocean Research Kiel, Germany. He received his PhD in geosciences from the University of Kiel in the field of geochemistry and petrology of submarine mantle rocks in the vicinity of hydrothermal activity. During his PostDoc time he performed two-years of scientific excurses in isotope geochemistry of hydrothermal fluids and on the petrology and genesis of submarine authigenic carbonates. With his capability to look at the problems from a different perspective, he was able to develop some new, but controversial ideas. Since 2010 he moved his research focus from geochemistry to bathymetric mapping and geomorphology of mid-ocean ridges. At this time he started his research in the Red Sea Rift and was part of two major research expeditions there. He developed a model that brings the Red Sea Rift, that was geologically thought to be special, back in line with the known mid-ocean ridges worldwide. Even if his main research interest still lies in the Red Sea rift and research there is ongoing, he is further involved in numerous other seagoing expeditions, often working in internationally and interdisciplinary projects together with e.g. biologist, geophysicists and oceanographers. The aim of his current work is to understand volcanology and hydrothermalism in all oceans, but particularly in rift zones, by means of seafloor imaging and morphological analyses combined with information from other disciplines.
DATE: Thursday, November 02, 2017
TIME: 08:30 AM - 11:30 AM
ABSTRACT: Zinc oxide (ZnO)
semiconductors have been utilized by many researchers, due to its unique
properties beneficial for functional devices. In particular, gadolinium (Gd)–doped ZnO exhibits high ferromagnetic and electrical
properties, which is attributed to defect/impurity bands mediated by Gd dopants.
In this dissertation, I study the effects of Gd concentration, oxygen pressure using
pulsed laser deposition (PLD), and thermal annealing on the optical and
structural properties of undoped and Gd-doped ZnO films and nanostructures.
Moreover, as the growth of practical ZnO nanostructures-based devices without
catalyst, while presently challenging, is highly important for many
applications. Thus, for the first time, a novel method is developed for growing well
aligned ZnO nanorods (NRs) by optimizing PLD conditions using Gd-doped ZnO
target without any catalyst in a single step. This study shows
that, both the lattice orientation of the substrate and the Gd characteristics
are significant in enhancing the NR growth. Our findings reveal that precise
control of the NR density can be achieved by changing the oxygen partial
pressure. Furthermore, due to the Gd incorporation, these NRs possess favorable
electrical properties with a significant mobility of 177 cm2 (V.s)-1
compared to that reported in literature. Nonetheless significant challenges
need to be overcome to achieve reproducible and stable p-type ZnO for
commercial applications. Hence, several attempts based on n-type ZnO grown on foreign
p-type substrates were made to achieve high-performance devices and overcome
the issues arising when p-type doped ZnO is employed. Moreover, Growth of ZnO
nanostructures on a foreign p-type substrates does not require a lattice-matched
p-type substrate. Thus, for the first
time, PLD conditions are improved to grow high quality
ZnO nanotubes (NTs) with high optical, structural and electrical properties on
a p-type Si (100) substrate without catalyst for high-performance devices. A
fabrication of high performance UV photodetector (PD) based on ZnO NT/p-Si is
demonstrated with superior responsivity (up to ~ 101.2 AW-1)
compared to that reported in literature. This new and simple method demonstrates that the
PLD system has a significant potential for improving the
performance of materials used in a wide range of electronic and optoelectronic
LOCATION:Auditorium (Room 0215) between Buildings 2 & 3
ABSTRACT: Magnetic skyrmions are topological objects with swirling spin structure that carry topological charge and Berry phase in real space [1-2]. Skyrmions are appealing for application in spintronics as they can be driven by electrical currents with ultralow density. Typically, skyrmions emerge from the Dzyaloshinskii–Moriya interaction (DMI) in a finite magnetic field, at low temperature [1-2]. For practical applications, efforts have been made to extend the phase diagram of stable existence of skyrmions [3-5]. Alternatively, a growing group of artificially designed magnetic superstructures allowing for the existence of skyrmions without the need of a microscopically built-in DMI mechanism, which, however, compromise the mobility of skyrmions [6-8]. Here, we present a novel approach of building on the advantages of both the natural and the artificial skyrmion materials by patterning arrays of magnetic nano-disks on top of thin films with DMI. And we denote the emerging novel material as hybrid magnetic skyrmions (HMS). This type of HMS has a significantly broader domain of existence on the phase diagram without loss of mobility and can suppress the skyrmion Hall effect substantially. We further demonstrate the concept of HMS racetrack memory by creating isolated skyrmions via current pulses and driving them by a continuous current at the speed up to 850 m/s, which is around 2 times of the speed of the skyrmion with DMI only .
Roszler, A. N. Bogdanov and C. Pfleiderer, Nature 442, 797 (2006).X. Z. Yu, Y. Onose, N. Kanazawa, J. H. Park, J. H. Han, Y. Matsui, N. Nagaosa and Y. Tokura, Nature 465, 901 (2010).Y. Tokunaga, X. Z. Yu, J. S. White, H. M. Ronnow, D. Morikawa, Y. Taguchi and Y. Tokura, Nat. Commun. 6, 7638 (2015).W. Jiang, P. Upadhyaya, W. Zhang, G. Yu, M. B. Jungfleisch, F. Y. Fradin, J. E. Pearson, Y. Tserkovnyak, K. L. Wang, O. Heinonen, S. G. E. te Velthuis and A. Hoffmann, Science 349, 283 (2015).S. Woo, K. Litzius, B. Kruger, M.-Y. Im, L. Caretta, K. Richter, M. Mann, A. Krone, R. M. Reeve, M. Weigand, P. Agrawal, I. Lemesh, M.-A. Mawass, P. Fischer, M. Klaui and G. S. D. Beach, Nat. Mater. 15, 501 (2016).L. Sun, R. X. Cao, B. F. Miao, Z. Feng, B. You, D. Wu, W. Zhang, A. Hu and H. F. Ding, Phys. Rev. Lett. 110, 167201 (2013).Y. Y. Dai, H. Wang, P. Tao, T. Yang, W. J. Ren and Z. D. Zhang, Phys. Rev. B 88, 054403 (2013).B. F. Miao, L. Sun, Y. W. Wu, X. D. Tao, X. Xiong, Y. Wen, R. X. Cao, P. Wang, D. Wu, Q. F. Zhan, B. You, J. Du, R. W. Li and H. F. Ding, Phys. Rev. B 90, 174411 (2014).H. Z. Wu, B. F. Miao, L. Sun , D. Wu, and H. F. Ding, 95, 174416 (2017).1991-1995, B. Sc. at Tianjin University, China.1995-1998, M. Sc. at Fudan University, China.1998-2001, Ph. D. at Martin-Luther University, Germany.2002-2005, postdoctor at Argonne National Lab. USA
Since 2006, Full Professor, School of Physics, Nanjing University, China, Principle investigator of Low Dimensional Magnetism group.
Main research interests: Low dimensional magnetism and spintronics.
~70 publications in SCI journals, including 4 PRL, 1 NanoLett., 21 PRB and 14 APL.
International advisory board member: Journal of Magnetism and Magnetic Materials, IEEE Magnetic Letters.
TIME: 02:00 PM - 03:30 PM
LOCATION:Building 3, Level 5, Room 5220
Well-defined silica supported bimetallic catalysts Pt100-x Pdx
(where x is the molar ratio of Pd) are prepared by Surface Organometallic
Chemistry (SOMC) via controlled decomposition of Pd2(allyl)2Cl2 on Pt/SiO2. For
comparison purposes, Pt100-x Pdx bimetallic catalysts is also prepared by
ion-exchange (IE). According to the results of STEM, XAS and H2 chemisorption,
all bimetallic nanoparticles, prepared using neither SOMC nor IE, produce
discrete formation of monometallic species (either Pt or Pd). Most catalysts
exhibit a narrow particle size distribution with an average diameter ranging
from 1 to 3 nm for samples prepared by IE and from 2 to 5 nm for the ones
synthesized by SOMC. For all catalysts investigated in the present work, iso-butane
reaction with hydrogen under differential conditions (conversions below 5%)
leads to the formation of methane and propane (hydrogenolysis), n-butane
(isomerization), and traces of iso-butylene (dehydrogenation).
The total rate
of reaction decreases with increasing the Pd loading for both catalysts series
as a result of decreasing turnover rate (expressed as moles converted per total
surface metal per second) of both isomerization and hydrogenolysis. In the case
of Pt100-x Pdx(SOMC) catalysts, the results suggest a selective coverage of Pt
(100) surface by a Pd layer, followed by a buildup of Pd overcoat onto a Pd
layer assuming that each metal keeps its intrinsic catalytic properties. There
is no mutual electronic charge transfer between the two metals (DFT). For
the PtPd catalysts prepared by IE, the catalytic behavior cannot simply be
explained by a surface coverage of highly active Pt metal by less active Pd
(not observed), suggesting there is a formation of a surface alloy between Pt
and Pd collaborated by EXAFS and DFT. The catalytic results are explained by a
simple structure-activity relationship based on the previously proposed
mechanism of C-H bond and C-C Bond activation and cleavage for iso-butane
hydrogenolysis, isomerization, cracking and dehydrogenation.