Synthesis and superior SERS performance of porous octahedron Cu2O with oxygen vacancy derived from MOFs

Yang, Yuehong; Gao, Xinna; Yang, Sijun; Shen, Yuhua

doi:10.1007/s10853-021-05946-7

Cited by 13 publications

(13 citation statements)

References 26 publications

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“…Following this, thermal treatment has also been found effective in inducing OV-related SERS in other typical metal oxides. Yang et al 27 proposed the fabrication of Cu2O octahedrons with oxygen-vacancies by calcining Cu-MOFs in reductive atmosphere, which facilitated stronger selective adsorption towards sulfhydryl groups, achieving an LOD of 5 × 10 -10 M for 4-MPY. In addition to thermal treatment, irradiation-induced vacancies are also widely reported in materials engineering [28][29][30] .…”

Section: Vacanciesmentioning

confidence: 99%

Defect engineering in semiconductor-based SERS

2022

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Section: Vacanciesmentioning

confidence: 99%

Defect engineering in semiconductor-based SERS

2022

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“…For the detection of plastic contamination, we have discussed the capabilities of SERS for detecting particles smaller than 1 μm 62,[114][115][116] and plastic particles in various types of water, such as tap, river and sea water. 114,116 superhydrophobic NP/glass microfiber filters, 71 MOFs, 121,123 CNCregulated nanostructures 122 and NWs/pyramidal PDMS structures. 51 Last, in discussing SERS detection of pesticides, we have covered fungicides, herbicides and insecticides, and discussed methods that allow for the detection of multiple pesticides on the same substrate.…”

Section: Discussionmentioning

confidence: 99%

“…Yang et al. reported an approach involving the fabrication of porous octahedral Cu 2 O onto Cu MOFs to create a novel SERS substrate 123 . SERS sensitivity was notably high for the detection of MB with this newly developed substrate, given that concentrations as low as 5 × 10 ‐9 M were detected.…”

Section: Analytes Of Interestmentioning

confidence: 99%

Applications of surface‐enhanced Raman spectroscopy in environmental detection

Terry

Sanders

Potoff

et al. 2022

Analytical Science Advances

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As the human population grows, the anthropogenic impacts from various agricultural and industrial processes produce unwanted contaminants in the environment. The accurate, sensitive and rapid detection of such contaminants is vital for human health and safety. Surface-enhanced Raman spectroscopy (SERS) is a valuable analytical tool with wide applications in environmental contaminant monitoring. The aim of this review is to summarize recent advancements within SERS research as it applies to environmental detection, with a focus on research published or accessible from January 2021 through December 2021 including early-access publications. Our goal is to provide a wide breadth of information that can be used to provide background knowledge of the field, as well as inform and encourage further development of SERS techniques in protecting environmental quality and safety. Specifically, we highlight the characteristics of effective SERS nanosubstrates, and explore methods for the SERS detection of inorganic, organic, and biological contaminants including heavy metals, pharmaceuticals, plastic particles, synthetic dyes, pesticides, viruses, bacteria and mycotoxins. We also discuss the current limitations of SERS technologies in environmental detection and propose several avenues for future investigation. We encourage researchers to fill in the identified gaps so that SERS can be implemented in a real-world environment more effectively and efficiently, ultimately providing reliable and timely data to help and make science-based strategies and policies to protect environmental safety and public health.

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“…Furthermore, AuNB offer a sharp plasma resonance peak and a strong interparticle near-field coupling effect, contributing to their excellent performance in biosensing and SERS applications. There has been interest in cuprous oxide (Cu 2 O) octahedra, as a p-type semiconductor, due to their narrow direct band gap of 2.2 eV and high-energy photoinduced electrons, which are specifically tailored for magnifying the Raman signal [ 22 – 24 ]. Under the near-field electromagnetic enhancement mechanism (EM), the E-field increases with decreasing interparticle distance.…”

Section: Introductionmentioning

confidence: 99%

A pump-free and high-throughput microfluidic chip for highly sensitive SERS assay of gastric cancer-related circulating tumor DNA via a cascade signal amplification strategy

Cao

Hua

et al. 2022

J Nanobiotechnol

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Circulating tumour DNA (ctDNA) has emerged as an ideal biomarker for the early diagnosis and prognosis of gastric cancer (GC). In this work, a pump-free, high-throughput microfluidic chip coupled with catalytic hairpin assembly (CHA) and hybridization chain reaction (HCR) as the signal cascade amplification strategy (CHA–HCR) was developed for surface-enhanced Raman scattering (SERS) assays of PIK3CA E542K and TP53 (two GC-related ctDNAs). The chip consisted of six parallel functional units, enabling the simultaneous analysis of multiple samples. The pump-free design and hydrophilic treatment with polyethylene glycol (PEG) realized the automatic flow of reaction solutions in microchannels, eliminating the dependence on external heavy-duty pumps and significantly improving portability. In the reaction region of the chip, products generated by target-triggered CHA initiated the HCR, forming long nicked double-stranded DNA (dsDNA) on the Au nanobowl (AuNB) array surface, to which numerous SERS probes (Raman reporters and hairpin DNA-modified Cu2O octahedra) were attached. This CHA–HCR strategy generated numerous active “hot spots” around the Cu2O octahedra and AuNB surface, significantly enhancing the SERS signal intensity. Using this chip, an ultralow limit of detection (LOD) for PIK3CA E542K (1.26 aM) and TP53 (2.04 aM) was achieved, and the whole process was completed within 13 min. Finally, a tumour-bearing mouse model was established, and ctDNA levels in mouse serum at different stages were determined. To verify the experimental accuracy, the gold-standard qRT–PCR assay was utilized, and the results showed a high degree of consistency. Thus, this rapid, sensitive and cost-effective SERS microfluidic chip has potential as an ideal detection platform for ctDNA monitoring.

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Synthesis and superior SERS performance of porous octahedron Cu2O with oxygen vacancy derived from MOFs

Cited by 13 publications

References 26 publications

Defect engineering in semiconductor-based SERS

Defect engineering in semiconductor-based SERS

Applications of surface‐enhanced Raman spectroscopy in environmental detection

A pump-free and high-throughput microfluidic chip for highly sensitive SERS assay of gastric cancer-related circulating tumor DNA via a cascade signal amplification strategy

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