Local thermal elevation probing of metal nanostructures during laser illumination utilizing surface-enhanced Raman scattering from a single-walled carbon nanotube

2013 ◽  
Vol 15 (12) ◽  
pp. 4270 ◽  
Author(s):  
Mai Takase ◽  
Hideki Nabika ◽  
Shinji Hoshina ◽  
Masanobu Nara ◽  
Kei-ichiro Komeda ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Metal Nanostructures ◽  
Single Walled Carbon Nanotube ◽  
Laser Illumination ◽  
Single Walled Carbon ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

scholarly journals Fabrication of Highly Rough Ag Nanobud Substrates and Surface-Enhanced Raman Scattering ofλ-DNA Molecules

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Chuyun Deng ◽  
Wanyun Ma ◽  
Jia-Lin Sun
Keyword(s):  
Raman Scattering ◽  
Single Molecule ◽  
Surface Enhanced Raman Scattering ◽  
Silver Nanowire ◽  
Metal Nanostructures ◽  
Dna Molecules ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Raman scattering signals can be enhanced by several orders of magnitude on surface-enhanced Raman scattering (SERS) substrates made from noble metal nanostructures. Some SERS substrates are even able to detect single-molecule Raman signals. A novel silver nanobud (AgNB) substrate with superior SERS activity was fabricated with a solid-state ionics method. The AgNB substrate was formed by tightly collocated unidirectional 100 nm size silver buds, presenting a highly rough surface topography. Distinct SERS signals of singleλ-DNA molecules in water were detected on AgNB substrates. AgNB substrates were compared with disordered silver nanowire (AgNW) substrates manufactured by the same method through the SERS detection ofλ-DNA solutions. This original AgNB substrate provides a reliable approach towards trace analysis of biomacromolecules and promotes the utilization of the SERS technique in biomedical research.

Synthesis and Near-Field Enhancement of Composite Nanoarrays Based on Electrodeposition and in Situ Reaction

NANO ◽  
2021 ◽  
Author(s):  
Jing Wu ◽  
Jiali Shen ◽  
Jinghuai Fang ◽  
Lu Xu
Keyword(s):  
Synergistic Effect ◽  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Metal Nanostructures ◽  
Nanoparticle Arrays ◽  
Ag Nanoparticle ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Since the morphology and element composition of metal nanostructures strongly affect the surface plasma oscillation characteristics, it has been widely concerned in surface enhanced Raman scattering (SERS). Herein, we proposed a novel route to fabricate composite Au/Ag nanoparticle arrays with synergistic effect for electromagnetic enhancement. Ag nanoparticles were electrodeposited onto a home-made template with highly ordered bowl-like pits. After a novel method of “confined annealing”, we further achieved well-regulated spherical Ag NP arrays, and the composite Au/Ag nanoparticle arrays were finally obtained via in situ replacement. The fabricated composite nanostructures showed stable and sensitive surface enhanced Raman scattering (SERS) performance mainly due to the synergistic effect and abundant “hot spots”, with the enhancement factor (EF) of [Formula: see text] for crystal violet (CV) molecules. In addition, this simple and effective preparation process greatly improved the uniformity of three-dimensional nanostructures, providing a new idea for further improving the stability of SERS signals.

Sign in / Sign up

Export Citation Format

Share Document