| About this Abstract |
| Meeting |
2010 TMS Annual Meeting & Exhibition
|
| Symposium
|
2010 Functional and Structural Nanomaterials: Fabrication, Properties, Applications and Implications
|
| Presentation Title |
Tunneling Spectroscopy of colloidal Nanoparticles |
| Author(s) |
Ramkumar Subramanian, Pradeep Bhadrachalam, Seong Jin Koh |
| On-Site Speaker (Planned) |
Ramkumar Subramanian |
| Abstract Scope |
For practical applications of nanoparticles such as in nanoelectronics, photonics, and bio-medicine, knowledge of their electronic structure plays a critical role. We demonstrate a new solid-state tunneling spectroscopic technique for individual nanoparticles that not only enables direct probing of the energy levels of a single nanoparticle, but many such measurement units can be fabricated in a single-batch process. Resonant tunneling between the vertically separated electrodes and the nanoparticle placed between these electrodes forms the basis of spectroscopic measurements. Spectroscopic units with ≈ 7 nm CdSe nanoparticles were used as a model system. Current-voltage measurements for these units yielded the energy level spacings and the band gap by numerical differentiation of the I-V plots. These will be compared with measurements using the lock-in method that directly measures differential conductance. |
| Proceedings Inclusion? |
Undecided |