Article
Chemistry, Analytical
Yurong Zhuang, Chenchen Wang, Yong Wang, Yuhui Chen, Songqin Liu, Wei Wei
Summary: It was found for the first time that vanillin and TMB can reduce Tollens' reagent to different types of Ag nanoparticles. Based on this, a dual-mode detection method for vanillin was designed using colorimetry and SERS. This method allows for rapid, visual and highly sensitive detection of vanillin.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Multidisciplinary
Soohyun Lee, Insub Jung, Jiwoong Son, Sungwoo Lee, Minsun Park, Ji-Eun Kim, Woocheol Park, Jaewon Lee, Jwa-Min Nam, Sungho Park
Summary: We report a synthetic approach for the fabrication of intertwined heterometallic nanorings, in which three differently sized metal rings overlap concentrically. The synthetic method allows control over the core ring component and tunable gap distance. The narrow circular nanogaps between inner and outer Au rings enhance electromagnetic near-field, enabling surface-enhanced Raman scattering at the single-particle level. In particular, when the middle ring component is Pt, the in situ SERS measurement of electrochemical reactions on Pt domains can be monitored due to the near-field focusing assisted by plasmonic Au nanorings.
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, Analytical
Tao Xie, Pan Li, Jiazheng Wang, Ronglu Dong, Liangbao Yang
Summary: The catassembly method allows for the rapid and simple self-assembly of highly repeatable large-scale multilayers with small nanoparticles. The plasmonic multilayers formed using this method demonstrate high sensitivity and stability for SERS sensing applications.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Yufeng Wang, Mingqiang Zou, Yan Chen, Fang Tang, Jianjun Dai, Yong Jin, Cong Wang, Feng Xue
Summary: In this study, a SERS-ICA method was developed for rapid, quantitative, and ultrasensitive detection of sulfamethazine residue in milk. The method showed high sensitivity and accuracy, and the detection process could be completed within a short time. The results suggest that this method has the potential to be used in point-of-care testing.
Article
Nanoscience & Nanotechnology
Yuexing Gu, Yan Li, Shengjie Ge, Wenbo Lu, Yu Mao, Miao Chen, Yayun Qian
Summary: This study constructed a surface-enhanced Raman spectroscopy (SERS) biosensor based on functionalized Au-Si nanocone arrays (Au-SiNCA) using a dual signal amplification strategy (SDA-CHA) to evaluate telomerase activity during epithelial-mesenchymal transition (EMT) in laryngeal carcinoma (LC). Labeled probes (Au-AgNRs@4-MBA@H1) and capture substrates (Au-SiNCA@H2) were prepared by modifying hairpin DNA and Raman signal molecules. Telomerase activity in peripheral mononuclear cells (PMNC) could be successfully detected with a limit of detection (LOD) as low as 10-6 IU/mL. The results of this scheme were highly consistent with the ELISA scheme, confirming its accuracy.
INTERNATIONAL JOURNAL OF NANOMEDICINE
(2023)
Article
Chemistry, Multidisciplinary
Brinton King Eldridge, Saghar Gomrok, James W. Barr, Elise Anne Chaffin, Lauren Fielding, Christian Sachs, Katie Stickels, Paiton Williams, Yongmei Wang
Summary: Gap-enhanced Raman tags are a new type of optical probe that utilize the strong electric field inside the gap between two plasmonic metals to enhance the surface-enhanced Raman scattering response. Our study investigated Au@SiO22@Au nanoparticles with varying shell and gap thicknesses and found that the near-field enhancement spectra inside the gap were stronger than on the outer surface of the nanoparticle. We also discovered that a thin shell combined with a thin gap produced the greatest near-field enhancement.
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, Analytical
Ruipeng Chen, Shuang Li, Yunfeng Sun, Bingyang Huo, Yating Xia, Yingkai Qin, Shuning Li, Baodi Shi, Defu He, Jun Liang, Zhixian Gao
Summary: The study describes the design and fabrication of a SERS aptasensor for simultaneous detection of ZEN and OTA in wheat and corn samples, achieving good detection performance with a wide linear range and low detection limits.
Article
Nanoscience & Nanotechnology
Zi-Chun Chia, Li-Xing Yang, Ting-Yu Cheng, Ya-Jyun Chen, Horng-Long Cheng, Fei-Ting Hsu, Ying-Jan Wang, Yu-Ying Chen, Tzu-Chi Huang, Yi-Syun Fang, Chih-Chia Huang
Summary: The study designed and synthesized polyaniline-containing galactosylated gold nanoparticles, which produced electromagnetic enhancement in surface-enhanced Raman scattering and could detect low concentrations of bacteria. In addition, high accumulation of the nanoparticles promoted the immune response of tumor-associated macrophages.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Environmental
Nan Huo, Dan Li, Siqing Zheng, Wei Deng
Summary: This paper presents the design of a smart film for the detection of sulfur dioxide (SO2) using chromogenic and surface-enhanced Raman scattering (SERS) sensors. The film not only allows visual discrimination of SO2, but also provides high sensitivity and accuracy for its detection.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Yi Lin, Jun Zhang, Yalan Zhang, Sai Yan, Feng Nan, Yanlong Yu
Summary: In this study, Au particles were decorated on Si, ZnO film, and ZnO nanorod arrays simultaneously by an economical method of ion sputtering, generating three types of SERS substrates for R6G detection. The experiment results showed that substrates with Au particles decorated on ZnO nanorods had the highest Raman enhancement factor. Various enhanced mechanisms, including LSPR field coupling, electron transferring induced by LSPR of Au particles, and WGM effect of the ZnO cavity, were presented.
Article
Materials Science, Composites
Wenhao Qian, Tao Song, Mao Ye, Xiaoyu Huang, Yongjun Li, Bingjie Hao
Summary: This study successfully prepared nanocomposites of nGO and gold nanoparticles, and confirmed their sensitive and efficient SERS detection performance towards p-phenylenediamine, flavin adenine dinucleotide, and crystal violet molecules. These nanocomposites exhibit good dispersity, especially suitable for SERS sensing applications in environmental and clinical samples.
COMPOSITES COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Junnan Wang, Minqiang Wang, Jindou Shi, Yun Zhou, Chen Zhang, Arshad Saleem Bhatti
Summary: Flexibility and self-cleaning are important areas of research in the development of plasma substrates in Surface-enhanced Raman scattering (SERS). This study presents a flexible composite Au@Ag/ultrathin g-C3N4/Graphene (AUG) film, based on a PDMS film, used as a highly sensitive SERS substrate for detecting rhodamine 6G (R6G) molecules. The AUG flexible composite film displayed a detection limit of 10-12 M for R6G molecules, maintained 83% of SERS activity after 10 photocatalytic cycles, and had only a 5% decrease in SERS detection performance after 30 days of storage in air. The facile fabrication process makes the AUG composite film an excellent candidate for flexible, inexpensive, and stable wearable SERS sensing systems.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Analytical
Xiaoxiao Hu, Cuilu Quan, Tiantian Ren, Linan Zhao, Yanting Shen, Yanyan Zhu, Jing Wang
Summary: A novel stimulus-responsive surface-enhanced Raman scattering (SERS) nanoprobe has been developed for sensitive glutathione (GSH) detection using manganese dioxide (MnO2) core and silver/gold nanoparticles (Ag/Au NPs). The MnO2 core acts as a scaffold to amplify the SERS signal and can be degraded in the presence of the target, significantly enhancing the nanoprobe sensitivity for GSH sensing. This sensing system offers a wide linear range and a low detection limit, and has potential applications in intracellular GSH detection and monitoring.