SERS performance of cubic-shaped gold nanoparticles for environmental monitoring

Parambath, Javad B. M.; Kim, Gwangmin; Cui, Han; Mohamed, Ahmed A.

doi:10.1007/s11164-022-04913-4

Cited by 8 publications

(4 citation statements)

References 44 publications

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“…The values of AEF for the AuNB supports are similar to those reported for cubic gold nanoparticles and slightly higher compared to that of gold nanoparticle assemblies . The latter are similar to AuNSs on GO supports.…”

Section: Resultssupporting

confidence: 82%

“…The AEF value obtained for AuNBs@GONaOH is the highest and is equal to 5.13 × 10 8 . The limit of detection (LOD) can be calculated as 3 times value of the noise of the blank spectrum divided by the value of the slope of the calibration plot . Such estimation gives LOD values in the nanomolar range for the supports involving AuNBs and about 10 or 100 times worse values for AuNUs and AuNSs, respectively (Table S1).…”

Section: Resultsmentioning

confidence: 99%

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Template-Free Synthesized Gold Nanobowls Composed with Graphene Oxide for Ultrasensitive SERS Platforms

Kasztelan,

Zoladek,

Wieczorek

et al. 2023

J. Phys. Chem. C

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Engineering of plasmonic properties of gold nanostructures expands the field of their applications from photocatalysis and photothermal effects to ultrasensitive surface-enhanced Raman spectroscopy (SERS). The known methods of preparation of gold nanobowls involve the deposition of gold layer on polymers or silicon nanotemplates and the removal of the top layer of gold together with the template. Such gold nanobowls are characterized by very broad plasmonic bands due to the plasmon hybridization. The sharp edges on the top of nanobowls are potential sources of the strong electromagnetic field beneficial for SERS. We present a novel template-free synthesis of gold nanobowls (AuNBs). The AuNB layers are deposited on graphene oxide (GO) layers. We compare AuNBs with gold nanospheres (AuNSs) and gold nanourchins (AuNUs) having similar size. The gold nanoparticles are combined with pristine GO or graphene oxide conditioned in ammonia (GONH 3 ) or graphene oxide conditioned in sodium hydroxide (GONaOH). The SERS properties of the hybrid supports were studied using rhodamine 6G (R6G) as the SERS probe. The 633 nm laser line was used, which falls out of the molecular resonance with R6G. The results indicate that AuNBs show largely higher enhancement factors when compared to AuNUs and AuNSs. Furthermore, the GO materials are able to modify the SERS enhancement by 1 order of magnitude. We explain the influence of the GO material by three factors: (1) enabling or disabling the charge transfer between gold and R6G, which is crucial for the chemical part of SERS enhancement; (2) causing the aggregation of gold nanoparticles and formation of hot spots; (3) dipole contribution to the electromagnetic enhancement through the abundance of polar groups on the surface.

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Section: Resultssupporting

confidence: 82%

Section: Resultsmentioning

confidence: 99%

Template-Free Synthesized Gold Nanobowls Composed with Graphene Oxide for Ultrasensitive SERS Platforms

Kasztelan,

Zoladek,

Wieczorek

et al. 2023

J. Phys. Chem. C

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“…Therefore, SERS is known as a powerful technique with high efficiency to enhance the Raman signal of chemical and biological species, and is capable of observing and identifying very low concentration of molecules, which paves the way for single-molecule sensing [ 90 , 91 ]. Due to the high sensitivity of SERS-based assays, this technique can be extensively used for detection of very low quantities of desired analytes in medical diagnoses [ 92 , 93 ], the food industry [ 94 , 95 ], and environmental monitoring [ 96 , 97 ]. SERS-based detections can be performed in two formats, direct and indirect.…”

Section: Surface-enhanced Raman-scattering-based Optical Biosensorsmentioning

confidence: 99%

Recent Progresses in Optical Biosensors for Interleukin 6 Detection

Majdinasab,

Lamy de la Chapelle,

Marty

2023

Biosensors

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Interleukin 6 (IL-6) is pleiotropic cytokine with pathological pro-inflammatory effects in various acute, chronic and infectious diseases. It is involved in a variety of biological processes including immune regulation, hematopoiesis, tissue repair, inflammation, oncogenesis, metabolic control, and sleep. Due to its important role as a biomarker of many types of diseases, its detection in small amounts and with high selectivity is of particular importance in medical and biological fields. Laboratory methods including enzyme-linked immunoassays (ELISAs) and chemiluminescent immunoassays (CLIAs) are the most common conventional methods for IL-6 detection. However, these techniques suffer from the complexity of the method, the expensiveness, and the time-consuming process of obtaining the results. In recent years, too many attempts have been conducted to provide simple, rapid, economical, and user-friendly analytical approaches to monitor IL-6. In this regard, biosensors are considered desirable tools for IL-6 detection because of their special features such as high sensitivity, rapid detection time, ease of use, and ease of miniaturization. In this review, current progresses in different types of optical biosensors as the most favorable types of biosensors for the detection of IL-6 are discussed, evaluated, and compared.

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“…Qi et al [ 16 ] utilized gold nanostars to prepare a uniform SERS substrate with PC membrane, which exhibited excellent sensitivity for detecting R6G at concentrations as low as 1 × 10 −10 M and achieved an enhancement factor of approximately 3.70 × 10 5 . Javad et al [ 17 ] developed gold-aryl nanocubes for SERS analysis, achieving detection limits of 10 −11 M R6G. Soumya et al [ 18 ] fabricated AgNPr/ZnO NRs substrates and found that the highest SERS signal was obtained from substrates with a 1500 nm nanorod length, highlighting the importance of substrate shape and composition in improving SERS performance.…”

Section: Introductionmentioning

confidence: 99%

High-Performance Au@Ag Nanorods Substrate for SERS Detection of Malachite Green in Aquatic Products

Chen

Pan

et al. 2023

Biosensors

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In order to improve the detection performance of surface-enhanced Raman scattering (SERS), a low-cost Au@Ag nanorods (Au@Ag NRs) substrate with a good SERS enhancement effect was developed and applied to the detection of malachite green (MG) in aquaculture water and crayfish. By comparing the SERS signal enhancement effect of five kinds of Au@Ag NRs substrates with different silver layer thickness on 4-mercaptobenzoic acid (4-MBA) solution, it was found that the substrate prepared with 100 µL AgNO3 had the smallest aspect ratio (3.27) and the thickest Ag layer (4.1 nm). However, it showed a good signal enhancement effect, and achieved a detection of 4-MBA as low as 1 × 10−11 M, which was 8.7 times higher than that of the AuNRs substrate. In addition, the Au@Ag NRs substrate developed in this study was used for SRES detection of MG in crayfish; its detection limit was 1.58 × 10−9 M. The developed Au@Ag NRs sensor had the advantages of stable SERS signal, uniform size and low cost, which provided a new tool for SERS signal enhancement and highly sensitive SERS detection method development.

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SERS performance of cubic-shaped gold nanoparticles for environmental monitoring

Cited by 8 publications

References 44 publications

Template-Free Synthesized Gold Nanobowls Composed with Graphene Oxide for Ultrasensitive SERS Platforms

Template-Free Synthesized Gold Nanobowls Composed with Graphene Oxide for Ultrasensitive SERS Platforms

Recent Progresses in Optical Biosensors for Interleukin 6 Detection

High-Performance Au@Ag Nanorods Substrate for SERS Detection of Malachite Green in Aquatic Products

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