Article
Chemistry, Physical
Yanqiu Zou, Li Jiang, Tengfei Zhai, Tingting You, Xufeng Jing, Rongyang Liu, Fanghao Li, Wei Zhou, Shangzhong Jin
Summary: High-performance enhancement of Raman scattering is achieved through hierarchical CuS microflowers, with enhancement sensitivity proved to be related to the number and spacing of CuS petals and illumination of the incident wavelength. CuS microflowers serve as a high-performance SERS platform to expand the application field of SERS.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Bixia Liang, Kaixin Chen, Haoling Chen, Wenkang Liu, Xingyu An, Jin Quan, Zongxia Mou, Ying Ma, Ping Zhou, Nan Li, Xin Cui
Summary: A sensitive and robust single-particle SERS sensing platform was developed for profiling Staphylococcus aureus (SA) in complex samples. The platform utilized hierarchical Au microparticles (HAMs) for capturing SA, followed by sandwiching the captured SA with aptamer-modified spherical Au nanoparticles (AuNPs) to enhance SERS signals. The method showed a broad linear range of SA detection and successfully detected SA in milk samples.
APPLIED SURFACE SCIENCE
(2023)
Article
Physics, Applied
Malik H. Mahmood, Ali Jaafar, Laszlo Himics, Laszlo Peter, Istvan Rigo, Shereen Zangana, Attila Bonyar, Miklos Veres
Summary: A novel platform for surface-enhanced Raman scattering (SERS) was developed by decorating diethylene glycol dimethacrylate microparticles with gold nanoparticles, resulting in significant enhancement of the Raman signal. Near-infrared excitation at 532, 633, and 785 nm exhibited the highest enhancement on the substrate, which also showed excellent temporal stability and spatial uniformity. The practical application potential of this SERS substrate was demonstrated by detecting DNA sequences.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Electrochemistry
Sheila Hernandez, Juan Perales-Rondon, Aranzazu Heras, Alvaro Colina
Summary: EC-SOERS is a new phenomenon that enhances the Raman signal during the oxidation of a metal surface. Studies show that carbonyl and carboxyl groups are necessary to observe this phenomenon, with a delocated charge being important factor. Evaluating the enhancement factors for different molecules with highly delocated charge and a carboxyl group sheds more light on the interaction of molecules with the electrochemically generated SOERS substrates.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Multidisciplinary
Xinyu Liu, Ziwei Ye, Qian Xiang, Zehong Xu, Wenhui Yue, Chunchun Li, Yikai Xu, Lingzhi Wang, Xiaoming Cao, Jinlong Zhang
Summary: Surface-enhanced Raman spectroscopy (SERS) is a powerful technique used in various research fields. Semiconductor SERS substrates, as alternatives to plasmonic metal substrates, have attractive attributes. However, they can only enhance the signals of analytes chemically adsorbed on their surface. In this study, we demonstrate the detection of non-adsorbing analytes on ZnO nanoparticles by coating them with ZIF-8 shells, which significantly enhances their electromagnetic enhancing capability and enables the detection of a wider range of non-adsorbing analytes.
Article
Chemistry, Physical
Hyun Jeong, Hyeong Chan Suh, Ga Hyun Cho, Rafael Salas-Montiel, Hayoung Ko, Ki Kang Kim, Mun Seok Jeong
Summary: In this study, a potential platform to enhance Raman scattering and increase the number of observable Raman modes in monolayer transition metal dichalcogenides (TMDs) was proposed. The platform consisted of large-scale arrays of gold micropillars (MPs), which were able to enhance the Raman intensity of TMDs and make difficult-to-detect Raman modes observable. The platform showed great industrial advantages and wide applicability due to its low cost, simple process, large controllable area, and short process time.
APPLIED SURFACE SCIENCE
(2024)
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
Lei Ouyang, Tobias Meyer-Zedler, Kel-Meng See, Wei-Liang Chen, Fan-Cheng Lin, Denis Akimov, Sadaf Ehtesabi, Martin Richter, Michael Schmitt, Yu-Ming Chang, Stefanie Grafe, Jurgen Popp, Jer-Shing Huang
Summary: This study investigates the enhancement effect of plasmonic gratings in nonlinear surface-enhanced coherent anti-Stokes Raman scattering (SECARS) using the platform of plasmonic Doppler grating (PDG). The PDGs spatially separate the input and output enhancement, allowing for observation and comparison of overall enhancement from different combinations of individual input and output beams. The results indicate that enhancement in the pump and anti-Stokes beams plays a more critical role in the overall enhancement than that in the Stokes beam.
Article
Chemistry, Physical
Ping Tang, Meishuang Xing, Liyun Zhong, Xinyue Xing, Huiyang Wang, Shengde Liu, Xiaoxu Lu, Yuwen Qin
Summary: This paper introduces different polyhedral Au nanoparticles as the core of Au@SiO2@Au and analyzes the effect of internal nanogap morphology on local field enhancement. By changing the internal polyhedron-shell nanogap morphology, the polyhedral-Au@SiO2@Au nanoparticle can realize a broadband and tunable strong local electric field enhancement.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Guoqiang Fang, Xiang Lin, Xiu Liang, Jinlei Wu, Wen Xu, Wuliji Hasi, Bin Dong
Summary: This study proposes a machine learning-driven 3D plasmonic cavity-in-cavity SERS platform for sensitive and quantitative detection of antibiotics. The application of this platform enables quantitative analysis of antibiotics at different concentrations.
Article
Chemistry, Multidisciplinary
Li Wang, Jian Huang, Mei-Juan Su, Jin-Di Wu, Weisheng Liu
Summary: A AgNPs decorated 3D bionic silicon nanograss SERS substrate with higher sensitivity and specificity was prepared by green galvanic displacement. The substrate not only has a larger specific surface area, but also provides abundant hot spots for high-sensitivity SERS sensing.
Article
Nanoscience & Nanotechnology
Qingfei Zhang, Gaizhen Kuang, Yunru Yu, Xiaoya Ding, Haozhen Ren, Weijian Sun, Yuanjin Zhao
Summary: Research has shown that using novel hierarchical hydrogel microparticles (M-DDP) to deliver drugs can release them at the tumor site, reducing systemic toxicity. This approach not only induces immunogenic cell death in tumor cells, but also suppresses immunosuppressive cells within the tumor. These hierarchical microparticles exhibit superior synergistic antitumor efficacy in cell experiments.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Hanna J. Koster, Tatu Rojalin, Randy P. Carney, Hannah J. O'Toole, Kwan Lun Chiu
Summary: Surface enhanced Raman scattering (SERS) is a powerful tool for vibrational spectroscopy that enhances chemical sensitivity by several orders of magnitude compared to spontaneous Raman scattering. However, synthesizing robust and uniform SERS substrates quickly and easily remains a challenge.
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
(2022)
Article
Engineering, Chemical
Ping Zhang, Yi-Han Li, Li Chen, Mao-Jie Zhang, Yang Ren, Yan-Xu Chen, Zhi Hu, Qi Wang, Wei Wang, Liang-Yin Chu
Summary: This work presents a microfluidic strategy for the fabrication of uniform polymeric microparticles with hierarchical porous structures and highly accessible metal-organic frameworks for efficient degradation of organic contaminants. The microparticles possess interconnected hierarchical porous structures decorated with metal-organic framework nanorods, enabling enhanced degradation of organic contaminants. The strategy combines microfluidics, emulsion droplets, and metal-organic framework nanorods as catalysts, providing a simple and general approach for the engineering of advanced microparticles for water decontamination.
FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Physical
Tamitake Itoh, Yuko S. Yamamoto
Summary: The relationship between the enhancement of optical responses of molecules and plasmon resonance has been investigated using different techniques. Quantum optics predicts that this enhancement is directly related to optical absorption and indirectly related to Rayleigh scattering and extinction. A micro-spectroscopic method is developed to obtain various optical properties and electromagnetic (EM) enhancement in plasmonic systems. The results show that absorption reproduces the EM enhancement better than Rayleigh scattering or extinction, emphasizing the importance of absorption spectroscopy in evaluating EM enhancement in coupled plasmonic systems.
JOURNAL OF CHEMICAL PHYSICS
(2023)
