Tunable 3D light trapping architectures based on self-assembled SnSe2 nanoplate arrays for ultrasensitive SERS detection

2019 ◽  
Vol 7 (33) ◽  
pp. 10179-10186 ◽  
Author(s):  
Weiwei Li ◽  
Lei Xiong ◽  
Nianci Li ◽  
Shuo Pang ◽  
Guoliang Xu ◽  
...  
Keyword(s):  
High Performance ◽  
Light Trapping ◽  
Sers Substrates ◽  
Sers Detection ◽  
Self Assembled

We demonstrate tunable 3D light trapping (up to ∼96%) architectures based on the SnSe2 nanoplate arrays (NPAs) via self-assembled growth and high performance (EF: 6.33 × 106, LOD: 1 × 10−12 M) SERS substrates based on SnSe2 NPAs.

scholarly journals Facile Detection and Quantification of Acetamiprid Using a Portable Raman Spectrometer Combined with Self-Assembled Gold Nanoparticle Array

Chemosensors ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 327
Author(s):  
Panxue Wang ◽  
Yan Sun ◽  
Li Wang ◽  
Xiang Li ◽  
Miaomiao Liu ◽  
...  
Keyword(s):  
Gold Nanoparticle ◽  
Correlation Coefficients ◽  
Nanoparticle Array ◽  
Sers Signal ◽  
Sers Substrates ◽  
Specificity And Sensitivity ◽  
Exciting Opportunity ◽  
Sers Detection ◽  
Self Assembled ◽  
Detection And Quantification

Rapid and facile determination of pesticides is critically important in food and environmental monitoring. This study developed a self-assembled gold nanoparticle array based SERS method for highly specific and sensitive detection of acetamiprid, a neonicotinoid pesticide that used to be difficult in SERS analysis due to its low affinity with SERS substrates. SERS detection and quantification of acetamiprid was conducted with self-assembled gold nanoparticle arrays at the interface of chloroform and water as the enhancing substrate. Since targets dissolved in chloroform (organic phase) also have access to the hot-spots of Au NP array, the developed method exhibited good sensitivity and specificity for acetamiprid determination. Under the optimal conditions, SERS intensities at Raman shifts of 631 cm−1 and 1109 cm−1 displayed a good linear relationship with the logarithm concentration of acetamiprid in the range of 5.0 × 10−7 to 1.0 × 10−4 mol/L (0.11335 ppm to 22.67 ppm), with correlation coefficients of 0.97972 and 0.97552, respectively. The calculated LOD and LOQ of this method were 1.19 × 10−7 mol/L (0.265 ppb) and 2.63 × 10−7 mol/L (0.586 ppb), respectively, using SERS signal at 631 cm−1, and 2.95 × 10−7 mol/L (0.657 ppb) and 3.86 × 10−7 mol/L (0.860 ppb) using SERS signal at 1109 cm−1, respectively. Furthermore, the developed SERS method was successfully applied in determining acetamiprid on the surface of apple and spinach. This method offers an exciting opportunity for rapid detection of acetamiprid and other organic pesticides considering its advantages of simple preparation process, good specificity and sensitivity, and short detection time (within 1 h).

scholarly journals Hydrophobic multiscale cavities for high-performance and self-cleaning surface-enhanced Raman spectroscopy (SERS) sensing

Nanophotonics ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Xiaofei Zhao ◽  
Chundong Liu ◽  
Jing Yu ◽  
Zhen Li ◽  
Lu Liu ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
High Performance ◽  
Light Trapping ◽  
Organic Pollutant ◽  
Surface Enhanced Raman Spectroscopy ◽  
Sers Substrates ◽  
Highly Sensitive ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Self Cleaning

AbstractCavity array, with excellent optical capture capability, has received increasing attention for the surface-enhanced Raman spectroscopy (SERS)-active substrates. Here, we proposed molybdenum disulfide (MoS2) nanocavities growing on pyramid Si (PSi) composed of in situ reduced Au nanoparticles (AuNPs), which can form the multiscale cavities (MSCs), and is facile for the couple of the plasmon. We demonstrated that the PSi/MoS2/Au MSCs can serve as highly sensitive, uniform, and stable SERS substrates for rhodamine 6G (R6G), crystal violet, and adenosine triphosphate detection, benefiting from the synergistic effect of the enhanced light trapping and the effective plasmonic couple. The couple of the plasmon in the MSCs is evidently proved by finite-difference time domain simulation, showing the strong electromagnetic field is located around the cavity wall. Moreover, the excellent hydrophobicity of the PSi/MoS2/AuNPs substrate endows it with the ability for the directional monitoring of organic pollutant in a mixture of oil and water. Finally, we demonstrated the MSCs with outstanding photocatalytic performance could achieve the renewable utilization by self-cleaning, which was attributed to the fast electron transfer and effective light absorption. The proposed PSi/MoS2/AuNPs MSC represents a robust mean using the plasmonic metal/semiconductor heterostructure for high-performance SERS sensors and photodegradation.

Self-assembled vertically aligned silver nanorod arrays prepared by evaporation-induced method as high-performance SERS substrates

2020 ◽  
Vol 55 (28) ◽  
pp. 14019-14030 ◽  
Author(s):  
Xin Li ◽  
Xiangdong Tian ◽  
Siying Liu ◽  
Chen Wu ◽  
Yu Han ◽  
...  
Keyword(s):  
High Performance ◽  
Nanorod Arrays ◽  
Sers Substrates ◽  
Vertically Aligned ◽  
Self Assembled

scholarly journals 2D MoS2 Encapsulated Silicon Nanopillar Array with High-Performance Light Trapping Obtained by Direct CVD Process

Crystals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 267
Author(s):  
Minyu Bai ◽  
Zhuoman Wang ◽  
Jijie Zhao ◽  
Shuai Wen ◽  
Peiru Zhang ◽  
...  
Keyword(s):  
Silicon Substrate ◽  
High Performance ◽  
Low Cost ◽  
Light Trapping ◽  
Incident Light ◽  
Single Layer ◽  
Chemical Vapor ◽  
Optoelectronic Device ◽  
Planar Silicon ◽  
Shortwave Infrared

Weak absorption remains a vital factor that limits the application of two-dimensional (2D) materials due to the atomic thickness of those materials. In this work, a direct chemical vapor deposition (CVD) process was applied to achieve 2D MoS2 encapsulation onto the silicon nanopillar array substrate (NPAS). Single-layer 2D MoS2 monocrystal sheets were obtained, and the percentage of the encapsulated surface of NPAS was up to 80%. The reflection and transmittance of incident light of our 2D MoS2-encapsulated silicon substrate within visible to shortwave infrared were significantly reduced compared with the counterpart planar silicon substrate, leading to effective light trapping in NPAS. The proposed method provides a method of conformal deposition upon NPAS that combines the advantages of both 2D MoS2 and its substrate. Furthermore, the method is feasible and low-cost, providing a promising process for high-performance optoelectronic device development.

Maximizing piezoelectricity by self-assembled highly porous perovskite–polymer composite films to enable the internet of things

2020 ◽  
Vol 8 (27) ◽  
pp. 13619-13629 ◽  
Author(s):  
Asif Abdullah Khan ◽  
Md Masud Rana ◽  
Guangguang Huang ◽  
Nanqin Mei ◽  
Resul Saritas ◽  
...  
Keyword(s):  
Internet Of Things ◽  
Polymer Composite ◽  
High Performance ◽  
Composite Films ◽  
The Internet ◽  
Next Generation ◽  
Self Assembled ◽  
Self Powered ◽  
The Internet Of Things ◽  
Highly Porous

A high-performance perovskite/polymer piezoelectric nanogenerator for next generation self-powered wireless micro/nanodevices.

Versatile self-assembled MXene-Au nanocomposites for SERS detection of bacteria, antibacterial and photothermal sterilization

2021 ◽  
pp. 131914
Author(s):  
Zizhen Yu ◽  
Li Jiang ◽  
Rongyang Liu ◽  
Weidan Zhao ◽  
Ziheng Yang ◽  
...  
Keyword(s):  
Sers Detection ◽  
Self Assembled

Self-assembled ZnO-carbon dots anode materials for high performance nickel-zinc alkaline batteries

2021 ◽  
pp. 130660
Author(s):  
Ji-Shi Wei ◽  
Ze-Yang Zhu ◽  
Xiao Zhao ◽  
Tian-Bing Song ◽  
Jian-Hang Huang ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Anode Materials ◽  
High Performance ◽  
Alkaline Batteries ◽  
Nickel Zinc ◽  
Self Assembled
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