Polyacrylic acid sodium salt film entrapped Ag-nanocubes as molecule traps for SERS detection

Huang, Zhulin; Meng, Guowen; Huang, Qing; Chen, Bin; Zhou, Fei; Hu, Xiaoye; Qian, Yuguo; Tang, Haibin; Chu, Zhaoqin

doi:10.1007/s12274-014-0480-5

Cited by 28 publications

(22 citation statements)

References 38 publications

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“…An acid-enhanced evaporation process is generally required for the detection of trace inorganic explosives involving KNO 3 , KClO 3 , and KClO 4 detected by the same method [18]. Raman spectroscopy is one of the techniques better suited for the identification and characterization of analytes due to its unique features, such as high sensitivity, generation of a unique spectroscopic fingerprint, and on-site detection [19][20][21][22]. Moreover, the development of portable Raman spectrometers expands its application to on-site analysis, due to the high cost-effectiveness, rapid analytical speed, and non-destructive detection [23,24].…”

Section: Introductionmentioning

confidence: 99%

A positively charged silver nanowire membrane for rapid on-site swabbing extraction and detection of trace inorganic explosives using a portable Raman spectrometer

2016

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The sensitive and on-site detection of inorganic explosives has raised serious concerns regarding public safety. However, high stability and non-volatility features currently limit their rapid on-site detection. Surface-enhanced Raman spectroscopy (SERS) is emerging as a powerful technique for the trace-level detection of different molecules. Plasmonic Ag nanowires were produced by a hydrothermal synthesis method using polyvinylpyrrolidone (PVP) as a negatively charged stabilizer. Here, we report a rapid detection method for inorganic explosives based on a simple surface swab with a positively charged diethyldithiocarbamate-modified Ag nanowire membrane coupled with SERS. This membrane, serving as an excellent SERS substrate with high uniformity, stability, and reusability, can capture both typical oxidizers in inorganic explosives and organic nitro-explosives, via electrostatic interaction. The detection level of perchlorates (ClO 4 − ), chlorates (ClO 3 − ), nitrates (NO 3 − ), picric acid, and 2,4-dinitrophenol is as high as 2.0, 1.7, 0.1, 45.8, and 36.6 ng, respectively. In addition, simulated typical inorganic explosives such as black powders, firecrackers, and match heads could also be detected. We believe that this membrane represents an attractive alternative for rapid on-site detection of inorganic explosives with high efficiency.

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Section: Introductionmentioning

confidence: 99%

A positively charged silver nanowire membrane for rapid on-site swabbing extraction and detection of trace inorganic explosives using a portable Raman spectrometer

2016

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“…The 15% (w/v) CA-AD solutions with different solvent ratios were prepared by dissolving 2.25 g CA into 15 mL mixtures of DMAc and acetone with the acetone-to-DMAc ratio of 2/1, 1/2, 1/4 and 1/8, respectively, under magnetic stirring at 45 • C overnight. For preparing Ag nanoparticles (NPs) dispersed CA solution, Ag-NPs with the edge length ~50 nm were first prepared according to our previously reported procedures [38] and mainly involved the reduction of AgNO 3 by pentanediol in the presence of PVP and NaCl at 155 • C. Then the as-prepared Ag-NPs were re-dispersed in the CA-D solution, followed by a vigorous ultrasonication to obtain a homogeneous solution.…”

Section: Preparation Of Polymer Solutionsmentioning

confidence: 99%

Effect of Solution Miscibility on the Morphology of Coaxial Electrospun Cellulose Acetate Nanofibers

Yao

et al. 2021

Polymers

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Coaxial electrospinning (co-electrospinning) technique has greatly expanded the universality of fabricating core-shell polymer nanofibers. However, the effect of solution miscibility on the morphology of co-electrospun products remains unclear. Herein, different cellulose acetate (CA) solutions with high solution miscibility but distinctly different electrospinnability were used to survey the effect of solution miscibility on the co-electrospinning process. The structural characterizations show that co-electrospun products are composed of nanofibers with and without the core-shell structure. This indicates that partial solution mixing occurred during the co-electrospinning process instead of absolute no-mixing or complete mixing. Importantly, the solution miscibility also shows a significant influence on the product morphology. In particular, the transformation from nanofibers to microparticles was realized with the increase of core-to-shell flow ratio during the co-electrospinning of core electrosprayable CA/dimethylacetamide (DMAc) solution and shell electrospinnable CA/acetone-DMAc (2/1, v/v) solution. Results show that the solution miscibility exerts a significant effect on not only the formation of core-shell structure but also the product morphology. This work provides a new insight for the in-depth understanding of the co-electrospinning process.

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“…The SERS effects of Au-NT arrays with different lengths are investigated by selecting R6G as the probe molecules (Fig. 1d), since R6G shows a molecular resonance enhancement when excited at 530 nm [19], which is near the laser used (532 nm) in our work. The main peaks for R6G are assigned to C-C-C ring in-plane bending (612 cm −1 ), C-H out-of-plane bending (773 cm −1 ), C-H in-plane bending (1126 and 1182 cm −1 ), C-O-C stretching (1310 cm −1 ), and aromatic C-C stretching (1360, 1507, 1573 and 1648 cm −1 ) [20].…”

Section: Large-area Au-nt Arraysmentioning

confidence: 99%

Ordered arrays of vertically aligned Au-nanotubes grafted with flocky Au/Ag-nanospikes based on electrodeposition and subsequent redox reaction

Hou

Meng

Huang

et al. 2015

Electrochemistry Communications

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Polyacrylic acid sodium salt film entrapped Ag-nanocubes as molecule traps for SERS detection

Cited by 28 publications

References 38 publications

A positively charged silver nanowire membrane for rapid on-site swabbing extraction and detection of trace inorganic explosives using a portable Raman spectrometer

A positively charged silver nanowire membrane for rapid on-site swabbing extraction and detection of trace inorganic explosives using a portable Raman spectrometer

Effect of Solution Miscibility on the Morphology of Coaxial Electrospun Cellulose Acetate Nanofibers

Ordered arrays of vertically aligned Au-nanotubes grafted with flocky Au/Ag-nanospikes based on electrodeposition and subsequent redox reaction

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