A new heterostructured SERS substrate: free-standing silicon nanowires decorated with graphene-encapsulated gold nanoparticles

Nanoscale ◽  
2017 ◽  
Vol 9 (16) ◽  
pp. 5263-5272 ◽  
Author(s):  
Yuan Li ◽  
John Dykes ◽  
Todd Gilliam ◽  
Nitin Chopra
Keyword(s):  
Gold Nanoparticles ◽  
Silicon Nanowires ◽  
Sers Substrate ◽  
Free Standing

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.

Cellulose Dialysis Membrane Tubing doped with Gold Nanoparticles as SERS Substrate

2022 ◽  
pp. 131718
Author(s):  
L.F. Gomez –Caballero ◽  
J.L. Pichardo-Molina ◽  
G. Basurto-Islas
Keyword(s):  
Gold Nanoparticles ◽  
Sers Substrate ◽  
Dialysis Membrane

scholarly journals Superstructures: Directing Gold Nanoparticles into Free‐Standing Honeycomb‐Like Ordered Mesoporous Superstructures (Small 31/2019)

Small ◽  
2019 ◽  
Vol 15 (31) ◽  
pp. 1970165
Author(s):  
Xiaotong Wu ◽  
Jinping Chen ◽  
Lin Xie ◽  
Jing Li ◽  
Jing Shi ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Free Standing ◽  
Ordered Mesoporous

scholarly journals Application of Doehlert Matrix for an Optimized Preparation of a Surface-Enhanced Raman Spectroscopy (SERS) Substrate Based on Silicon Nanowires for Ultrasensitive Detection of Rhodamine 6G

2019 ◽  
Vol 74 (2) ◽  
pp. 168-177 ◽  
Author(s):  
Awatef Ouhibi ◽  
Maroua Saadaoui ◽  
Nathalie Lorrain ◽  
Mohammed Guendouz ◽  
Noureddine Raouafi ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Silver Nitrate ◽  
Silicon Nanowires ◽  
Rhodamine 6G ◽  
Surface Enhanced Raman Spectroscopy ◽  
Influential Factor ◽  
Metallic Surface ◽  
Sers Substrate ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

In this work, we combined a hierarchical nano-array effect of silicon nanowires (SiNWs) with a metallic surface of silver nanoparticles (AgNPs) to design a surface-enhanced Raman spectroscopy (SERS) scattering substrate for sensitive detection of Rhodamine 6G (R6G) which is a typical dye for fluorescence probes. The SiNWs were prepared by Metal-Assisted Chemical Etching (MACE) of n-Si (100) wafers. The Doehlert design methodology was used for planning the experiment and analyzing the experimental results. Thanks to this methodology, the R6G SERS response has been optimized by studying the effects of the silver nitrate concentration, silver nitrate and R6G immersion times and their interactions. The immersion time in R6G solution stands out as the most of influential factor on the SERS response.

Periodic chains of gold nanoparticles and the role of oxygen during the growth of silicon nanowires

2006 ◽  
Vol 89 (17) ◽  
pp. 173111 ◽  
Author(s):  
Florian M. Kolb ◽  
Andreas Berger ◽  
Herbert Hofmeister ◽  
Eckhard Pippel ◽  
Ulrich Gösele ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Silicon Nanowires

scholarly journals Gold Nanoparticles with Different Particle Sizes for the Quantitative Determination of Chlorpyrifos Residues in Soil by SERS

2019 ◽  
Vol 20 (11) ◽  
pp. 2817 ◽  
Author(s):  
Yong He ◽  
Shupei Xiao ◽  
Tao Dong ◽  
Pengcheng Nie
Keyword(s):  
Gold Nanoparticles ◽  
Limit Of Detection ◽  
Soil Surface ◽  
Surface Enhanced Raman Spectroscopy ◽  
Sers Substrate ◽  
Least Squares Regression ◽  
Simple Method ◽  
Good Linear ◽  
Relative Standard

Chlorpyrifos (CPF) is widely used in the prevention and control of crop pests and diseases in agriculture. However, the irrational utilization of pesticides not only causes environmental pollution but also threatens human health. Compared with the conventional techniques for the determination of pesticides in soil, surface-enhanced Raman spectroscopy (SERS) has shown great potential in ultrasensitive and chemical analysis. Therefore, this paper reported a simple method for synthesizing gold nanoparticles (AuNPs) with different sizes used as a SERS substrate for the determination of CPF residues in soil for the first time. The results showed that there was a good linear correlation between the SERS characteristic peak intensity of CPF and particle size of the AuNPs with an R2 of 0.9973. Moreover, the prepared AuNPs performed great ultrasensitivity, reproducibility and chemical stability, and the limit of detection (LOD) of the CPF was found to be as low as 10 μg/L. Furthermore, the concentrations ranging from 0.01 to 10 mg/L were easily observed by SERS with the prepared AuNPs and the SERS intensity showed a good linear relationship with an R2 of 0.985. The determination coefficient (Rp2) reached 0.977 for CPF prediction using the partial least squares regression (PLSR) model and the LOD of CPF residues in soil was found to be as low as 0.025 mg/kg. The relative standard deviation (RSD) was less than 3.69% and the recovery ranged from 97.5 to 103.3%. In summary, this simple method for AuNPs fabrication with ultrasensitivity and reproducibility confirms that the SERS is highly promising for the determination of soil pesticide residues.

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

Stability and Performance of Heterogeneous Anode Assemblies of Silicon Nanowires on Carbon Meshes for Lithium-Sulfur Battery Applications

2015 ◽  
Vol 1751 ◽  
Author(s):  
Andreas Krause ◽  
Jan Brueckner ◽  
Susanne Doerfler ◽  
Florian M. Wisser ◽  
Holger Althues ◽  
...  
Keyword(s):  
Silicon Nanowires ◽  
Volume Expansion ◽  
Specific Capacity ◽  
Current Collector ◽  
Si Nanowires ◽  
Free Standing ◽  
Fiber Network ◽  
And Performance ◽  
Sulfur Battery ◽  
Full Charge

ABSTRACTSi is a promising anode material for Li storage due to its high theoretical specific capacity surpassing 4200 Ah/kg. Si based anodes exhibit an extreme instability upon electrochemical incorporation of Li given the accompanied large volume expansion of about 400%. We show innovative anode assemblies composed of a forest of free standing Si nanowires conformally integrated on carbon meshes. The morphology of silicon nanowires allows a volume expansion and compression lowering strain incorporation. In this paper, we demonstrate the utilization of SiNW grown on top of a current collector made of a carbon fiber network. This leads to an increase of stability of Si with a remaining effective capacitance above 2000 Ah/kg(Si) after 225 full charge/discharge cycles. This is significantly better compared to previous results shown in literature. The anodes are fabricated by a simple and inexpensive method promising for a transfer into industrial integration.

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