Plasmonic detection of Cd 2+ ions using surface-enhanced Raman scattering active core–shell nanocomposite

Thatai, Sheenam; Khurana, Parul; Prasad, Surendra; Kumar, Dinesh

doi:10.1016/j.talanta.2014.11.024

Cited by 43 publications

(19 citation statements)

References 62 publications

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“…The LSPR, which strongly depends on the shape, size and aggregation of nanoparticles, is of great interest in detection various species [3,[7][8][9]39,40]. The plasmonic based detection of Pb 2+ ions is vital to field environment monitoring because of their toxic effects on the human health.…”

Section: Resultsmentioning

confidence: 99%

“…This peak at 522 nm is responsible for the ruby red colour displayed by conventional gold colloids. The SPR peak due to core-shell NCs appeared at 541 nm [40]. Thus there was a shift to the longer wavelength i.e.…”

Section: Surface Plasmon Studies Of Aunps and Sio 2 @Au Ncsmentioning

confidence: 98%

“…The peak due to AuNPs was observed at ~522 nm due to surface plasmon resonance (SPR) absorption of NPs [40]. This peak at 522 nm is responsible for the ruby red colour displayed by conventional gold colloids.…”

Section: Surface Plasmon Studies Of Aunps and Sio 2 @Au Ncsmentioning

confidence: 99%

“…In our most recent reports, in addition to produce an excellent review on the analytical techniques involving nanoparticles and core-shell nanocomposites as new generation water remediation materials [5], we have demonstrated not only the plasmonic detection of Fe 3+ [8], F − [39] and Cd 2+ [40] but also the removal of F − using nanomaterials from aqueous media [41][42][43].…”

Section: Introductionmentioning

confidence: 99%

“…Hence, in continuation of our interest in the application of nanomaterials [3,8,39,[40][41][42][43][44], we report novel, efficient, rapid and visual detection method for Pb 2+ ion based on the development of sensitive AuNPs and SiO 2 @Au nanocomposites (SiO 2 @Au NCs). Thus the present work describes the strategy for preparing citrate capped AuNPs and SiO 2 @Au NCs based on a multistep process via a sol-gel reaction [45,46] in which the AuNPs were modified with silica and their applications for the detection of Pb 2+ in aqueous samples.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Trace colorimetric detection of Pb 2+ using plasmonic gold nanoparticles and silica–gold nanocomposites

Thatai

Khurana

Prasad

et al. 2016

Microchemical Journal

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Section: Resultsmentioning

confidence: 99%

Section: Surface Plasmon Studies Of Aunps and Sio 2 @Au Ncsmentioning

confidence: 98%

Section: Surface Plasmon Studies Of Aunps and Sio 2 @Au Ncsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Trace colorimetric detection of Pb 2+ using plasmonic gold nanoparticles and silica–gold nanocomposites

Thatai

Khurana

Prasad

et al. 2016

Microchemical Journal

Self Cite

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3D Microfluidic Surface‐Enhanced Raman Spectroscopy (SERS) Chips Fabricated by All‐Femtosecond‐Laser‐Processing for Real‐Time Sensing of Toxic Substances

Bai

Serien

et al. 2018

Adv Funct Materials

133

101

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A novel all-femtosecond-laser-processing technique is proposed for the fabrication of 2D periodic metal nanostructures inside 3D glass microfluidic channels, which have applications to real-time surface-enhanced Raman spectroscopy (SERS). In the present study, 3D glass microfluidic channels are fabricated by femtosecond-laser-assisted wet etching. This is followed by the space-selective formation of Cu-Ag layered thin films inside the microfluidic structure via femtosecond laser direct writing ablation and electroless metal plating. The Cu-Ag films are subsequently nanostructured by irradiation with linearly polarized beams to form periodic surface structures. This work demonstrates that a double exposure to laser beams having orthogonal polarization directions can generate arrays of layered Cu-Ag nanodots with dimensions as small as 25% of the laser wavelength. The resulting SERS microchip is able to detect Rhodamine 6G, exhibiting an enhancement factor of 7.3 × 10 8 in conjunction with a relative standard deviation of 8.88%. This 3D microfluidic chip is also found to be capable of the real-time SERS detection of Cd 2+ ions at concentrations as low as 10 ppb in the presence of crystal violet. This technique shows significant promise for the fabrication of high performance microfluidic SERS platforms for the real-time sensing of toxic substances with ultrahigh sensitivity.

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Facile synthesis of neodymium vanadate nanoribbons and its application to highly efficient determination of cadmium ions

Cong,

Wang,

Feng

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUNDCadmium ions may be discarded to the environment with living organisms from fossil fuel combustion, phosphate fertilizer and battery industries. It is urgent and essential to develop a sensitive and rapid method for monitoring Cd2+ level in aquatic environments and biological systems. Neodymium vanadate possesses good catalytic performance for the electrocatalysis of heavy metal ions. Single crystalline Nd vanadate nanoribbons were obtained by a facile approach and used as electrode materials for electrochemical detection of Cd2+.RESULTSThe Nd nanoribbons with tetragonal NdVO4 phase possess length, width and thickness of longer than 10 μm, 200 nm to 1.5 μm and 50 nm, respectively. Nd vanadate nanoribbons can serve as a good electron transfer interface. An anodic peak is located at +0.56 V at the Nd vanadate nanoribbon‐modified electrode in 0.1 mol L−1 KCl electrolyte containing 1 mmol L−1 Cd2+ by square wave voltammetry technique. The Nd vanadate nanoribbon‐modified electrode exhibits a linear range of 0.01–1000 μmol L−1 and a detection limit of 0.29 nmol L−1, with good stability, reproducibility and selectivity for Cd2+ detection.CONCLUSIONThe optimal measurement conditions including the pH value of the KCl solution, deposition time, deposition potential and standing time, which are pH 1, 180 s, −1.0 V and 60 s, respectively. The Nd vanadate nanoribbon‐modified electrode shows great application potential for detecting heavy metal ions in liquid environments. © 2023 Society of Chemical Industry.

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Plasmonic detection of Cd 2+ ions using surface-enhanced Raman scattering active core–shell nanocomposite

Cited by 43 publications

References 62 publications

Trace colorimetric detection of Pb 2+ using plasmonic gold nanoparticles and silica–gold nanocomposites

Trace colorimetric detection of Pb 2+ using plasmonic gold nanoparticles and silica–gold nanocomposites

3D Microfluidic Surface‐Enhanced Raman Spectroscopy (SERS) Chips Fabricated by All‐Femtosecond‐Laser‐Processing for Real‐Time Sensing of Toxic Substances

Facile synthesis of neodymium vanadate nanoribbons and its application to highly efficient determination of cadmium ions

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