Fabrication of Ag/ZnO nanostructures for SERS applications

Koleva, M.; Nedyalkov, N.N.; Nikov, Ru; Atanasova, G.; Karashanova, Daniela; Нуждин, В. И.; Валеев, В. Ф.; Rogov, A.M.; Степанов, А. Л.

doi:10.1016/j.apsusc.2019.145227

Cited by 35 publications

(14 citation statements)

References 38 publications

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“…where YO and YC are the yields of protons from 16 O(d,p1) 17 O obtained on the reference sample and of protons from 12 C(d,p0) 13 C obtained from the films, respectively; [C] and [O] are the 12 C areal density in the ZnO films and the 16 O areal density of the reference sample; C and O are the corresponding nuclear reaction cross sections, and Qo and Qc are the total incident beam charges for the film and reference measurements.…”

Section: Methodsmentioning

confidence: 99%

“…Near 150° where the carbon contamination is the smallest, the films grow in a polycrystalline hexagonal wurtzite structure with little evidence of texturing. ZnO crystals are known [56,57] to grow rapidly in the [0001] direction, and such growth on the (00.2) plane, which has the lowest surface energy according to the calculation of Fujimura [12][23], could increase the film growth rate.…”

Section: Preferential Growth Of Zno Filmsmentioning

confidence: 99%

“…ZnO films are typically grown by Atomic Layer Deposition (ALD) [5,6], Chemical Vapour Deposition (CVD) [7][8][9], Pulsed Laser Deposition (PLD) [10][11][12] and sol-gel methods [13,14].…”

Section: Introductionmentioning

confidence: 99%

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The carbon and hydrogen contents in ALD-grown ZnO films define a narrow ALD temperature window

Xia

Ganem

Briand

et al. 2021

Vacuum

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Zinc oxide thin films grown by atomic layer deposition have been subject to great attention over the past few years. In this work, we study ZnO films grown on Si substrates by atomic layer deposition with di-ethyl zinc (DEZ) as metal precursor and H2O or D2O water vapour as oxidant. Film composition as a function of growth temperature is studied by Ion Beam Analysis (IBA) using Rutherford Backscattering Spectrometry (RBS) to determine Zn areal density; Nuclear Reaction Analysis (NRA) for C and O areal density, and Elastic Recoil Detection Analysis (ERDA) for hydrogen areal density. The Zn/O ratio is close to 1 within a broad ALD window consistent with previous studies, however the carbon content varies substantially within this window and is minimum only within a much narrower temperature range.

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Section: Methodsmentioning

confidence: 99%

Section: Preferential Growth Of Zno Filmsmentioning

confidence: 99%

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The carbon and hydrogen contents in ALD-grown ZnO films define a narrow ALD temperature window

Xia

Ganem

Briand

et al. 2021

Vacuum

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“…[7] These substrates are important tools of the SERS-spectroscopy and comprise nanoparticles (NPs) of noble metals in colloids [8,9] or immobilized on soft materials including paper, [10][11][12] fabrics, [13,14] polymers, [15,16] plant derivatives [17,18] and the hard ones made of dielectrics [19][20][21] and semiconductors. [22][23][24] Each substrate's type has its own purpose and advantages. NPs from the colloids can be introduced into cells to analyze their molecular composition.…”

Section: Introductionmentioning

confidence: 99%

“…An abnormal increase of a Raman signal from analyte molecules is observed when they are adsorbed on or located in a close vicinity to SERS‐active substrates [7] . These substrates are important tools of the SERS‐spectroscopy and comprise nanoparticles (NPs) of noble metals in colloids [8,9] or immobilized on soft materials including paper, [10–12] fabrics, [13,14] polymers, [15,16] plant derivatives [17,18] and the hard ones made of dielectrics [19–21] and semiconductors [22–24] . Each substrate's type has its own purpose and advantages.…”

Section: Introductionmentioning

confidence: 99%

3D Silver Dendrites for Single‐molecule Imaging by Surface‐enhanced Raman Spectroscopy

et al. 2020

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Discovery of surface-enhanced Raman scattering (SERS) followed by evolution of optical systems and nanoengineering approaches has paved a path to detection of essential organic molecules on solid SERS-active substrates from solutions at concentrations attributed to single-molecule ones, i. e. below 10 À 15 M. However, in practical terms confident SERS-imaging of single molecules is still quite a challenge. In present work, we fabricated and comprehensively characterized tightly-packed 3D silver dendrites with prevalent chevron morphology that demonstrated ultrahigh sensitivity as SERS-active substrates resulted in 10 À 18 M detection limit. Using these substrates we achieved SERSimaging of single 5-thio-2-nitrobenzoic acid (TNB) molecule released from the attomolar-concentrated solution of of 5,5'dithio-bis-[2-nitrobenzoic acid] (DTNB), which is vital compound for chemical and biomedical analysis. In contrast to generally accepted belief about adsorption of only uniform monomolecular TNB layer on surface of silver nanostructures, we showed formation of a coating constituted by TNB layer and DTNB nanoclusters on the dendrites' surface at 10 À 6-10 À 12 M DTNB concentrations confirmed by presence/absence of disulfide bonds signature in the SERS-spectra and by scanning electron microscopy. DTNB concentrations below 10 À 14 M resulted in adsorption of TNB molecules in separated spots on the surface of silver nanostructures.

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Multifunction Sandwich Composite SERS Imprinted Sensor Based on ZnO/GO/Ag for Selective Detection of Cyfluthrin in River

Ren

Meng

et al. 2020

ChemistrySelect

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As a sensitive analytical measurement, surface enhanced Raman scattering (SERS) technique is gradually attracting the attention of scientists. However, traditional SERS substrate can be easily contaminated and uncomfortably applied into detection in the complex practical samples. In order to enlarge the SERS detection field, in this work, a novel multilayer nanocomposite synthesized by ZnO/GO/Ag is used as SERS substrate. This material can effectively degrade the pollutants absorbed on its surface. Furthermore, the surface of ZnO/GO/Ag is coated by molecular imprinted polymers (MIPs) to synthesize the sandwich SERS imprinted sensor (ZnO/GO/Ag‐MIPs, ZGA‐MIPs), which effectively improves the property of practical sample detection. Through the modern instruments analyzing, the ZGA‐MIPs exhibit satisfying SERS detection properties and selectivity. Importantly, ZGA‐MIPs also possess self‐cleaning property and present favorable recycling capacity. This work provides a novel approach to the SERS detection in the practical samples.

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Fabrication of Ag/ZnO nanostructures for SERS applications

Cited by 35 publications

References 38 publications

The carbon and hydrogen contents in ALD-grown ZnO films define a narrow ALD temperature window

The carbon and hydrogen contents in ALD-grown ZnO films define a narrow ALD temperature window

3D Silver Dendrites for Single‐molecule Imaging by Surface‐enhanced Raman Spectroscopy

Multifunction Sandwich Composite SERS Imprinted Sensor Based on ZnO/GO/Ag for Selective Detection of Cyfluthrin in River

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