Noble metal-comparable SERS enhancement from semiconducting metal oxides by making oxygen vacancies

Cong, Shan; Yuan, Yinyin; Chen, Huajun; Hou, Junyu; Yang, Mei; Su, Yanli; Zhang, Yongyi; Li, Liang; Li, Qingwen; Geng, Fengxia; Zhao, Zhigang

doi:10.1038/ncomms8800

Cited by 614 publications

(553 citation statements)

References 33 publications

Supporting

Mentioning

523

Contrasting

Unclassified

Order By: Relevance

“…From porous ZnO nanosheets, [15] TiO 2 photonic microarrays, [16] CuTe quantum dots, [17] chemically etched ZnSe, [18] and single Cu 2 O superstructure particles [19] to urchin-like W 18 O 49 , [20] MoO 3−x @MoO 3 nanosheets, [21] MoO 3−x quantum dots, [22] and oxygen-incorporating MoS x O y , [23] two types of methods are generally used to improve the SERS performance of semiconductor substrates: morphology design and element doping. As an increasing number of researchers are engaging in the study of semiconductor SERS substrates, research achievements regarding semiconductor SERS substrates have grown exponentially in recent years.…”

Section: Introductionmentioning

confidence: 99%

A Novel Ultra‐Sensitive Semiconductor SERS Substrate Boosted by the Coupled Resonance Effect

et al. 2019

View full text Add to dashboard Cite

Recent achievements in semiconductor surface‐enhanced Raman scattering (SERS) substrates have greatly expanded the application of SERS technique in various fields. However, exploring novel ultra‐sensitive semiconductor SERS materials is a high‐priority task. Here, a new semiconductor SERS‐active substrate, Ta 2 O 5 , is developed and an important strategy, the “coupled resonance” effect, is presented, to optimize the SERS performance of semiconductor materials by energy band engineering. The optimized Mo‐doped Ta 2 O 5 substrate exhibits a remarkable SERS sensitivity with an enhancement factor of 2.2 × 10 7 and a very low detection limit of 9 × 10 −9 m for methyl violet (MV) molecules, demonstrating one of the highest sensitivities among those reported for semiconductor SERS substrates. This remarkable enhancement can be attributed to the synergistic resonance enhancement of three components under 532 nm laser excitation: i) MV molecular resonance, ii) photoinduced charge transfer resonance between MV molecules and Ta 2 O 5 nanorods, and iii) electromagnetic enhancement around the “gap” and “tip” of anisotropic Ta 2 O 5 nanorods. Furthermore, it is discovered that the concomitant photoinduced degradation of the probed molecules in the time‐scale of SERS detection is a non‐negligible factor that limits the SERS performance of semiconductors with photocatalytic activity.

show abstract

Section: Introductionmentioning

confidence: 99%

A Novel Ultra‐Sensitive Semiconductor SERS Substrate Boosted by the Coupled Resonance Effect

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Once these oxygen vacancies are removed, the SPR effect of the material will disappear. For example, oxygen vacancies-rich W 18 O 49 possesses the highest EF in the reported non-noble-metal SERS materials at present24, but its SPR activity will be drastically reduced when it is exposed to air for several days even at room temperature2526. Therefore, the discovery of robust SERS substrate materials with low cost and high stability is very meaningful both in basic research and practical applications.…”

mentioning

confidence: 99%

A metallic molybdenum dioxide with high stability for surface enhanced Raman spectroscopy

et al. 2017

View full text Add to dashboard Cite

Compared with noble metals, semiconductors with surface plasmon resonance effect are another type of SERS substrate materials. The main obstacles so far are that the semiconducting materials are often unstable and easy to be further oxidized or decomposed by laser irradiating or contacting with corrosive substances. Here, we report that metallic MoO2 can be used as a SERS substrate to detect trace amounts of highly risk chemicals including bisphenol A (BPA), dichloropheno (DCP), pentachlorophenol (PCP) and so on. The minimum detectable concentration was 10−7 M and the maximum enhancement factor is up to 3.75 × 106. To the best of our knowledge, it may be the best among the metal oxides and even reaches or approaches to Au/Ag. The MoO2 shows an unexpected high oxidation resistance, which can even withstand 300 °C in air without further oxidation. The MoO2 material also can resist long etching of strong acid and alkali.

show abstract

Section: Design Strategies For Improving Sers Activity Of Noble‐metamentioning

confidence: 99%

Noble‐Metal‐Free Materials for Surface‐Enhanced Raman Spectroscopy Detection

Tan

Melkersson

et al. 2016

ChemPhysChem

View full text Add to dashboard Cite

Surface-enhanced Raman spectroscopy (SERS) is an attractive tool for the sensing of molecules in the fields of chemical and biochemical analysis as it enables the sensitive detection of molecular fingerprint information even at the single-molecule level. In addition to traditional coinage metals in SERS analysis, recent research on noble-metal-free materials has also yielded highly sensitive SERS activity. This Minireview presents the recent development of noble-metal-free materials as SERS substrates and their potential applications, especially semiconductors and emerging graphene-based nanostructures. Rather than providing an exhaustive review of this field, possible contributions from semiconductor substrates, characteristics of graphene enhanced Raman scattering, as well as effect factors such as surface plasmon resonance, structure and defects of the nanostructures that are considered essential for SERS activity are emphasized. The intention is to illustrate, through these examples, that the promise of noble-metal-free materials for enhancing detection sensitivity can further fuel the development of SERS-related applications.

show abstract

Noble metal-comparable SERS enhancement from semiconducting metal oxides by making oxygen vacancies

Cited by 614 publications

References 33 publications

A Novel Ultra‐Sensitive Semiconductor SERS Substrate Boosted by the Coupled Resonance Effect

A Novel Ultra‐Sensitive Semiconductor SERS Substrate Boosted by the Coupled Resonance Effect

A metallic molybdenum dioxide with high stability for surface enhanced Raman spectroscopy

Noble‐Metal‐Free Materials for Surface‐Enhanced Raman Spectroscopy Detection

Contact Info

Product

Resources

About