September 22, 2014 UMD Home FabLab NispLab NanoOptics Lab


Louis E. Brus

Louis E. Brus

 

Louis E. Brus, a professor at Columbia University in New York and the winner of the first Kavli prize in Nanoscience, will speak at the University of Maryland on February 1, 2013, at 3 pm.

Prof. Brus' research spans multiple frontiers of the physical chemistry of materials. He is best known for his work on quantum dots, which straddle the physical line between semiconductors and molecules. This unique substance can be used in applications such as transistors, solar cells, LEDs, and diode lasers; as agents for medical imaging; and possibly as qubits in quantum computing.

The presentation is the first NanoColloquium of 2013 from the Maryland NanoCenter, and is also a part of the Distinguished Speaker Seminar Series presented by the College of Mathematical and Natural Science’s Department of Chemistry and Biochemistry.

The session will be held in the Marker Seminar Room of the Chemistry Building (Room 0112) from 3:00-4:00pm.  Light refreshments will be served at 2:30pm.

 

Abstract by Dr. Brus: Carbon Nanoscience and Electronic Structure

We explore the fundamental nature and dynamics of electrons in graphitic carbon materials.  In semiconducting carbon nanotubes, near-infrared two photon luminescence excitation spectra quantitatively reveal very-strongly-bound exciton excited states.  Electron-electron interactions are compared among CdSe nanocrystals, graphene, and carbon nanotubes.  The independent contributions of screening and dimensionality are analyzed.  Electronic and vibrational degrees of freedom are significantly coupled in graphene.  The metallic versus molecular nature of single sheet graphene is strongly affected by charge transfer doping by adsorbed molecular species.   Asymmetric doping in bilayer graphene can open a band gap, as revealed by the Raman spectra. Optical absorption bleaching and Raman Fano lineshapes are observed in few layer graphenes very highly doped by adsorbed alkalis.

 

--end--



Related Articles:
NanoCenter Members Organize Chemistry Meeting


«Previous Story  

 

 

Current Headlines

Li and Hu Awarded NSF Grant to Study Challenges in Creating Materials that are Both Stronger and Tougher

Nanoparticles Add Zest to Search for Drug Delivery Methods

Atomic Layer Depostion and Graphene Inspire Creative Catalyst Design

New UMD Synthesis Method May Shape Future of Nanostructures, Clean Energy

A Small Gift to Dr. Loh Makes a Big Hit

Beyond “Six Nines”: Ultra-enriched Silicon for Quantum Computing

DOE Invests in UMERC Battery Research

Students Use UMD Supercomputer to Design, Test Materials

UMERC's Advanced Energy Storage Technology Selected by NASA

Lithium-ion battery research profiled in DOE newsletter

 

Colleges A. James Clark School of Engineering
The College of Computer, Mathematical, and Natural Sciences

Communicate Contact Us
Contact the Webmaster
Follow us on TwitterTwitter logo

Links Privacy Policy
Sitemap
RSS

Copyright The University of Maryland University of Maryland
2004-2014