News & Events

Speaker: Professor Manish Chhowalla
Affiliation: Materials Science & Metallurgy, University of Cambridge, UK
Abstract Details:

Professor Manish Chhowalla will describe the realization of ultra-clean vdW contacts between 3D metals and single layer MoS2. Using scanning transmission electron microscopy (STEM) imaging, they show that the 3D metal and 2D MoS2 interface is atomically sharp with no detectable chemical interaction, suggesting van-der-Waals-type bonding between the metal and MoS2. They show that the contact resistance of indium electrodes is ~ 800 ?-?m – amongst the lowest observed for metal electrodes on MoS2 and is translated into high performance FETs with mobility in excess of 160 cm2-V-s-1 at room temperature without encapsulation. They also demonstrate low contact resistance of 220 ?-?m on 2D NbS2 and near ideal band offsets, indicative of defect free interfaces, in WS2 and WSe2.


Prof Manish Chhowalla will also describe their efforts on making good p-type contacts on 2D semiconductors.

About the Speaker:

Professor Manish Chhowalla is the Goldsmiths’ Professor of Materials Science at the University of Cambridge. His research interests are in the fundamental studies of atomically thin two-dimensional transition metal dichalcogenides (TMDs). In particular, his group studies the optical and electronic properties of different phases of 2D TMDs. He has demonstrated that it is possible to induce phase transformations in atomically thin materials and utilize phases with disparate properties for field effect transistors, catalysis, and energy storage. Prof Chhowalla is a Fellow of the Materials Research Society, Institute of Physics, the Royal Society of Chemistry and Churchill College. He was the founding Editor in Chief of Applied Materials Today and is now the Associate Editor of ACS Nano. He has been on the Clarivate Highly Cited Researchers since 2016.

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Speaker: Associate Professor Vinicius Rosa
Affiliation: Oral Sciences, Faculty of Dentistry, National University of Singapore
Abstract Details:

The current COVID-19 pandemic and its tremendous health and financial impacts call for a new approach in regards of using advanced materials in the war against microorganisms at the nanoscale. It is a fact that common surfaces are critical routes for contamination as they allow for the survival of viruses, bacteria and fungi. Thus, it is urgent to develop novel touchable materials with antiviral and antibiofilm potential.


In this webinar, Associate Professor Vinicius Rosa will discuss the use of nano-material coatings, such as graphene, in the worldwide fight against our common invisible enemies.

About the Speaker:

Vinicius Rosa is professor of dental biomaterials and faculty at Centre for Advanced 2D Materials and Department of Materials Science (NUS). He develops graphene-based strategies for biomedical purposes including tissue engineering, anti-biofilms, and anti-viral applications.

Vinicius Rosa is also a professor and program coordinator for Dental Materials in the National University of Singapore Faculty of Dentistry since 2012 and has been tenured to Associte Professor in 2019. Rosa also serves as Assistant Vice-Dean for Research (2019 to date) and is a Faculty at NUS Centre for Advanced 2D Materials and NUS Department of Materials Science.

Vinicius Rosa graduated as DDS in 2005 (University of Passo Fundo, Brazil) and completed the MSc (2007 and PhD (2010) in the University of Sao Paulo, Brazil. During the MSc, Rosa has studied the mechanical properties of ceramics and in his PhD he has developed biomaterials that promoted the tissue regeneration of full length pulps with stem cells.

Today, Rosa merges in both materials science and biology to develops atomically thin materials for biomedical applications. His recent works have shown that scaffolds and films made of graphene can enhance the differentiation of stem cells, decrease biofilm formation and enhance integration of implants in vitro and in vivo. His work has been consistently published in high tiered journals for basic, dental and medical sciences. In addition, the Rosa’s group develops strategies to promote dental pulp regeneration and to evaluate the bioactivity of dental materials including the recent differentiation of functional odontoblast from induced pluripotent stem cells.

As contribution for the research society, Rosa serves as an Editorial Board Member of the Journal of Dental Research (2018-2020) and Dental Materials (2020-to date), member of the scientific advisory board of the Journal of Endodontics (2019-to date) and Associate Editor for Journal of Prosthodontics (2019 – to date).

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Speaker: Professor Sir Andre Geim
Affiliation: Condensed Matter Physics, University of Manchester, UK
Abstract Details:

Professor Sir Andre Geim will provide an overview of our recent work using atomic-scale channels fabricated by der Waals assembly of 2D crystals. These ultimately narrow structures can be viewed as if an individual atomic plane were extracted from a bulk crystal leaving behind a 2D empty space, essentially an angstrom-size gap connecting two edge dislocations. Gas, liquid, ion and proton transport have been studied in such slits down to one atom in height, revealing unique, sometimes completely unexpected properties.

About the Speaker:

Sir Andre Geim is Regius Professor and Royal Society Research Professor at The University of Manchester. He has received many international awards and distinctions, including the John Carty Prize from the US National Academy of Sciences and the Copley Medal from the Royal Society. Most notably, he was awarded the 2010 Nobel Prize in Physics for his ground-breaking work on graphene.

Andre Geim was born in Russia in 1958 to German parents and holds dual British and Dutch citizenship. He began his academic career in Moscow, spent several years as a postdoctoral researcher at the universities of Nottingham, Bath and Copenhagen and then moved to the Netherlands as associate professor before coming to Manchester in 2001.

During his career, Andre Geim has published many research papers, of which more than 20 are cited over 1,000 times and 4 are cited over 10,000 times. Two of the latter are now on the list of the 100 most cited research papers in human history. Thomson-Reuters has repeatedly named him among the world’s most active scientists and attributes to him the initiation of three new research fronts – diamagnetic levitation, gecko tape and graphene.

Andre was also awarded the IgNobel prize in 2000 for his work on levitating frogs, becoming the only recipient of both Nobel and IgNobel Prizes. He has received both Dutch and British knighthoods.

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Speaker: Professor Antonio H. Castro Neto
Affiliation: NUS – Centre for Advanced 2D Materials
Abstract Details:

Prof Antonio will discuss how dimensionality plays an important role in the physics and chemistry of materials going from 0D (molecules and atoms), to 1D (conducting polymers, nanowires, nanorods, nanotubes,…), 2D (graphene and others) and 3D (conventional materials).

About the Speaker:

Director of Centre for Advanced 2D Materials (CA2DM);
Distinguished Professor at Department of Materials Science Engineering;
Distinguished Professor at Department of Physics;
Professor at Department of Electrical and Computer Engineering
National University of Singapore.

Prof. Antonio H. Castro Neto got his Ph.D. in Physics at University of Illinois at Urbana-Champaign in 1994. His thesis studied the fundamentals of the theory of metals. In 1994, he moved to the Institute for Theoretical Physics at the University of California at Santa Barbara as a postdoctoral fellow where he dedicated his attention to low dimensional materials. In 1995, he became an Assistant Professor at University of California at Riverside where he wrote fundamental work on the theory of disordered materials. In 2000, he moved to Boston University as Professor of Physics. At Boston, Prof. Castro Neto became one of the leading scientist in the study of graphene and other two dimensional materials. Since 2010, Prof. Castro Neto is the Director of the Graphene Research Centre and in 2014 he became Director of the Centre for Advanced 2D Materials funded by the National Research Foundation of Singapore.

Prof. Castro Neto is a Distinguished Professor in the Department of Material Science Engineering and Physics, he is also Professor at the Department of Electrical and Computer Engineering, at the National University of Singapore. In 2003, Prof. Castro Neto was elected a fellow of the American Physical Society (APS) and in 2011 he was elected a fellow of the American Association for the Advancement of Science (AAAS).

Prof. Castro Neto was awarded the 11th Ross J. Martin Award by the University of Illinois at Urbana-Champaign; the University of California Regent Fellowship; the Alfred P. Sloan Research Fellowship; the visiting Miller Professorship by the University of California, Berkeley; the visiting Gordon Godfrey Professorship by the University of New South Wales, Australia; the Distinguished Visiting Chair Professor at the SKKU Advanced Institute of Nano-Technology (SAINT), South Korea; the Hsun Lee Lecture Award by the Institute of Metal Research at the Chinese Academy of Sciences; and Kramers Professorship at the University of Utrecht, the Netherlands.

In 2016, Prof. Castro Neto founded 2D Materials (2DM) Pte Ltd in Singapore for the development of high quality graphene, in 2017 he founded MADE Advanced Materials Pte Ltd for the development of graphene composites with carbon and glass fibres, in 2108 he founded PHASE Events Pte Ltd with the objective of scientific events in order to educate industry and academia on nano-materials and nano-technology, and in 2019 he founded Graphene Watts Pte Ltd for the development and commercialization of graphene-based Lithium-Sulphur (GLiS) batteries.

Prof. Castro Neto has authored more than 400 manuscripts and has published in prestigious journals including Science, Nature Materials, Nature Physics, and Physical Review Letters, and has over 60,000 citations; H-Index (Google Scholar): 102. Prof. Castro Neto has more than 54 invention disclosures and patents under his name.

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Speaker: Professor Konstantin Novoselov
Affiliation: NUS – Department of Material Science and Engineering
Abstract Details:

Ballistic Hall micromagnetometry is a technique to measure magnetisation of the mesoscopic objects. Since it was introduced in mid-90s, it was successfully used to study collective vortex formation and penetration in mesoscopic superconductors, magnetisation states of microscopic ferromagnets, ferromagnetic domain wall propagation on atomic scale and many other phenomena. Still, the range of applications of this technique was rather limited due to the properties of the two-dimensional electron gas in III-V GaAs/AlGaAs heterostructures used. The advent of graphene, where ballistic transport extends practically to room temperatures, allowed us to revisit this technique and consider its application to study a much broader range of phenomena. Furthermore, as recently 2D ferromagnets became the centre of attention, the van der Waals heterostructures, formed between graphene and 2D ferromagnets, present an ideal system to study magnetic properties of such materials. In my talk I will review the opportunities presented by Ballistic Hall micromagnetometry and will focus on the recent advances in terms of it applications to study 2D ferromagnets.

About the Speaker:

Konstantin Sergeevich Novoselov FRS (Tan Chin Tuan Centennial Professor)


Prof Sir Konstantin ‘Kostya’ Novoselov FRS was born in Russia in August 1974. He has both British and Russian citizenship. He is best known for isolating graphene in 2004, and is an expert in condensed matter physics, mesoscopic physics and nanotechnology. Every year since 2014 Kostya Novoselov is included in the list of the most highly cited researchers in the world. He was awarded the Nobel Prize for Physics in 2010 for his achievements with graphene


He graduated from the Moscow Institute of Physics and Technology, and undertook his PhD studies at the University of Nijmegen in the Netherlands before moving to The University of Manchester in 2001 and then to the National University of Singapore in 2019. Professor Novoselov has published more than 350 peer-reviewed research papers. He was awarded with numerous prizes, including Nicholas Kurti Prize (2007), International Union of Pure and Applied Science Prize (2008), MIT Technology Review young innovator (2008), Europhysics Prize (2008), Bragg Lecture Prize from the Union of Crystallography (2011), the Kohn Award Lecture (2012), Leverhulme Medal from the Royal Society (2013), Onsager medal (2014), Carbon medal (2016), Dalton medal (2016), Otto Warburg Prize (2019) among many others. He was knighted in the 2012 New Year Honours.

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Speaker: Dr Nicholas M Harrison
Affiliation: Director, Institute of Molecular Science and Engineering, Imperial College London, London, UK
Abstract Details: Current electronic devices are the product of a top-down approach involving the miniaturization of their components. We are now entering an era in which the unavoidable limits imposed by quantum mechanics prevent further reductions in scale. The prospect of a bottom-up approach with electronic and spintronic devices assembled from molecular components is an intriguing alternative that is now being very actively explored. This introduces a class of versatile, sustainable and highly processable materials that could facilitate sustainable production of low energy, flexible and efficient devices. Spintronics is however based on the manipulation of electronic spin; there is unfortunately only one known example of a magnetic molecular semiconductor operating at room temperature. In this talk we present an overview of how a combination of theoretical modelling and experimental characterisation has been used to design, synthesise and grow molecular thin films and nanostructures with tuneable magnetic coupling, charge transport and light absorption properties that are approaching the requirements for practical applications. A recent example of a film based on cobalt phthalocyanine reaching 100K and a theoretical prediction of a film with room temperature magnetism will be highlighted.
About the Speaker: Professor Harrison is co-Director of the Institute for Molecular Science and Engineering at Imperial College London. He is the developer of multiple widely used theoretical and computational methods for the discovery and optimisation of advanced materials. His contributions include the introduction of hybrid exchange methods to solid state physics and chemistry, the computational discovery of the hardest known oxide, advances in first principles thermodynamics and the discovery of near room temperature organic ferromagnets. He has been the Professor of Computational Materials Science at Imperial College since 2000, is a Fellow of the Institute of Physics and of the Royal Society of Chemistry.
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Speaker: Dr Alexey Berdyugin
Affiliation: University of Manchester
Abstract Details: In my talk, I will report our recent results on twisted bilayer graphene. First, I will focus on a regime when the twist angle is higher than the magic angle. The high quality of our samples allowed us to measure the transverse magnetic focusing effect and utilize it study the miniband structure of this metal. The interlayer displacement field enabled us to lift the minivalley degeneracy and observe a minivalley polarized magnetic focusing. Next, I will cover the regime with the twist angle much smaller than the magic. At very small twist angles of ~0.1 degree twisted bilayer graphene exhibits strain-accompanied lattice reconstruction that results in submicron-size triangular domains with standard, Bernal stacking. If the interlayer bias is applied to open an energy gap inside the domain regions making them insulating, such marginally twisted bilayer graphene is expected to remain conductive due to a triangular network of chiral one-dimensional states hosted by domain boundaries. In our work, we study electron transport through this network and report giant Aharonov-Bohm oscillations which persist up to 100K. At low temperature, we observe narrow minibands formed by the network of one-dimensional states inside the gap.
About the Speaker: Alexey Berdyugin was born in 1993 in a small-town V-Pyshma (Russia) which locates on a border between Europe and Asia. He got his master’s degree at Moscow Institute of Physics and Technology during which he studied energy relaxation of electron system in graphene. He joined the University of Manchester Condensed Matter Physics group in 2016. His current research interest stays within the transport properties of the novel van der Waals materials. First of all, he studies hydrodynamic current propagation regime in a presence of the magnetic field in graphene/hBN heterostructures and control over electron-electron interaction via proximity gating. Also, he is interested in several kinds of graphene superlattices such as twisted bilayer graphene and aligned graphene/hBN, where he studies the miniband structure of those materials, Hofstadter butterfly physics, and lattice reconstruction effects.
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Speaker: Assistant Prof Maciej Koperski
Affiliation: NUS (Department of Materials Science and Engineering)
Abstract Details:  Luminescent defect centres in wide gap materials are known to play a crucial role in breakthrough developments in science and technology. Especially prominent examples of that notion may be found in photonic research. One of the first observations of population inversion, subsequently leading to creation of lasers, was possible through inspection of intrinsic transitions in Cr3+ ions acting as substitution for Al in Al2O3 crystals [1]. The efforts to fabricate and characterize nitrogen-vacancy defects in diamond inspired substantial progress in solid-state single photon emission [2] and sensing of local fields [3].

Even though undeniably important, well-controlled defect centres are rare and generally difficult to achieve. In this talk, I will present a road from uncovering emitting defect centres in hexagonal boron nitride (hBN) [4,5] of microscopically unknown origin to designing methods of intentional creation of stable carbon-related defects. Those new carbon-doped hBN specimen display a particular pattern of resonances seen in photoluminescence spectra under below-band-gap excitation. The optical response of carbon-doped hBN crystals, related to the physical character of the emitting states and radiative/non-radiative processes, is similar to other aforementioned emitting defects in solids. The strength of such findings comes from the omnipresence of hBN in the research of 2D materials, proving its compatibility with robust van der Waals technology. This opens up a path to obtain more intricate insight into the defect physics and introduce application-oriented developments in material science via methods applicable exclusively to 2D crystals.

References [1] T. H. Maiman, Stimulated optical radiation in ruby. Nature 187, 493-494 (1960). [2] R. Brouri, et al., Photon antibunching in the fluorescence of individual color centers in diamond. Opt. Lett. 25, 1294-1296 (2000). [3] R. Schirhagl, et al., Nitrogen-vacancy centers in diamond: nanoscale sensors for physics and biology. Annual Review of Physical Chemistry 65, 83-105 (2014). [4] T. T. Tran, et al., Quantum emission from hexagonal boron nitride monolayers. Nat. Nanotechnol. 11, 37 (2016). [5] M. Koperski, et al., Single photon emitters in boron nitride: More than a supplementary material. Opt. Commun. 411, 158-165 (2018).
About the Speaker: Dr. Maciej Koperski joined the Department of Materials Science and Engineering as an Assistant Professor in November 2019. He was born in 1988 in Slawno (Poland), a small town 30 km away from the south coast of the Baltic Sea. For the past two years, he was holding a post-doctoral position at the University of Manchester (UK) in the Condensed Matter Physics Group. After defending PhD dissertation on optical properties of transition metal dichalcogenides in High Magnetic Field Laboratory in Grenoble (France) in 2017, he shifted his research focus on explorations of novel phenomena related to magnetism in 2D, uncovering electronic properties of less understood materials (e. g., InSe) by combining optical and electrical investigations and devising novel methods of introducing light into other areas of low dimensional physics (optical detection of fluids/molecules in 2D channels/environments). The scientific interests of dr. Koperski currently gravitate towards excitonic physics in confined systems and properties of defect-related light emitting centres in solids.
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Speaker: Dr Noah F. Q. Yuan
Affiliation: Massachusetts Institute of Technology
Abstract Details:

A moiré superlattice is formed by two similar lattices but with small lattice mismatch. Recently, exciting experimental results are reported in moiré superlattices of graphene and transition metal dichalcogenide (TMD). In this talk, I would like to discuss our theoretical understanding of such moiré systems. The take-home message is that, compared with atomic lattices, moiré superlattices can be regarded as rescaled solids with similar “chemistry”, but tunable band structure and interaction strength on the energy scale of 10~100 meV. The interplay between such “moiré chemistry” and Coulomb interactions lead to various correlated phases, which may help us to understand graphene [1, 2, 3] and TMD superlattices [4]. If I have time, weak coupling approach in momentum space considering the so-called high-order van Hove singularity [5, 6] will also be discussed.
[1] N. F. Q. Yuan and L. Fu, Phys. Rev. B 98, 045103 (2018).
[2] M. Koshino, N. F. Q. Yuan, T. Koretsune, M. Ochi, K. Kuroki, and L. Fu, Phys. Rev. X 8, 031087 (2018).
[3] H. Isobe, N. F. Q. Yuan, and L. Fu, Phys. Rev. X 8, 041041 (2018).
[4] Yang Zhang*, Noah F. Q. Yuan*, and Liang Fu, arXiv: 1910.14061 (2019).
[5] Noah F. Q. Yuan, Hiroki Isobe, Liang Fu, arXiv:1901.05432 (2019), to appear on Nature Communications.
[6] Noah F. Q. Yuan, Liang Fu, arXiv:1910.10179 (2019).

About the Speaker:

Dr. Yuan is a postdoc in MIT. Since the exciting experiment discovery in twisted bilayer graphene, he has achieved several important theoretical results in this field, including the effective tight-binding model and concept of high order Van Hove singularity. Before joining MIT, he got his Ph.D in HKUST, where he studied topological superconductivity in TMD materials.

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Speaker: Prof Ralph Müller
Affiliation: Department of Health Sciences and Technology, Laboratory for Bone Biomechanics ETH Zu?rich, Switzerland
Abstract Details: Professor Müller's research employs state-of-the-art biomechanical testing and simulation techniques as well as novel bioimaging and visualization strategies for musculoskeletal tissues. The study of Bone Biomechanics aims at providing a bridge between biologists, who have brought molecular and cellular components within the realm of engineering, and engineers, who have brought the methods of measurement, analysis, synthesis, and control within the realm of molecular and cell biology. More specifically, new developments in biomechanical research are aimed at the quantification and modelling of bone at the molecular, cellular, and organ-level incorporating novel principles and techniques of mechanics, imaging, and in silico modelling applied to the areas of tissue engineering and repair, systems mechanobiology and personalized medicine. Today, these techniques are successfully employed for the quantitative assessment and monitoring of structure-function relationships in tissue regeneration, growth and adaptation.
About the Speaker: Dr. Mu?ller is a Professor of Biomechanics at the Department of Health Sciences and Technology and heads the Laboratory for Bone Biomechanics at ETH Zu?rich in Switzerland. He studied electrical engineering at ETH Zu?rich, where he also received his doctoral degree in 1994. In 1996, he moved to Boston where he served as a tenure-track Assistant Professor of Orthopedic Surgery at Harvard Medical School and the Associate Director of the Orthopedic Biomechanics Laboratory. Between 2000 and 2011, he was first an SNF Professor of Bioengineering at the Department of Information Technology and Electrical Engineering and then Associate and Full Professor of Biomechanics at the Department of Mechanical and Process Engineering at ETH Zu?rich. Dr. Mu?ller is an author of 321 refereed original journal and 226 proceeding articles, 80 chapters and reviews, 2 books and monographs, and 646 peer-reviewed abstracts. His work has been cited over 31,000 times on Google Scholar with an h-index of 91. In 2008, he co-founded two MedTech spin-off companies, Pearltec AG, developing and marketing novel patient positioning systems for medical imaging procedures using patented technology from ETH Zu?rich, and b-cube AG, now a subsidiary of Scanco Medical.
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