Synthesis and applications of size selected metal, alloy and core-shell nanoparticles
Event details
| Date | 13.07.2015 |
| Hour | 15:00 |
| Speaker | Prof. Bodh Mehta, Indian Institue of Technology Delhi |
| Location | |
| Category | Conferences - Seminars |
For realizing the size dependent properties of nanoparticles, synthesis of nanoparticle having controllable size and narrow size distribution is one of the important prerequisites.
In this talk, synthesis and applications of size selected nanoparticles prepared by an integrated nanoparticle synthesis technique will be described. The synthesis set up has been developed by an integration a gas phase synthesis with the nanoparticle size measurement instrumentation. It comprises of a spark generator for forming metal agglomerates, a radioactive charger for charging, differential mobility analyzer for selecting the size and in-flight sintering for converting the agglomerates to compact, crystalline and spherical nano particles. It is possible to measure average size and number concentration on-line at different stages of nanoparticle growth. The integrated gas phase deposition method has been used to grow Pd, Cu, Ag, Pd-Cu, Pd-Ag and Si-Sn alloy nanoparticles.
A novel modification in the synthesis set up has been carried out for growing metal-graphene core-shell nanoparticles. Depending upon the solid solubility of carbon in the metal and relative surface energy values, thickness and nature of the graphene shell can be controlled. Utilizing the ability of controlling the nanoparticle size and composition, the effect of alloying on the Pd 4d valence band position and thus Pd-H interactions has been investigated in Pd alloy nanoparticles. Optical and electronic properties of CdSe and Si-Sn nanoparticles dispersed in thin film matrix are being investigated for new generation solar cell devices.
Bio: Bodh Raj Mehta is currently Professor of Physics and Schlumberger Chair Professor of Semiconductor Physics at Indian Institute of Technology Delhi, New Delhi, India. He did his M.Sc. in Physics from Punjabi University Patiala, M. Tech in Solid State Materials and Ph. D in Physics from IIT Delhi. He has worked as post-doctoral fellow at University of British Columbia, Canada; guest scientist at University of Saarbrucken, Germany; and guest professor at University of Duisburg, Germany. His major research interests are; Science and Technology of Thin Films and Nanostructured Materials for Solar Cell, Resistive Memory, Thermoelectric and Gas Sensor Devices. He is the recipient of MRSI Medal (Material Research Society of India, 2002), DAAD Fellowship (Deutscher Akademischer Austausch Dienst, 2000) and Marie Curie International Fellowship (European Commission, 2006). He is on the Editorial Board of Journal of Nanoscience and Nanotechnology and has about 160 journal publications. He is the Coordinator of the ‘Unit on Nanoscience’ (Nanomission) at IIT Delhi; Co-coordinator of Nano Research Facility at IIT Delhi. One of his projects ‘NanoSwitch’ has been selected by European Commission as a ‘Success Story’ project.
In this talk, synthesis and applications of size selected nanoparticles prepared by an integrated nanoparticle synthesis technique will be described. The synthesis set up has been developed by an integration a gas phase synthesis with the nanoparticle size measurement instrumentation. It comprises of a spark generator for forming metal agglomerates, a radioactive charger for charging, differential mobility analyzer for selecting the size and in-flight sintering for converting the agglomerates to compact, crystalline and spherical nano particles. It is possible to measure average size and number concentration on-line at different stages of nanoparticle growth. The integrated gas phase deposition method has been used to grow Pd, Cu, Ag, Pd-Cu, Pd-Ag and Si-Sn alloy nanoparticles.
A novel modification in the synthesis set up has been carried out for growing metal-graphene core-shell nanoparticles. Depending upon the solid solubility of carbon in the metal and relative surface energy values, thickness and nature of the graphene shell can be controlled. Utilizing the ability of controlling the nanoparticle size and composition, the effect of alloying on the Pd 4d valence band position and thus Pd-H interactions has been investigated in Pd alloy nanoparticles. Optical and electronic properties of CdSe and Si-Sn nanoparticles dispersed in thin film matrix are being investigated for new generation solar cell devices.
Bio: Bodh Raj Mehta is currently Professor of Physics and Schlumberger Chair Professor of Semiconductor Physics at Indian Institute of Technology Delhi, New Delhi, India. He did his M.Sc. in Physics from Punjabi University Patiala, M. Tech in Solid State Materials and Ph. D in Physics from IIT Delhi. He has worked as post-doctoral fellow at University of British Columbia, Canada; guest scientist at University of Saarbrucken, Germany; and guest professor at University of Duisburg, Germany. His major research interests are; Science and Technology of Thin Films and Nanostructured Materials for Solar Cell, Resistive Memory, Thermoelectric and Gas Sensor Devices. He is the recipient of MRSI Medal (Material Research Society of India, 2002), DAAD Fellowship (Deutscher Akademischer Austausch Dienst, 2000) and Marie Curie International Fellowship (European Commission, 2006). He is on the Editorial Board of Journal of Nanoscience and Nanotechnology and has about 160 journal publications. He is the Coordinator of the ‘Unit on Nanoscience’ (Nanomission) at IIT Delhi; Co-coordinator of Nano Research Facility at IIT Delhi. One of his projects ‘NanoSwitch’ has been selected by European Commission as a ‘Success Story’ project.
Practical information
- General public
- Free
Organizer
- Prof. Juergen Brugger
Contact
- Schafer Isabelle <[email protected]>