Nanoporous silver with tunable pore characteristics and superior surface enhanced Raman scattering

Li, Runguang; Liu, X.J.; Wang, H.; Wu, Yuan; Chu, X.M.; Liu, Xiongjun

doi:10.1016/j.corsci.2014.03.023

Cited by 59 publications

(32 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in Fig. 4b, only a negligible signal of R6G was observed on the debris precursor (note that the similar material showed significant signals at the same concentration level under the measurement conditions of reported literature13), whereas the SERS signal increases progressively with I 2 treatment, reaching a very high level after 24 h. It is rather interesting that the robust np-Ag-NP built-in microsphere can be easily stuck on the top of a conductive substrate (Fig. 1e) and used as a micro-size working electrode to electrically enrich/adsorb target molecules.…”

Section: Resultssupporting

confidence: 60%

Nanoporous Microsphere Assembly of Iodine-Functionalised Silver Nanoparticles as a Novel Mini-Substrate for Enriching and Sensing

Wang

et al. 2017

Sci Rep

View full text Add to dashboard Cite

Herein, debris particulates of nanoporous silver (np-Ag) were synthesised by a dealloying method, and their integration behaviour and surface-enhanced Raman scattering (SERS) properties during iodine functionalisation were examined. It was found that the dealloyed np-Ag debris particulates gradually assembled to form rigid nanoporous microspheres comprising Ag nano-ligaments due to mechanical collisions during iodine treatment. High-resolution transmission electron microscopy and X-ray photoelectron microscopy clearly showed the iodide surface of np-Ag, which was dotted with iodine or iodide ‘nanoislands’. The exceptional, and unexpected, integration and surface structures result in a highly enhanced localised surface plasmon resonance. Furthermore, the robust nanoporous microspheres can be employed individually as as-produced miniaturised electrodes to electrically enrich target molecules at parts-per-trillion levels, so as to achieve charge selectivity and superior detectability compared with the ordinary SERS effect.

show abstract

Section: Resultssupporting

confidence: 60%

Nanoporous Microsphere Assembly of Iodine-Functionalised Silver Nanoparticles as a Novel Mini-Substrate for Enriching and Sensing

Wang

et al. 2017

Sci Rep

View full text Add to dashboard Cite

show abstract

“…They are promising materials for electrocatalysis [1][2][3][4], sensing [5][6][7], and energy storage devices [8]. Much work has been reported on NP metals, including Pt [9,10], Au [11][12][13], Pd [14], Ag [5,15], Cu [16][17][18], and Ni [19,20].…”

Section: Introductionmentioning

confidence: 99%

General synthesis of sponge-like ultrafine nanoporous metals by dealloying in citric acid

Hong

Pang

et al. 2016

Nano Res.

View full text Add to dashboard Cite

A general method is proposed to synthesize ultrafine nanoporous Cu, Ag, and Ni with novel sponge-like morphologies, high porosities, and large surface areas. The materials are produced by dealloying Mg 65 M 25 Y 10 (M = Cu, Ag, and Ni) metallic glasses in citric acid. Citric acid played a key role due to its capping effect, which reduced the surface diffusion of metals. A structural model consistent with the sponge-like morphology was constructed to calculate the porosity and the surface area. The mechanism of the dealloying process in citric acid, involving ligament formation and coarsening, was illustrated. The mechanism was capable of explaining the experimental trends of dealloying, especially the morphology. A glucose sensor, which can be further developed into a high-precision real-time glucose monitor for medical use, was constructed using sponge-like nanoporous copper. Our findings are not only relevant to understanding the dealloying mechanism of metallic glasses, but also provide promising materials for multiple applications.

show abstract

“…The NPS ribbons with dimension of 40 mm Â 2 mm Â 7 mm were fabricated by electrochemical dealloying Ag 45 Mg 35 Ca 20 metallic glass in 0.025 mol L À1 MgCl 2 aqueous electrolyte for 30 min under a potential of 0.8 V (vs. Ag/AgCl reference electrode, 3 mol L À1 KCl) [31]. Then the dealloyed products were placed in diluted HCl aqueous solution (0.01 mol L À1 ) for 5 min to homogenize.…”

Section: Synthesis Of Nps and Nps/mno 2 Compositesmentioning

confidence: 99%

Nanoporous silver with tunable pore characteristics and superior surface enhanced Raman scattering

Cited by 59 publications

References 31 publications

Nanoporous Microsphere Assembly of Iodine-Functionalised Silver Nanoparticles as a Novel Mini-Substrate for Enriching and Sensing

Nanoporous Microsphere Assembly of Iodine-Functionalised Silver Nanoparticles as a Novel Mini-Substrate for Enriching and Sensing

General synthesis of sponge-like ultrafine nanoporous metals by dealloying in citric acid

Development of electrochemical supercapacitors with uniform nanoporous silver network

Contact Info

Product

Resources

About