Self-Assembly and Encoding of Polymer-Stabilized Gold Nanoparticles with Surface-Enhanced Raman Reporter Molecules

Langmuir ◽  
2007 ◽  
Vol 23 (21) ◽  
pp. 10539-10545 ◽  
Author(s):  
Zul Merican ◽  
Tara L. Schiller ◽  
Craig J. Hawker ◽  
Peter M. Fredericks ◽  
Idriss Blakey
Keyword(s):  
Gold Nanoparticles ◽  
Self Assembly ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Polymer Stabilized

scholarly journals Self-Assembly of Large Gold Nanoparticles for Surface-Enhanced Raman Spectroscopy

2017 ◽  
Vol 9 (15) ◽  
pp. 13457-13470 ◽  
Author(s):  
Guang Yang ◽  
Jagjit Nanda ◽  
Boya Wang ◽  
Gang Chen ◽  
Daniel T. Hallinan
Keyword(s):  
Gold Nanoparticles ◽  
Raman Spectroscopy ◽  
Self Assembly ◽  
Surface Enhanced Raman Spectroscopy ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

scholarly journals Size-controlled synthesis of cyclodextrin-capped gold nanoparticles for molecular recognition using surface-enhanced Raman scattering

2021 ◽  
Author(s):  
Koichiro Saito ◽  
Keegan McGehee ◽  
Yasuo Norikane
Keyword(s):  
Gold Nanoparticles ◽  
Molecular Recognition ◽  
Plasmon Resonance ◽  
Self Assembly ◽  
Controlled Synthesis ◽  
Surface Enhanced ◽  
Recognition Ability ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Size Controlled

Cyclodextrin (CD)-capped gold nanoparticles (AuNPs) can be applied in sensing, catalysis, and self-assembly processes due to their molecular recognition ability. As plasmon resonance of AuNPs depends on their size, the...

scholarly journals Preparation of Fe3O4-Ag Nanocomposites with Silver Petals for SERS Application

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1288
Author(s):  
Thi Thuy Nguyen ◽  
Fayna Mammeri ◽  
Souad Ammar ◽  
Thi Bich Ngoc Nguyen ◽  
Trong Nghia Nguyen ◽  
...  
Keyword(s):  
Self Assembly ◽  
Hot Spots ◽  
Surface Enhanced Raman Spectroscopy ◽  
Electrical Field ◽  
Stabilizing Agents ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Sers Sensing ◽  
Applied Electrical Field ◽  
Positively Charged

The formation of silver nanopetal-Fe3O4 poly-nanocrystals assemblies and the use of the resulting hetero-nanostructures as active substrates for Surface Enhanced Raman Spectroscopy (SERS) application are here reported. In practice, about 180 nm sized polyol-made Fe3O4 spheres, constituted by 10 nm sized crystals, were functionalized by (3-aminopropyl)triethoxysilane (APTES) to become positively charged, which can then electrostatically interact with negatively charged silver seeds. Silver petals were formed by seed-mediated growth in presence of Ag+ cations and self-assembly, using L-ascorbic acid (L-AA) and polyvinyl pyrrolidone (PVP) as mid-reducing and stabilizing agents, respectively. The resulting plasmonic structure provides a rough surface with plenty of hot spots able to locally enhance significantly any applied electrical field. Additionally, they exhibited a high enough saturation magnetization with Ms = 9.7 emu g−1 to be reversibly collected by an external magnetic field, which shortened the detection time. The plasmonic property makes the engineered Fe3O4-Ag architectures particularly valuable for magnetically assisted ultra-sensitive SERS sensing. This was unambiguously established through the successful detection, in water, of traces, (down to 10−10 M) of Rhodamine 6G (R6G), at room temperature.

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