In situ modulation of gold nanorod's surface charge drives the growth of end-to-end assemblies from dimers to large networks that enhance single-molecule fluorescence by 10?000-fold

Show simple item record

dc.contributor.author Kar, Ashish
dc.contributor.author Thambi, Varsha
dc.contributor.author Paital, Diptiranjan
dc.contributor.author Khatua, Saumyakanti
dc.date.accessioned 2020-08-07T14:26:29Z
dc.date.available 2020-08-07T14:26:29Z
dc.date.issued 2020-05
dc.identifier.citation Kar, Ashish; Thambi, Varsha; Paital, Diptiranjan and Khatua, Saumyakanti, "In situ modulation of gold nanorod's surface charge drives the growth of end-to-end assemblies from dimers to large networks that enhance single-molecule fluorescence by 10?000-fold", Nanoscale Advances, DOI: 10.1039/D0NA00303D, vol. 2, no. 7, pp. 2688-2692, May 2020. en_US
dc.identifier.issn 2516-0230
dc.identifier.uri http://dx.doi.org/10.1039/D0NA00303D
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/5598
dc.description.abstract End-to-end assemblies of anisotropic plasmonic nanostructures with small nanogaps are of great interest as they create strong hot spots for enhancing weak fluorescence and/or scattering of molecules. Here we report the growth of dithiol-linked end-to-end assemblies of gold nanorods from dimers to large networks containing thousands of individual nanorods, directed by in situ tuning of nanorod's surface charge. Surface charge was lowered to initiate the aggregation process but was subsequently increased to achieve slow tip-specific growth over seven days to form end-to-end networks of nanorods, which were stable in solution for over one month. Furthermore, we showed that these assemblies contained strong plasmonic hot spots which enhanced the fluorescence signal of a weak emitter by 104-fold. This enhancement is approximately 10-fold larger than that obtained using a single gold nanorod and is comparable to the largest enhancement obtained using more expensive lithographically made in-plane antenna arrays.
dc.description.statementofresponsibility by Ashish Kar, Varsha Thambi, Diptiranjan Paital and Saumyakanti Khatua
dc.format.extent vol. 2, no. 7, pp. 2688-2692
dc.language.iso en_US en_US
dc.publisher Royal Society of Chemistry en_US
dc.title In situ modulation of gold nanorod's surface charge drives the growth of end-to-end assemblies from dimers to large networks that enhance single-molecule fluorescence by 10?000-fold en_US
dc.type Article en_US
dc.relation.journal Nanoscale Advances


Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search Digital Repository


Browse

My Account