Concave gold nanoparticles on aluminum as surface enhanced Raman spectroscopy substrate for detection of thiram

Martinez-Garcia, Monica Monserrat; Pichardo‐Molina, J. L.; Arzate, N.; Alvarado‐Gil, J. J.

doi:10.1177/18479804221082778

Cited by 1 publication

(2 citation statements)

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“…The SH-β-CD@AuNPs nanomaterial substrate developed in this paper exists in colloidal form. Therefore, in this work, the chosen AEF calculation formula [ 80 , 81 , 82 , 83 ] is as follows:

where

refers to the SERS spectrum of the BTAH molecule, the reaction product of nitrite conversion of nitrate to OPD phantom.

refers to the concentration of nitrite nitrogen (mol/L) at the time of detection in the NRS of BTAH, while

refers to the NRS of BTAH.…”

Section: Resultsmentioning

confidence: 99%

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Selective and Accurate Detection of Nitrate in Aquaculture Water with Surface-Enhanced Raman Scattering (SERS) Using Gold Nanoparticles Decorated with β-Cyclodextrins

Li,

Hu,

Wang

et al. 2024

Sensors

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A surface-enhanced Raman scattering (SERS) method for measuring nitrate nitrogen in aquaculture water was developed using a substrate of β-cyclodextrin-modified gold nanoparticles (SH-β-CD@AuNPs). Addressing the issues of low sensitivity, narrow linear range, and relatively poor selectivity of single metal nanoparticles in the SERS detection of nitrate nitrogen, we combined metal nanoparticles with cyclodextrin supramolecular compounds to prepare a AuNPs substrate enveloped by cyclodextrin, which exhibits ultra-high selectivity and Raman activity. Subsequently, vanadium(III) chloride was used to convert nitrate ions into nitrite ions. The adsorption mechanism between the reaction product benzotriazole (BTAH) of o-phenylenediamine (OPD) and nitrite ions on the SH-β-CD@AuNPs substrate was studied through SERS, achieving the simultaneous detection of nitrate nitrogen and nitrite nitrogen. The experimental results show that BTAH exhibits distinct SERS characteristic peaks at 1168, 1240, 1375, and 1600 cm−1, with the lowest detection limits of 3.33 × 10−2, 5.84 × 10−2, 2.40 × 10−2, and 1.05 × 10−2 μmol/L, respectively, and a linear range of 0.1–30.0 μmol/L. The proposed method provides an effective tool for the selective and accurate online detection of nitrite and nitrate nitrogen in aquaculture water.

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“…The SH-β-CD@AuNPs nanomaterial substrate developed in this paper exists in colloidal form. Therefore, in this work, the chosen AEF calculation formula [ 80 , 81 , 82 , 83 ] is as follows:

where

refers to the SERS spectrum of the BTAH molecule, the reaction product of nitrite conversion of nitrate to OPD phantom.

refers to the concentration of nitrite nitrogen (mol/L) at the time of detection in the NRS of BTAH, while

refers to the NRS of BTAH.…”

Section: Resultsmentioning

confidence: 99%

“…The SH-β-CD@AuNPs nanomaterial substrate developed in this paper exists in colloidal form. Therefore, in this work, the chosen AEF calculation formula [80][81][82][83] is as follows:…”

Section: Calculation Of Enhancement Factorsmentioning

confidence: 99%