NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.

Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.

U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PUBLICATIONS

Bioconjugated Nanohybrids of Ag Nanoparticles and CdTe Nanowires With Photoluminescence Enhancement

Published

Author(s)

J Lee, T Javed, T Skieni, Garnett W. Bryant, A O. Govorov, N A. Kotov

Abstract

Hybrid assembly of inorganic nanomaterials via chemical and biological bonding has received widespread attention. Nanomaterials that can be conjugated with other nanomaterials by ligand-receptor, antigen-antibody reactions, polymer tethering, and DNA hybridization are important for fundamental studies of electronic and optical processes in the nano-scale regime, as well as for development of advanced sensing and imaging devices. Recently, we observed that the collective plasmon resonance in intentionally assembled Au nanoparticles (NPs) can change the PL intensity and exciton dynamics of CdTe NPs and nanowires (NWs). Here, we investigate new superstructures based on Ag NPs instead of Au NPs. Ag based superstructures also demonstrate remarkable optical effects i.e., the enhancement of NW PL, stemming from SERS-like collective interactions of NPs and NWs in the secured conjugated superstructures. Although the observed optical phenomena in Ag- and Au-conjugated superstructures look similar, the underlying mechanism of emission enhancement in the Ag-NP conjugated superstructures is qualitatively different from the case of Au-based superstructures that we observed previously. We suggest that the emission enhancement due to Ag NP shells comes from the increase of absorption because the excitation wavelength is close to the plasmon resonance in the Ag-shell while the enhancement factor due to Au NP shell originates from the wavelength of exciton emission from NWs.
Citation
Advanced Materials
Pub Type
Journals

Keywords

excitons, nanooptics, nanoparticles, nanowires, photoluminescence, plasmons, quantum dots

Citation

Lee, J. , Javed, T. , Skieni, T. , Bryant, G. , Govorov, A. and Kotov, N. (2021), Bioconjugated Nanohybrids of Ag Nanoparticles and CdTe Nanowires With Photoluminescence Enhancement, Advanced Materials (Accessed October 14, 2025)

Issues

If you have any questions about this publication or are having problems accessing it, please contact [email protected].

Created October 12, 2021
Was this page helpful?