Article
Chemistry, Applied
Jingjing Wu, Jianfeng Xi, Haibo Chen, Sijie Li, Lei Zhang, Peng Li, Weibing Wu
Summary: Flexible and high-sensitivity two-dimensional SERS substrates based on self-assembled gold nanoflowers and silver-coated gold nanocubes were successfully developed on nanocrystalline cellulose film. The substrate could sensitively detect pesticide residues on apple surface and showed a linear relationship with pesticide concentration in the range of 10-100 mu g/L.
CARBOHYDRATE POLYMERS
(2022)
Article
Chemistry, Analytical
Ruiyuan Zhang, Liang Yu, Hongjun You, Rui Hao, Jixiang Fang
Summary: A robust and practical molecular enrichment strategy has been developed, which effectively confines analyte molecules and gold nanoparticles in a small-sized sensitive region on a needle tip. This strategy utilizes the Leidenfrost phenomenon and capillary force, enabling high sensitivity and specificity in surface-enhanced Raman scattering (SERS) detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Spectroscopy
Quanhong Ou, Biao Tang, Liqin Jiang, Mingcheng Han, Weiye Yang, Junqi Tang, Gang Liu
Summary: In this study, a super-sensitive method of surface-enhanced Raman spectroscopy (SERS) was used to detect carbosulfan residues in vegetables. It was found that carbosulfan easily decomposes into carbofuran and 3-Hydroxy carbofuran. Silver sol was prepared as the SERS substrate and a complex of carbosulfan, chromogenic agent, and sodium hydroxide was mixed with the silver sol in the best proportion for SERS spectra examination. Density functional theory calculations were used to determine the spectral peak positions of carbosulfan. The optimal mixing ratio and the detection limit of carbosulfan were investigated. The results suggest that SERS is a promising technique for detecting single-molecule pesticide residues in vegetables.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Materials Science, Multidisciplinary
Thi Huyen Trang Nguyen, Thi Mai Anh Nguyen, Cong Doanh Sai, Thi Hai Yen Le, Thi Ngoc Anh Tran, Thanh Cong Bach, Van Vu Le, Nguyen Hai Pham, An Bang Ngac, Viet Tuyen Nguyen, Thi Ha Tran
Summary: The research combined sputtering and post annealing methods to prepare gold nanoparticles with uniform distribution on cover glass substrates, and studied the effect of gold thickness on the formation of nanoparticles. The study also analyzed the impact of size, inter-distance, and morphology of gold NPs on plasmon properties using SEM and absorption spectroscopy. Different morphologies' enhancement capabilities were verified using FDTD technique, demonstrating the efficient performance of the prepared gold nanoparticles arrays as SERS substrates.
Article
Nanoscience & Nanotechnology
Jinxin Chi, Chencong Xia, Zhiyong Guo, Guihua Huang, Xucong Lin
Summary: In this study, a facile and cost-effective surface-enhanced Raman scattering (SERS) sensor with high sensitivity for the on-site rapid detection of trace molecules was developed. The sensor was prepared using a capillary-based three-dimensional network porous silica material decorated with gold nanoparticles. The material exhibited a high density of SERS enhancement sites and a hot-spot, leading to a high detection sensitivity. The sensor was successfully applied to the analysis of phosmet residues on orange peel and vegetables.
ACS APPLIED NANO MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Si-Zhe Sheng, Shi-Qiao Zheng, Xue-Fei Feng, Ling-Ran Zhou, Zhen-Chao Tao, Jian-Wei Liu
Summary: This study provides a new strategy for assembling ordered structures of gold nanoparticles using highly ordered nanowire templates to explore the ordering effect on SERS performance. The highly ordered gold nanoparticle arrays show improved detection limit and enhancement factor compared to disordered gold particles.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Kirill Khabarov, Emiliia Filalova, Messan Nouraldeen, Ekaterina Kameneva, Andrey Musaev, Sergei Tikhonov, Victor Ivanov
Summary: In this study, the influence of agglomeration degree of nanoparticles on the signal enhancement of surface-enhanced Raman spectroscopy (SERS) was investigated. It was found that structures formed mainly from non-agglomerated nanoparticles can enhance the SERS signal better. Aerosol nanoparticles modified by pulsed laser radiation show better results compared to thermally modified nanoparticles.
Article
Chemistry, Multidisciplinary
Koichiro Saito, Keegan McGehee, Yasuo Norikane
Summary: The study successfully synthesized beta-CD-capped AuNPs with diameters ranging from 24 to 85 nm using a seed-mediated growth method. Monolayers of beta-CD-capped AuNPs were fabricated via liquid-liquid interfacial self-assembly for surface-enhanced Raman scattering (SERS) applications, which showed significantly improved intensity. Additionally, the higher sensitivity of beta-CDs in detecting pyrene compared to alpha-CDs was attributed to differences in molecular recognition ability.
NANOSCALE ADVANCES
(2021)
Article
Chemistry, Analytical
Dan Liu, Haibin Tang, Yupeng Yuan, Chuhong Zhu
Summary: Surface-enhanced Raman scattering (SERS) spectroscopy provides sensitive rapid detection of molecules. A simple and effective method using seed-assisted electrodeposition is developed for fabricating a 3D SERS substrate composed of multilayer Au nanoparticles. The resulting multilayer Au nanoparticles-assembled film shows high SERS sensitivity, good spectral uniformity, and reproducibility, with a low detection limit for rhodamine 6G. Moreover, it is also effective in detecting organic pollutants such as crystal violet and methylene blue.
MICROCHEMICAL JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Shi Xuan Leong, Charlynn Sher Lin Koh, Howard Yi Fan Sim, Yih Hong Lee, Xuemei Han, Gia Chuong Phan-Quang, Xing Yi Ling
Summary: The study successfully achieves direct, label-free SERS sensing of biologically important enantiomers by synergizing asymmetric nanoporous gold (NPG) nanoparticles with electrochemical-SERS. This strategy is versatile and can be readily extended to detect various enantiomers, and allows for multiplex quantification of enantiomeric ratios with excellent predictive performance. The research offers a paradigm shift in achieving label-free chiral SERS sensing of various enantiomers.
Article
Chemistry, Multidisciplinary
Niclas S. Mueller, Emanuel Pfitzner, Yu Okamura, Georgy Gordeev, Patryk Kusch, Holger Lange, Joachim Heberle, Florian Schulz, Stephanie Reich
Summary: Research shows that plasmonic supercrystals, with a high density of hotspots, are an excellent platform for enhancing vibrational spectra by increasing the cross section of Raman scattering and infrared absorption. The study demonstrates that the intensity of surface-enhanced Raman scattering inside the crystal is uniform and predictable, with supercrystal polaritons inducing resonances in the enhanced cross section for both Raman scattering and infrared absorption. The enhancement of infrared absorption within supercrystals is attributed to the combined effects of hotspot formation and the excitation of standing polariton waves.
Article
Materials Science, Multidisciplinary
Marius Schumacher, Dorleta Jimenez de Aberasturi, Jan-Philip Merkl, Leonardo Scarabelli, Elisa Lenzi, Malou Henriksen-Lacey, Luis M. Liz-Marzan, Horst Weller
Summary: This study introduces a versatile strategy for the preparation of colloidally stable and biocompatible gold nanoparticle clusters. By tuning the ligand ratio on the surface of each nanoparticle, aggregation can be controlled. The resulting clusters exhibit enhanced surface plasmon resonances and electromagnetic hotspots for surface-enhanced Raman scattering (SERS), making them promising bioimaging agents. These clusters also demonstrate high cellular uptake and low cytotoxicity, allowing for potential applications in cellular imaging.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Analytical
Chuhong Zhu, Qiangsheng Zhao, Xiujuan Wang, Zhongbo Li, Xiaoye Hu
Summary: In this study, a functional SERS system was developed for sensitive detection of target analytes using concentration of analyte molecules on or nearby plasmonic nanostructures. The composite film of Ag-nanocubes/graphene-oxide/Au-nanoparticles on a hydrophobic surface effectively accumulated analyte molecules for enhanced SERS activity. The system showed promising applications in food safety inspection and environmental pollutant monitoring.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Wenbing Li, Xin Tong, Zhuo Yang, Jiali Zhang, Bo Liu, Chao Ping Chen
Summary: Surface-enhanced Raman scattering (SERS) has attracted significant attention as a high sensitivity analytical method for molecule detection. This study compared the performance of AuNP/SiO2/Au/Sapphire substrate and AuNP/Si substrate in detecting molecules in Raman microscopy, with the former demonstrating improved sensitivity. Simulation using the finite-difference time-domain (FDTD) method provided insights into the enhanced sensitivity of the AuNP/SiO2/Au/Sapphire substrate, suggesting optimized parameters for further research.
Article
Chemistry, Multidisciplinary
Arpad Dusa, Fani Madzharova, Janina Kneipp
Summary: SEHRS offers advantages in probing biological samples due to its surface sensitivity and complementary vibrational information. FDTD simulations reveal that the intensity of the laser field and the HRS field are important factors affecting the enhancement of SEHRS.
FRONTIERS IN CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Han Lee, Jia-Wei Yang, Jiunn-Der Liao, Jaya Sitjar, Bernard Haochih Liu, Kundan Sivashanmugan, Wei-En Fu, Guo Dung Chen
Article
Materials Science, Multidisciplinary
Kundan Sivashanmugan, Han Lee, Jiunn-Der Liao, Chen-Chu Wang, Chen-Hsueh Lin, Yuh-Shyong Yang, Jaya Sitjar
Article
Materials Science, Multidisciplinary
Kundan Sivashanmugan, Van-Huy Nguyen, Ba-Son Nguyen
Article
Chemistry, Physical
Han Lee, Jiunn-Der Liao, Yao-Sheng Guo, Yung-Der Juang
Article
Materials Science, Multidisciplinary
Ming-Xue Wei, Chao-Hui Liu, Han Lee, Bo-Wei Lee, Chun-Han Hsu, Hong-Ping Lin, Yu-Chun Wu
Article
Materials Science, Multidisciplinary
Jaya Sitjar, Ying-Chen Hou, Jiunn-Der Liao, Han Lee, Hong-Zheng Xu, Wei-En Fu, Guo Dung Chen
Article
Materials Science, Multidisciplinary
K. Bhuvaneswari, Ba-Son Nguyen, Van-Huy Nguyen, Vu-Quynh Nguyen, Quang-Hung Nguyen, G. Palanisamy, Kundan Sivashanmugan, T. Pazhanivel
Article
Materials Science, Multidisciplinary
G. Marimuthu, Ba-Son Nguyen, Van-Toan Pham, Van-Huy Nguyen, Van-Man Tran, Kundan Sivashanmugan, T. Pazhanivel
Summary: The study introduced a simple and inexpensive hydrothermal method to prepare a NiCo2O4/MWCNTs sensor, which showed the highest capacitance at 10 kHz and exhibited excellent sensitivity for NH3 gas detection at room temperature.
Article
Chemistry, Physical
Han Lee, Wen-Hao Wu, Bing-Hung Chen, Jiunn-Der Liao
Summary: This study investigated the utilization of SrO/TiO2_P catalyst in transesterification of olive oil, demonstrating high conversion efficiency and biodiesel production. The optimized SrO/TiO2_P sample, prepared through processes like dip-coating and heat treatment, showed high stability and conversion rate in the reaction process.
Review
Biophysics
Jaya Sitjar, Jiunn-Der Liao, Han Lee, Huey-Pin Tsai, Jen-Ren Wang, Ping-Yen Liu
Summary: The COVID-19 pandemic has had a significant negative impact on the global economy due to the fast transmission of the virus. Efforts are being made to minimize the impact by developing effective screening methods to identify infected individuals, especially in cases where standard nucleic acid and serological tests may not be reliable.
BIOSENSORS & BIOELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
K. Chandhirasekar, A. Thendralmanikandan, Pazhanivel Thangavelu, Ba-Son Nguyen, Trong-Anh Nguyen, Kundan Sivashanmugan, Arjunan Nareshkumar, Van-Huy Nguyen
Summary: The study successfully synthesized silver nanoparticles with larvicidal activity using extracts of Citrus medico, Tagetes lemmonii, and Tarenna asiatica. The results showed that these three plants can effectively prepare nanoparticles that inhibit the development of Aedes aegypti.
Article
Chemistry, Physical
Han Lee, Yen-Ling Peng, Liang-Ming Whang, Jiunn-Der Liao
Summary: Steel slag is a byproduct of steelmaking process, and its treatment and utilization are becoming increasingly important. Studies have shown that compacted porous steel slag discs have high phosphorous removal efficiency in water filtration, and comply with environmental standards.
Article
Engineering, Environmental
K. Bhuvaneswari, G. Palanisamy, Kundan Sivashanmugan, T. Pazhanivel, T. Maiyalagan
Summary: The study synthesized multiwall carbon nanotubes supported by zinc-oxide nanoparticles with a ZnMgAl layered-triple hydroxide hybrid via direct hydrothermal treatment. The prepared hybrid material exhibited high photocatalytic activity under visible light, with MWCNT ZnO LTH showing the highest photocatalytic degradation efficiency.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)