Events

Seminar on Recent Progress of Low-dimensional Nanomaterials

Date: 27 Feb 2013 - 27 Feb 2013

Venue: SIMTech Auditorium, Tower Block, Level 3

Introduction
This seminar aims to provide participants with a deeper understanding of the trends and progress of nanomaterials, while establishing network with others in the research and industry communities.

Programme
1.30pm      Registration

1.45pm      Developing Active Nanostructures by Associate Professor Chen
                 Hongyu, NTU, School of Physical & Mathematical Sciences

2.30pm      Graphene-based Nanomaterials: Synthesis, Modification and
                 Property Investigation by Dr Qi Xiaoying, SIMTech, Joining
                 Technology Group

3.15pm      Tea Break 

3.35pm      Synthesis and Applications of Low-Dimensional Nanomaterials
                 by Associate Professor Zhang Hua, NTU, School of Materials
                 Science & Engineering

4.20pm      Synthesis, Characterisation and Application of MoS2 Atomic
                 Layers by Associate Professor Lou Jun, Department of Mechanical
                 Engineering & Materials Science, Rice University, Houston, USA

5.05pm      SIMTech Lab Tour

5.30pm      End

For more details, please click here.

Synopses
Developing Active Nanostructures

Presenter: Dr Chen Hongyu, Division of Chemistry and Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University

In this talk, Dr Chen will discuss the recent progress on active nanostructures pertinent to colloid nanostructures that can undergo predictable conformational changes in solution. Our aim is to induce motions that are not passive and not random. Colloidal gold nanowires are controllably compressed into rings as a result of the contraction of their polymer shells. The mechanical energy stored in this process can be released upon removal or swelling of the polymer shells. With some modification of the methods,  bundles of carbon nanotubes can also be coiled into ring structures by controlling the contraction of their polymer shells. With the robust carbon nanotubes, the rings can be reversibly expanded and compressed, making them functionally similar to mechanical springs. Most recently, ultrathin nanowires made of Au-Ag alloy can wind around themselves to form double helices upon growth of an additional metal layer. The mechanisms of these systems will be discussed in detail.

Synthesis and Applications of Low-Dimensional Nanomaterials
Presenter: Dr Zhang Hua, School of Materials Science and Engineering, Nanyang Technological University

In this talk, Dr Zhang will summarise the recent research on synthesis, characterisation and applications of low-dimensional nanomaterials in my group. The synthesis and characterisation of novel low-dimensional nanomaterials will be presented, including 2D graphene-based composites including the first-time synthesised hexagonal-close packed (hcp) Au nanostructures on graphene oxide and the epitaxial growth of Pd, Pt and Ag nanostructures on solution-processable MoS2 nanoshees at ambient conditions, single- or few-layer metal dichalcogenides nanosheets, and large-amount, uniform, ultrathin metal sulfide nanocrystals. This presentation encompasses the  applications of these novel nanomaterials in chemical and bio-sensors, solar cells, water splitting, electric devices, memory devices, conductive electrodes.

Synthesis, Characterisation and Application of MoS2 Atomic Layers
Presenter: Dr Jun Lou, Department of Mechanical Engineering & Materials Science, Rice University, Houston, Texas 77005, USA

Monolayer Molybdenum disulfide (MoS2), a two-dimensional crystal with a direct bandgap, is a promising candidate for 2D nanoelectronic devices complementing graphene. _ENREF_20_ENREF_17Unlike conductive graphene and insulating h-BN, atomic layered MoS2 is a semiconductor material with a direct bandgap, offering possibilities of fabricating high performance devices with low power consumption in a more straight-forward manner.

This presentation will feature the recent efforts on the large area growth of MoS2 atomic layers by a scalable chemical vapor deposition (CVD) method. The as-prepared samples can either be readily utilised for further device fabrication or be easily released from the growth substrateand transferred to arbitrary substrates. High resolution transmission electron microscopy and Raman spectroscopy on the as grown films of MoS2 indicate that the number of layers range from single layer to a few layers. Our results on the direct growth of MoS2 layers on dielectric leading to facile device fabrication possibilities show the expanding set of useful 2D atomic layers, on the heels of graphene, which can be controllably synthesised and manipulated for many applications.

Graphene-based Nanomaterials: Synthesis, Modification and Property Investigation
Presenter: Dr Xiaoying QI, Scientist, SIMTech 

Graphene, a single-atom-thick sheet with two-dimensional carbon structure, is now under intensive investigation because of its intriguing mechanical, thermal, optical, and electrical properties. The pristine graphene sheet is highly hydrophobic, and thus cannot be dissolved in most of the solvents. However, investigations and applications of this material not only demand preserved the properties, but also require its easy incorporation and homogeneous distribution into desired matrices. In this talk, solution-processible graphene-based nanomaterials, including graphene-organic molecular nanocomposite, grapheme-organic macromolecular nanocomposite, and graphene-inorganic nanocomposite will be introduced. The physicochemical properties of these graphene-based single- and multi-components were evaluated, revealing significant improvement in the optical, mechanical and electrical properties for graphene-organic molecular, graphene-organic macromolecular, and graphene-inorganic composite respectively.

Who Should Attend
R&D managers, engineers, researchers, academic staff and students.

Registration
Registration for the seminar is free of charge. Seats are available on a first-come, first-served basis. To reserve a place, please register online.

Contact Us 
For technical enquiries: please contact Dr Sharon Nai, Scientist, Joining Technology Group, Email: mlnai@SIMTech.a-star.edu.sg; Tel: 67938976   

For general enquiries: please contact Alice, Email: kohth@scei.a-star.edu.sg; Tel: 67938249; 67938383