Surface‐enhanced Raman scattering of molecules adsorbed on Co‐doped ZnO nanoparticles

Xue, Xiangxin; Ruan, Weidong; Yang, Libin; Ji, Wei; Xie, Yunfei; Zhong, Hua; Song, Wei; Lombardi, John R.

doi:10.1002/jrs.2988

Cited by 51 publications

(54 citation statements)

References 33 publications

(32 reference statements)

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“…The two-stage thermal decomposition method of the precursor [ 83 , 84 , 85 , 86 , 87 ] and the novel two-stage self-assembly method [ 88 , 89 , 90 ] are the most common fabrication methods for 0-D ZnO nanospheres. As one of the liquid phase methods, the thermal decomposition method has the advantage of easy acquisition of highly purified nanoparticles with uniform particle size.…”

Section: Synthesis Of Zno Nanostructures As Sers Substratesmentioning

confidence: 99%

Fabrication of Semiconductor ZnO Nanostructures for Versatile SERS Application

Yang

et al. 2017

Nanomaterials

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Since the initial discovery of surface-enhanced Raman scattering (SERS) in the 1970s, it has exhibited a huge potential application in many fields due to its outstanding advantages. Since the ultra-sensitive noble metallic nanostructures have increasingly exposed themselves as having some problems during application, semiconductors have been gradually exploited as one of the critical SERS substrate materials due to their distinctive advantages when compared with noble metals. ZnO is one of the most representative metallic oxide semiconductors with an abundant reserve, various and cost-effective fabrication techniques, as well as special physical and chemical properties. Thanks to the varied morphologies, size-dependent exciton, good chemical stability, a tunable band gap, carrier concentration, and stoichiometry, ZnO nanostructures have the potential to be exploited as SERS substrates. Moreover, other distinctive properties possessed by ZnO such as biocompatibility, photocatcalysis and self-cleaning, and gas- and chemo-sensitivity can be synergistically integrated and exerted with SERS activity to realize the multifunctional potential of ZnO substrates. In this review, we discuss the inevitable development trend of exploiting the potential semiconductor ZnO as a SERS substrate. After clarifying the root cause of the great disparity between the enhancement factor (EF) of noble metals and that of ZnO nanostructures, two specific methods are put forward to improve the SERS activity of ZnO, namely: elemental doping and combination of ZnO with noble metals. Then, we introduce a distinctive advantage of ZnO as SERS substrate and illustrate the necessity of reporting a meaningful average EF. We also summarize some fabrication methods for ZnO nanostructures with varied dimensions (0–3 dimensions). Finally, we present an overview of ZnO nanostructures for the versatile SERS application.

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Section: Synthesis Of Zno Nanostructures As Sers Substratesmentioning

confidence: 99%

Fabrication of Semiconductor ZnO Nanostructures for Versatile SERS Application

Yang

et al. 2017

Nanomaterials

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“…A ZnO nanomaterial was selected as an ideal candidate platform for developing a new strategy to improve the sensitivity of semiconductor SERS technology, owing to its good optical stability and relatively high SERS activity among reported semiconductor nanomaterials . The synthesis of cubic hollow ZnO NCs follows our previous report with minor modifications .…”

Section: Figurementioning

confidence: 99%

Remarkable SERS Activity Observed from Amorphous ZnO Nanocages

et al. 2017

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Enhancement of the semiconductor–molecule interaction, in particular, promoting the interfacial charge transfer process (ICTP), is key to improving the sensitivity of semiconductor‐based surface enhanced Raman scattering (SERS). Herein, by developing amorphous ZnO nanocages (a‐ZnO NCs), we successfully obtained an ultrahigh enhancement factor of up to 6.62×105. This remarkable SERS sensitivity can be attributed to high‐efficiency ICTP within a‐ZnO NC molecule system, which is caused by metastable electronic states of a‐ZnO NCs. First‐principles density functional theory (DFT) simulations further confirmed a stronger ICTP in a‐ZnO NCs than in their crystalline counterparts. The efficient ICTP can even generate π bonding in Zn−S bonds peculiar to the mercapto molecule adsorbed a‐ZnO NCs, which has been verified through the X‐ray absorption near‐edge structure (XANES) characterization. To the best of our knowledge, this is the first time such remarkable SERS activity has been observed within amorphous semiconductor nanomaterials, which could open a new frontier for developing highly sensitive and stable SERS technology.

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“…The doping of semiconductors, which results in surface defect sites, leads to dramatic changes in their photocatalysis properties, as well as their SERS performance . Carbon‐doped TiO 2 has been synthesized and used as a self‐cleaning SERS substrate .…”

Section: Semiconductor‐enhanced Raman Scatteringmentioning

confidence: 99%

Semiconductor materials in analytical applications of surface‐enhanced Raman scattering

Zhao

Ozaki

2015

J Raman Spectroscopy

Self Cite

139

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Surface‐enhanced Raman scattering (SERS) is increasingly becoming an important analytical technique in various fields, which can mostly be attributed to the significant evolution of SERS‐active substrates. The semiconductor‐based SERS technique is particularly interesting because the inherent physicochemical properties of semiconductor materials offer several possibilities for the development and improvement of SERS‐based analytical techniques. According to the effect of the semiconductor materials in SERS, semiconductor‐based SERS techniques can be categorized into two areas: (1) semiconductor‐enhanced Raman scattering, in which a semiconductor material is directly used as a substrate for enhancing Raman signals of adsorbed molecules, and (2) semiconductor‐mediated‐enhanced Raman scattering, in which a semiconductor is employed as an ‘antenna’ or ‘trap’ to modulate the Raman enhancement originating from a metal substrate. While the theory on semiconductor‐based SERS is still incomplete and evolving, semiconductor‐based SERS techniques have already resulted in substantial progress in biological analysis, photocatalysis, solar cells, sensing, and optoelectronic devices. The aim of this review is to outline the recent progress in this emerging research field, with a special emphasis on its analytical performance and application areas. Copyright © 2015 John Wiley & Sons, Ltd.

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Surface‐enhanced Raman scattering of molecules adsorbed on Co‐doped ZnO nanoparticles

Cited by 51 publications

References 33 publications

Fabrication of Semiconductor ZnO Nanostructures for Versatile SERS Application

Fabrication of Semiconductor ZnO Nanostructures for Versatile SERS Application

Remarkable SERS Activity Observed from Amorphous ZnO Nanocages

Semiconductor materials in analytical applications of surface‐enhanced Raman scattering

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