Photochemical synthesis of ZnO@Au nanorods as an advanced reusable SERS substrate for ultrasensitive detection of light-resistant organic pollutant in wastewater

Xu, Linlin; Zhang, Hua; Tian, Yue; Jiao, Anxin; Chen, Feng; Chen, Ming

doi:10.1016/j.talanta.2018.10.060

Cited by 52 publications

(16 citation statements)

References 43 publications

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“…Photochemical synthesis permits the control of nucleation and growth rate without using organic additives. Xu et al employed laser irradiation of ZnO nanorods in HAuCl 4 to controllably grow Au NPs on the ZnO nanorods and obtained effective substrates for the ultrasensitive detection of organic pollutants in water, which could be recycled multiple times [ 45 ]. Powdered ZnO–Au nanocomposites were synthesized via hydrothermal reactions, a simple, facile, and controlled method.…”

Section: Reviewmentioning

confidence: 99%

Zinc oxide nanostructures for fluorescence and Raman signal enhancement: a review

Marica¹,

Nekvapil²,

Ştefan³

et al. 2022

Beilstein J. Nanotechnol.

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Since the initial discovery of surface-enhanced Raman scattering (SERS) and surface-enhanced fluorescence (SEF), these techniques have shown huge potential for applications in biomedicine, biotechnology, and optical sensors. Both methods rely on the high electromagnetic fields created at locations on the surface of plasmonic metal nanoparticles, depending on the geometry of the nanoparticles, their surface features, and the specific location of analyte molecules. Lately, ZnO-based nanostructures have been exploited especially as SERS substrates showing high enhancement factors and increased charge transfer effect. Additionally, applications focused on enhancing the fluorescence of analyte molecules as well as on tuning the photoluminescence properties of ZnO nanostructures through combination with metal nanoparticles. This review covers the major recent results of ZnO-based nanostructures used for fluorescence and Raman signal enhancement. The broad range of ZnO and ZnO–metal nanostructures synthesis methods are discussed, highlighting low-cost methods and the recyclability of ZnO-based nanosubstrates. Also, the SERS signal enhancement by ZnO-based nanostructures and the influences of lattice defects on the SERS signal are described. The photoluminescence enhancement of ZnO in the presence of noble metal nanoparticles and the molecular fluorescence enhancement in the presence of ZnO alone and in combination with metal nanoparticles are also reviewed.

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Section: Reviewmentioning

confidence: 99%

Zinc oxide nanostructures for fluorescence and Raman signal enhancement: a review

Marica¹,

Nekvapil²,

Ştefan³

et al. 2022

Beilstein J. Nanotechnol.

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“…Noble metallic NPs, especially those made of gold and silver, are among the best substrates for SERS [ 147 ]. For example, Xu et al deposited Au NPs, synthesized via a photochemical process, on the surface of zinc oxide nanorods (ZnO NRs) to form ZnO@Au NRs as a substrate for SERS in the detection of methylene blue to a detection limit as low as 0.8 μg L −1 , demonstrating their potential to detect organic pollutants in wastewater [ 188 ]. Similarly, Zhou et al used a 6-day sunlight exposure to produce Au nanosheets for SERS applications.…”

Section: Applications Of Photochemically Produced Ag Nps and Au Npsmentioning

confidence: 99%

Photochemical Synthesis of Gold and Silver Nanoparticles—A Review

et al. 2021

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Nanomaterials have supported important technological advances due to their unique properties and their applicability in various fields, such as biomedicine, catalysis, environment, energy, and electronics. This has triggered a tremendous increase in their demand. In turn, materials scientists have sought facile methods to produce nanomaterials of desired features, i.e., morphology, composition, colloidal stability, and surface chemistry, as these determine the targeted application. The advent of photoprocesses has enabled the easy, fast, scalable, and cost- and energy-effective production of metallic nanoparticles of controlled properties without the use of harmful reagents or sophisticated equipment. Herein, we overview the synthesis of gold and silver nanoparticles via photochemical routes. We extensively discuss the effect of varying the experimental parameters, such as the pH, exposure time, and source of irradiation, the use or not of reductants and surfactants, reagents’ nature and concentration, on the outcomes of these noble nanoparticles, namely, their size, shape, and colloidal stability. The hypothetical mechanisms that govern these green processes are discussed whenever available. Finally, we mention their applications and insights for future developments.

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“…Owing to its high sensitivity, excellent selectivity, reproducible ability and nondestructive data acquisition [13,14,15], SERS provides a robust and powerful detection technique for efficaciously identifying chemical and biological species in the fields of environmental monitoring [16], explosives detection [17,18] and biomedical science [19]. Thus, compared to the above mentioned analytical methods, SERS would be an excellent technique for the label-free and sensitive detection of thiram, and it would be expected to be one of the best candidates for on-site bactericide detection in real applications [12,20].…”

Section: Introductionmentioning

confidence: 99%

Mussel-Inspired Fabrication of SERS Swabs for Highly Sensitive and Conformal Rapid Detection of Thiram Bactericides

Zhang

et al. 2019

Nanomaterials

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As an important sort of dithiocarbamate bactericide, thiram has been widely used for fruits, vegetables and mature crops to control various fungal diseases; however, the thiram residues in the environment pose a serious threat to human health. In this work, silver nanoparticles (AgNPs) were grown in-situ on cotton swab (CS) surfaces, based on the mussel-inspired polydopamine (PDA) molecule and designed as highly sensitive surface-enhanced Raman scattering (SERS) swabs for the conformal rapid detection of bactericide residues. With this strategy, the obtained CS@PDA@AgNPs swabs demonstrated highly sensitive and reproducible Raman signals toward Nile blue A (NBA) probe molecules, and the detection limit was as low as 1.0 × 10−10 M. More critically, these CS@PDA@AgNPs swabs could be served as flexible SERS substrates for the conformal rapid detection of thiram bactericides from various fruit surfaces through a simple swabbing approach. The results showed that the detection limit of thiram residues from pear, grape and peach surfaces was approximately down to the level of 0.12 ng/cm2, 0.24 ng/cm2 and 0.15 ng/cm2 respectively, demonstrating a high sensitivity and excellent reliability toward dithiocarbamate bactericides. Not only could these SERS swabs significantly promote the collection efficiency of thiram residues from irregular shaped matrices, but they could also greatly enhance the analytical sensitivity and reliability, and would have great potential for the on-site detection of residual bactericides in the environment and in bioscience fields.

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Photochemical synthesis of ZnO@Au nanorods as an advanced reusable SERS substrate for ultrasensitive detection of light-resistant organic pollutant in wastewater

Cited by 52 publications

References 43 publications

Zinc oxide nanostructures for fluorescence and Raman signal enhancement: a review

Zinc oxide nanostructures for fluorescence and Raman signal enhancement: a review

Photochemical Synthesis of Gold and Silver Nanoparticles—A Review

Mussel-Inspired Fabrication of SERS Swabs for Highly Sensitive and Conformal Rapid Detection of Thiram Bactericides

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