Focused-ion-beam-fabricated Au nanorods coupled with Ag nanoparticles used as surface-enhanced Raman scattering-active substrate for analyzing trace melamine constituents in solution

Sivashanmugan, Kundan; Liao, Jiunn Der; Liu, Bernard Haochih; Yao, Chih Kai

doi:10.1016/j.aca.2013.09.011

Cited by 49 publications

(60 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5). In the case, chemical effect occurred at the interface of cells and the surfaces of NNs area [9], [10], [17]. In this study, we believed that the SERS spectra of sample NN_2 could be clearly distinguished between FB and FaDu-cells.…”

mentioning

confidence: 71%

“…An average roughness of ≈1.42 nm and X-ray diffraction pattern (111) were obtained [9], [10]. The optimal thickness of Au layer was kept ≈350 nm.…”

Section: Fabrication Of Au Nanoneedle Arraysmentioning

confidence: 94%

“…The macromolecule size samples (i.e., cells) were required strong LSPR substrate to acquire the Raman information from target species. However, the Raman scattering characteristics strongly depended on the geometry of nanostructures [10]. In this work, Au nanoneedle (NN) arrays were fabricated using a focused ion beam (FIB).…”

Section: Introductionmentioning

confidence: 99%

“…The varied Dt-t distances simultaneously changed with the formation of sharp NNs surface. In particularly, sharp NNs surface was significantly producing the SPR effect [10], [12]. R6G solution (10 -5 M) was used to determine the SERS effect for fibAu_NN samples NN_1 to NN_3 via Raman spectroscopy using a diode laser with a wavelength of 785 nm.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Recognition of Normal and Abnormal Cells through SERS-Active FIB-Fabricated Au Nanoneedle Array Structure

Sivashanmugan¹,

Liao²,

Shao³

2015

IJBBB

Self Cite

View full text Add to dashboard Cite

Au nanoneedle arrays were fabricated using a focused ion beam (fibAu_NN). With rhodamine 6G used as the probe molecule on the optimized Surface-enhanced Raman scattering (SERS) substrate, an enhancement of 7 orders of magnitude was obtained at low concentration (10 -5 M). Moreover, a strong electromagnetic field effect is generated in and around these NNs, creating localized surface plasmon resonance. In the biological assessment, the optimized fibAu_NN substrate was able to distinguish cancer and normal cells. The SERS effect was extensively increased at incident laser interacted area of cells and sharp NNs surfaces.

show abstract

mentioning

confidence: 71%

“…An average roughness of ≈1.42 nm and X-ray diffraction pattern (111) were obtained [9], [10]. The optimal thickness of Au layer was kept ≈350 nm.…”

Section: Fabrication Of Au Nanoneedle Arraysmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Recognition of Normal and Abnormal Cells through SERS-Active FIB-Fabricated Au Nanoneedle Array Structure

Sivashanmugan¹,

Liao²,

Shao³

2015

IJBBB

Self Cite

View full text Add to dashboard Cite

show abstract

“…These are concentrated and interact with one another in the urine-filled renal microtubules, where they form large numbers of round, yellow crystals which block and damage the renal cells that line the tubes and cause the kidneys to malfunction. 5,6 A safety limit for MEL ingestion has been officially set at 2.5 ppm for adult food and 1.0 ppm for infant formula by the US Food and Drug Administration. Ingestion of MEL at levels above the safety limit may cause kidney failure and even death, particularly for vulnerable individuals such as infants and young children.…”

Section: Introductionmentioning

confidence: 99%

Rapid and Highly Sensitive Determination of Melamine in Different Food Samples by Corona Discharge Ion Mobility Spectrometry after Dispersive Liquid-Liquid Microextraction

Mirzajani¹,

Tavaf²

2016

Journal of the Brazilian Chemical Society

View full text Add to dashboard Cite

In this work, for the first time, a highly sensitive method based on dispersive liquid-liquid microextraction coupled with positive corona discharge ion mobility spectrometry as a fast and inexpensive technique has been evaluated for the direct determination of melamine. The effective parameters influencing the microextraction efficiency, such as pH, the properties of extraction and dispersion solvent were investigated. Under the optimum conditions, analytical parameters such as linearity, precision and limit of detection were evaluated. The calibration graph of melamine determination using the proposed method has two regions of linearity from 0.5 to 70 ng mL -1 and 70 to 1500 ng mL -1 , the limit of detection and limit of quantification are 0.25 and 0.5 ng mL -1 , respectively, and the relative standard deviation was less than 3% for all experiments. The proposed method was successfully applied for the determination of melamine in the milk, dairy products and egg yolk.

show abstract

ZnGa₂O₄ Nanorod Arrays Decorated with Ag Nanoparticles as Surface‐Enhanced Raman‐Scattering Substrates for Melamine Detection

et al. 2014

View full text Add to dashboard Cite

The availability of sensitive, reproducible, and stable substrates is critically important for surface‐enhanced Raman spectroscopy (SERS)‐based applications, but it presently remains a challenge. In this work, well‐aligned zinc gallate (ZnGa2O4) nanorod arrays grown on a Si substrate by chemical vapor deposition were used as templates to fabricate SERS substrates by deposition of Ag nanoparticles onto the ZnGa2O4 nanorod surfaces. The coverage of the Ag nanoparticles on the ZnGa2O4 nanorod surfaces was easily controlled by varying the amount of AgNO3. SERS measurements showed that the number density of Ag nanoparticles on the ZnGa2O4 nanorod surfaces had a great effect on SERS activity. The SERS signals collected by point‐to‐point and SERS mapping images showed that as‐prepared SERS substrates exhibited good spatial uniformity and reproducibility. Detection of melamine molecules at low concentrations (1.0×10−7 M) was used as an example to show the possible application of such a substrate. In addition, the effect of benzoic acid on the detection of melamine was also investigated. It was found that the SERS signal intensity of melamine decreased greatly as the concentration of benzoic acid was increased.

show abstract

Focused-ion-beam-fabricated Au nanorods coupled with Ag nanoparticles used as surface-enhanced Raman scattering-active substrate for analyzing trace melamine constituents in solution

Cited by 49 publications

References 66 publications

Recognition of Normal and Abnormal Cells through SERS-Active FIB-Fabricated Au Nanoneedle Array Structure

Recognition of Normal and Abnormal Cells through SERS-Active FIB-Fabricated Au Nanoneedle Array Structure

Rapid and Highly Sensitive Determination of Melamine in Different Food Samples by Corona Discharge Ion Mobility Spectrometry after Dispersive Liquid-Liquid Microextraction

ZnGa₂O₄ Nanorod Arrays Decorated with Ag Nanoparticles as Surface‐Enhanced Raman‐Scattering Substrates for Melamine Detection

Contact Info

Product

Resources

About

Focused-ion-beam-fabricated Au nanorods coupled with Ag nanoparticles used as surface-enhanced Raman scattering-active substrate for analyzing trace melamine constituents in solution

Cited by 49 publications

References 66 publications

Recognition of Normal and Abnormal Cells through SERS-Active FIB-Fabricated Au Nanoneedle Array Structure

Recognition of Normal and Abnormal Cells through SERS-Active FIB-Fabricated Au Nanoneedle Array Structure

Rapid and Highly Sensitive Determination of Melamine in Different Food Samples by Corona Discharge Ion Mobility Spectrometry after Dispersive Liquid-Liquid Microextraction

ZnGa2O4 Nanorod Arrays Decorated with Ag Nanoparticles as Surface‐Enhanced Raman‐Scattering Substrates for Melamine Detection

Contact Info

Product

Resources

About

ZnGa₂O₄ Nanorod Arrays Decorated with Ag Nanoparticles as Surface‐Enhanced Raman‐Scattering Substrates for Melamine Detection