scholarly journals AgNPs decorated 3D bionic silicon nanograss arrays pattern with high-density hot-spots for SERS sensing via green galvanic displacement without additives

RSC Advances ◽  
2021 ◽  
Vol 11 (44) ◽  
pp. 27152-27159
Author(s):  
Li Wang ◽  
Jian Huang ◽  
Mei-Juan Su ◽  
Jin-Di Wu ◽  
Weisheng Liu
Keyword(s):  
Hot Spots ◽  
High Density ◽  
Galvanic Displacement ◽  
Si Substrate ◽  
Plasma Interaction ◽  
Organic Reagents ◽  
Vls Growth ◽  
Sers Sensing

The Si nanograss arrays are directly grown on Si substrate via catalyst-assisted VLS growth and subsequent plasma interaction. AgNPs were rapidly immobilized on Si nanograss arrays for SERS sensing, without any organic reagents and additives.

Polyamide@Ag coralloid nanoarrays with 3D high-density hot spots for ultrasensitive SERS sensing

2020 ◽  
Vol 397 ◽  
pp. 125434
Author(s):  
Yi Li ◽  
Lu Yu ◽  
Jiansheng Li ◽  
Lianjun Wang ◽  
Rui Lu
Keyword(s):  
Hot Spots ◽  
High Density ◽  
Sers Sensing

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.

Control of Crystal Orientation of Epitaxial Si nanowires on Si Substrate Using AAO template

2011 ◽  
Vol 1350 ◽  
Author(s):  
Tomohiro Shimizu ◽  
Qi Wang ◽  
Chonge Wang ◽  
Fumihiro Inoue ◽  
Makoto Koto ◽  
...  
Keyword(s):  
Crystal Orientation ◽  
Growth Direction ◽  
Nanowire Arrays ◽  
Si Nanowires ◽  
Aao Template ◽  
Si Substrate ◽  
Anodic Aluminum ◽  
Transmission Electron ◽  
Growth Method ◽  
Vls Growth

ABSTRACTControl of crystal orientation of vertically grown epitaxial Si (111) and (110) nanowire arrays on Si substrate has been demonstrated using a combination of an anodic aluminum oxide (AAO) template and vapor – liquid – solid (VLS) growth method. The crystal orientation of the nanowire was investigated by transmission electron microscopy. A growth direction of the nanowire arrays was guided perpendicular to the surface of the substrate by the AAO template, and the crystal orientation of the nanowire arrays was selected using the single crystal Si substrate properly cut in desired orientation.

Binary “island” shaped arrays with high-density hot spots for surface-enhanced Raman scattering substrates

Nanoscale ◽  
2018 ◽  
Vol 10 (29) ◽  
pp. 14220-14229 ◽  
Author(s):  
Weidong Zhao ◽  
Shuyuan Xiao ◽  
Yuxian Zhang ◽  
Dong Pan ◽  
Jiahui Wen ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Hot Spots ◽  
Surface Enhanced Raman Scattering ◽  
High Density ◽  
Self Assembled Monolayer ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Self Assembled

The BISA with high-density hot spots as reproducible SERS substrates by combining an opal structure with self-assembled monolayer AuNPs is demonstrated.

Selective strain incorporation and retention into Si-substrate through VLS growth of TiO2nano-islands

2017 ◽  
Vol 4 (2) ◽  
pp. 025005 ◽  
Author(s):  
Mainak Palit ◽  
Basudev Nag Chowdhury ◽  
Avishek Das ◽  
Souvik Das ◽  
Sanatan Chattopadhyay
Keyword(s):  
Si Substrate ◽  
Vls Growth

10×-Enhanced Heterogeneous Nanocatalysis on a Nanoporous Gold Disk Array with High-Density Hot Spots

2019 ◽  
Vol 11 (14) ◽  
pp. 13499-13506 ◽  
Author(s):  
Md Masud Parvez Arnob ◽  
Camille Artur ◽  
Ibrahim Misbah ◽  
Syed Mubeen ◽  
Wei-Chuan Shih
Keyword(s):  
Hot Spots ◽  
High Density ◽  
Nanoporous Gold ◽  
Disk Array

Simply controllable growth of single crystal plasmonic Au–Ag nano-spines with anisotropic multiple sites for highly sensitive and uniform surface-enhanced Raman scattering sensing

RSC Advances ◽  
2016 ◽  
Vol 6 (70) ◽  
pp. 66056-66065 ◽  
Author(s):  
Dongzhen Chen ◽  
Zhongxiao Song ◽  
Feng Chen ◽  
Jian Huang ◽  
Jing Wei ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Single Crystal ◽  
Hot Spots ◽  
Surface Enhanced Raman Scattering ◽  
Highly Sensitive ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Controllable Growth ◽  
Enhanced Raman Scattering ◽  
Sers Sensing

Simply synthesizing Au core@Au–Ag alloy spine nanostructures with a highly tunable LSPR band and dense “hot spots” for SERS sensing.

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