In-plane optical anisotropy and SERS detection efficiency of self-organized gold nanoparticles on silicon nanoripples: Roles of growth angle and postgrowth annealing

2020 ◽  
Vol 512 ◽  
pp. 145703
Author(s):  
Mahesh Saini ◽  
Sebin Augustine ◽  
Mukesh Ranjan ◽  
Tapobrata Som
Keyword(s):  
Gold Nanoparticles ◽  
Optical Anisotropy ◽  
Detection Efficiency ◽  
Growth Angle ◽  
Self Organized ◽  
Sers Detection ◽  
Postgrowth Annealing

scholarly journals Commercial Gold Nanoparticles on Untreated Aluminum Foil: Versatile, Sensitive, and Cost-Effective SERS Substrate

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Kristina Gudun ◽  
Zarina Elemessova ◽  
Laura Khamkhash ◽  
Ekaterina Ralchenko ◽  
Rostislav Bukasov
Keyword(s):  
Gold Nanoparticles ◽  
Low Cost ◽  
Aluminum Foil ◽  
Cost Effective ◽  
Sers Substrate ◽  
Au Film ◽  
Response Range ◽  
Sers Detection ◽  
Film Substrate ◽  
Linear Response Range

We introduce low-cost, tunable, hybrid SERS substrate of commercial gold nanoparticles on untreated aluminum foil (AuNPs@AlF). Two or three AuNP centrifugation/resuspension cycles are proven to be critical in the assay preparation. The limits of detection (LODs) for 4-nitrobenzenethiol (NBT) and crystal violet (CV) on this substrate are about 0.12 nM and 0.19 nM, respectively, while maximum analytical SERS enhancement factors (AEFs) are about 107. In comparative assays LODs for CV measured on AuNPs@Au film and AuNPs@glass are about 0.35 nM and 2 nM, respectively. The LOD for melamine detected on AuNPs@ Al foil is 27 ppb with 3 orders of magnitude for linear response range. Overall, AuNPs@AlF demonstrated competitive performance in comparison with AuNPs@ Au film substrate in SERS detection of CV, NBT, and melamine. To check the versatility of the AuNPs@AlF substrate we also detected KNO3 with LODs of 0.7 mM and SERS EF around 2 × 103, which is on the same order with SERS EF reported for this compound in the literature.

Rapid simultaneous adsorption and SERS detection of acid orange II using versatile gold nanoparticles decorated NH2-MIL-101(Cr)

2020 ◽  
Vol 1129 ◽  
pp. 126-135 ◽  
Author(s):  
Qinzhi Wang ◽  
Zhan Shi ◽  
Zhi Wang ◽  
Yijian Zhao ◽  
Jianuo Li ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Orange Ii ◽  
Acid Orange ◽  
Simultaneous Adsorption ◽  
Sers Detection ◽  
Acid Orange Ii

Broad band tuning of the plasmonic resonance of gold nanoparticles hosted in self-organized soft materials

2011 ◽  
Vol 21 (47) ◽  
pp. 18967 ◽  
Author(s):  
Luciano De Sio ◽  
Roberto Caputo ◽  
Ugo Cataldi ◽  
Cesare Umeton
Keyword(s):  
Gold Nanoparticles ◽  
Broad Band ◽  
Soft Materials ◽  
Plasmonic Resonance ◽  
Self Organized

Self-organized Multilayer Films and Porous Nanocomposites of Gold Nanoparticles with Octa(3-aminopropyl)octasilsesquioxane

2007 ◽  
Vol 17 (2) ◽  
pp. 447-457 ◽  
Author(s):  
Xiaqin Wang ◽  
Kensuke Naka ◽  
Meifang Zhu ◽  
Hidekatsu Kuroda ◽  
Hideaki Itoh ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Multilayer Films ◽  
Self Organized ◽  
Porous Nanocomposites

Self-Healing and Self-Organized Gold Nanoparticle Films at a Water/Organic Solvent Interface

2006 ◽  
Vol 6 (1) ◽  
pp. 130-134 ◽  
Author(s):  
Olivier Balmes ◽  
Jan-Olov Bovin ◽  
Jan-Olle Malm
Keyword(s):  
Thin Film ◽  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Gold Nanoparticles ◽  
Organic Solvent ◽  
Continuous Production ◽  
Self Healing ◽  
Self Organized ◽  
Transmission Electron ◽  
20 Nm

Gold nanoparticles (5 nm and 20 nm) have been synthesized and stabilized with mercaptoundecanol. These particles, although insoluble in water or common organic solvents, spread as a thin film at the liquid–liquid interface between a water phase and an organic phase. Films of these gold nanoparticles have been observed both by conventional transmission electron microscopy of deposited samples and by cryo-transmission electron microscopy of plunge-frozen samples. The film can be monolayered and extend over centimeter-sized areas. The particle films spontaneously re-assemble and self-organize at the interface when disrupted. This self-healing capacity of the film should make it possible to build a device for continuous production and deposition of the film.

Functionalized Gold Nanoparticles Coated Polymer Spheres as SERS Substrate for the Detection of TNT Explosives

2014 ◽  
Vol 924 ◽  
pp. 366-370 ◽  
Author(s):  
Hai Xin Gu ◽  
Lin Xue ◽  
Ya Heng Zhang ◽  
Yong Feng Zhang ◽  
Li Ying Cao
Keyword(s):  
Gold Nanoparticles ◽  
Sodium Citrate ◽  
Polymer Surface ◽  
Sers Substrate ◽  
Conjugation System ◽  
Sers Detection ◽  
Polymer Sphere ◽  
Real World Situation ◽  
Tnt Detection ◽  
Polymer Spheres

In this paper, we fabricated the 4-aminobenzenethiol modified gold nanoparticles onto polymer spheres as SERS substrate to selectively detect 2,4,6-trinitrotoluene (TNT) explosives. The gold nanoseeds were fixed on polymer surface by reduction of HAuCl4·3H2O with sodium citrate. About 60~100nm nanoparticles were formed from the previous seeds and self-assembled by 4-aminobenzenethiol. The functionalized gold nanopartilces aggregation coated on large polymer sphere surface not only absorbed more TNT molecules via conjugation system, but also generated numerous "hot spots". It was demonstrated that this substrate displayed high SERS activity for TNT detection. It could also be anticipated that the aforementioned material would be used for fast and sensitive SERS detection of TNT in real-world situation. Keywords: gold nanopartilces, SERS, TNT, functionalization

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