Accession Number : ADA588727


Title :   Large Scale Solution Assembly of Quantum Dot - Gold Nanorod Architectures with Plasmon Enhanced Fluorescence (Postprint)


Descriptive Note : Interim rept. 2 Jan 2012-12 Jul 2013


Corporate Author : AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE


Personal Author(s) : Nepal, Dhriti ; Drummy, Lawrence F ; Biswas, Sushmita ; Park, Kyoungweon ; Vaia, Richard A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a588727.pdf


Report Date : Sep 2013


Pagination or Media Count : 14


Abstract : Tailoring the efficiency of fluorescent emission via plasmon - exciton coupling requires structure control on a nanometer length scale using a high-yield fabrication route not achievable with current lithographic techniques. These systems can be fabricated using a bottom-up approach if problems of colloidal stability and low yield can be addressed. We report progress on this pathway with the assembly of quantum dots (emitter) on gold nanorods (plasmonic units) with precisely controlled spacing, quantum dot/nanorod ratio, and long-term colloidal stability, which enables the purification and encapsulation of the assembled architecture in a protective silica shell. Overall, such controllability with nanometer precision allows one to synthesize stable, complex architectures at large volume in a rational and controllable manner. The assembled architectures demonstrate photoluminescent enhancement (5x) useful for applications ranging from biological sensing to advanced optical communication.


Descriptors :   *FLUORESCENCE , *GOLD , *PLASMONS , *QUANTUM DOTS , ARCHITECTURE , COLLOIDS , COUPLING(INTERACTION) , ENCAPSULATION , EXCITONS , FABRICATION , OPTICAL COMMUNICATIONS , PURIFICATION , QUANTUM THEORY , SHELLS(STRUCTURAL FORMS) , SILICON DIOXIDE , STABILITY


Subject Categories : Inorganic Chemistry
      Quantum Theory and Relativity


Distribution Statement : APPROVED FOR PUBLIC RELEASE