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Silver nano-needles : Focused optical field induced solution synthesis and application in remote-excitation nanofocusing SERS

Li, Pan; Pan, Deng; Yang, Longkun; Wei, Hong; He, Shuli; Xu, Hongxing LU and Li, Zhipeng (2019) In Nanoscale 11(5). p.2153-2161
Abstract

Tapered metallic nanostructures that harbor surface plasmons are highly interesting for nanophotonic applications because of their waveguiding and field-focusing properties. Here, we developed a focused optical field induced solution synthesis for unique crystallized silver nano-needles. Under the focused laser spot, inhomogeneous Ag monomer concentration is created, which triggers the uniaxial growth of silver nanostructures along the radial direction with decreasing rate, forming nano-needle structures. These nano-needles are several micrometers long, with diameter attenuating from hundreds to tens of nanometers, and terminated by a sharp apex only a few nanometers in diameter. Moreover, nano-needles with atomically smooth surfaces... (More)

Tapered metallic nanostructures that harbor surface plasmons are highly interesting for nanophotonic applications because of their waveguiding and field-focusing properties. Here, we developed a focused optical field induced solution synthesis for unique crystallized silver nano-needles. Under the focused laser spot, inhomogeneous Ag monomer concentration is created, which triggers the uniaxial growth of silver nanostructures along the radial direction with decreasing rate, forming nano-needle structures. These nano-needles are several micrometers long, with diameter attenuating from hundreds to tens of nanometers, and terminated by a sharp apex only a few nanometers in diameter. Moreover, nano-needles with atomically smooth surfaces show excellent performance for plasmonic waveguiding and unique near-field compression abilities. This nano-needle structure can be used for effective remote-excitation detection/sensing. We also demonstrate the assembling and picking up of nano-needles, which indicate potential applications in intracellular endoscopy, high resolution scanning tips, on-chip nanophotonic devices, etc.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nanoscale
volume
11
issue
5
pages
9 pages
publisher
Royal Society of Chemistry
external identifiers
  • scopus:85060954519
ISSN
2040-3364
DOI
10.1039/c8nr07141a
language
English
LU publication?
yes
id
af8a3d57-ea1d-484c-a2c1-45fe40e03e29
date added to LUP
2019-02-11 11:56:35
date last changed
2019-02-11 11:56:35
@article{af8a3d57-ea1d-484c-a2c1-45fe40e03e29,
  abstract     = {<p>Tapered metallic nanostructures that harbor surface plasmons are highly interesting for nanophotonic applications because of their waveguiding and field-focusing properties. Here, we developed a focused optical field induced solution synthesis for unique crystallized silver nano-needles. Under the focused laser spot, inhomogeneous Ag monomer concentration is created, which triggers the uniaxial growth of silver nanostructures along the radial direction with decreasing rate, forming nano-needle structures. These nano-needles are several micrometers long, with diameter attenuating from hundreds to tens of nanometers, and terminated by a sharp apex only a few nanometers in diameter. Moreover, nano-needles with atomically smooth surfaces show excellent performance for plasmonic waveguiding and unique near-field compression abilities. This nano-needle structure can be used for effective remote-excitation detection/sensing. We also demonstrate the assembling and picking up of nano-needles, which indicate potential applications in intracellular endoscopy, high resolution scanning tips, on-chip nanophotonic devices, etc.</p>},
  author       = {Li, Pan and Pan, Deng and Yang, Longkun and Wei, Hong and He, Shuli and Xu, Hongxing and Li, Zhipeng},
  issn         = {2040-3364},
  language     = {eng},
  month        = {02},
  number       = {5},
  pages        = {2153--2161},
  publisher    = {Royal Society of Chemistry},
  series       = {Nanoscale},
  title        = {Silver nano-needles : Focused optical field induced solution synthesis and application in remote-excitation nanofocusing SERS},
  url          = {http://dx.doi.org/10.1039/c8nr07141a},
  volume       = {11},
  year         = {2019},
}