Article
Engineering, Electrical & Electronic
Suratun Nafisah, Marlia Morsin, Rahmat Sanudin, Nur L. Razali, Zainiharyati Mohd Zain, Mitra Djamal
Summary: This study investigates the effects of surface density and aspect ratio of gold nanobipyramids (GNBPs) on the performance of localized surface plasmon resonance (LSPR)-based sensors. The experimental results show a linear relationship between the mean surface density and aspect ratio of GNBPs and the sensitivity of the LSPR-based sensor. The highest sensitivity is achieved with a surface density of 80.02% +/- 0.86% and an aspect ratio of 2.58 +/- 0.04. Additionally, this sample exhibits clear response recovery behavior and stable repeatability.
IEEE SENSORS JOURNAL
(2022)
Article
Multidisciplinary Sciences
Hajir Hilal, Qiang Zhao, Jeongwon Kim, Sungwoo Lee, MohammadNavid Haddadnezhad, Sungjae Yoo, Soohyun Lee, Woongkyu Park, Woocheol Park, Jaewon Lee, Joong Wook Lee, Insub Jung, Sungho Park
Summary: This study demonstrates a new three-dimensional nanostructure with polarization-independent SERS activity, prepared through a precise synthesis method. This unique structure shows efficient interaction with light and analytes, providing new possibilities for optical-based sensing.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Analytical
Monika Yadav, Manita Das, Shivangi Bhatt, Pranav Shah, Rajendrasinh Jadeja, Sonal Thakore
Summary: In this study, a novel cyclodextrin phthalate ester polymer was used to synthesize gold and silver nanoparticles for the rapid and accurate detection of sulfur-based pollutants in aqueous solutions. The gold nanoparticles selectively agglomerated upon interaction with cysteine and SDDC, allowing for visual readout. Detection and quantification of the compounds occurred within seconds due to the dual binding ability of cyclodextrin, with satisfactory limits of detection. The nanosensor demonstrated superior performance in detecting sulfur-containing compounds and can be potentially applied in environmental monitoring.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Physical
Xiaoying Wu, Xiaoli Tian, Zihe Jiang, Yun Wang, Tingting Jiang, Yuhua Feng, Zhenglong Zhang, Hongyu Chen
Summary: By controlling the interfacial energy between Au seeds and deposited Au, non-wetting growth of Au on Au seeds results in the formation of homometallic core-satellite nanostructures. The plasmonic coupling between the core and satellites can be modulated by varying the growth kinetics, allowing for tuning of the plasmonic absorptions from visible to near-infrared range. This synthetic advance provides a new approach for nanosynthesis and opens up possibilities for sophisticated functional designs.
Article
Chemistry, Analytical
Attila Bonyar
Summary: By simulating coupled plasmonic nanosphere and nano-ellipsoid dimers in LSPR biosensors, the optimization of nanoparticle arrangements can enhance sensor sensitivity. Results show that adjusting interparticle gaps and dielectric layer thickness can enhance plasmonic response range and surface sensitivity, resulting in a higher response to molecular interactions.
Article
Chemistry, Physical
Jiannan Zhu, Jing Huang, Jiawei Dai, Rong Chen, Xiaoqi Fu, Zhengyun Wang, Hongfang Liu, Guangfang Li
Summary: This study investigates the size effect of plasmonic Au@Pd core-satellite nanoparticles on the photocatalytic formic acid (FA) dehydrogenation under visible light. The results show that the smallest nanoparticles with the highest absorption/extinction ratio possess the best catalytic performance. Additionally, large nanoparticles with high scattering exhibit unexpectedly enhanced activities by raising the reaction temperature or shortening the interparticle distance.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Guojuan Yan, Huanhuan Ni, Xiaoxiao Li, Xiaolan Qi, Xi Yang, Hongyan Zou
Summary: In this study, Cu2-xSe nanoparticles with outstanding electrical and optical properties were used as catalysts for the oxidation of TMB, and a colorimetric/photothermal dual-readout array was developed for the detection of glutathione.
Article
Chemistry, Multidisciplinary
Yun Wang, Jia Jia, Jie Zhang, Ruixue Xiao, Wenjia Xu, Yuhua Feng
Summary: This work reports the colloidal synthesis of extraordinary bridged Au core-satellite structures by exploiting the buffer effect of polydopamine shell on Au core for Au atom diffusion, in which the Au bridge is well controlled in terms of width and length. Benefiting from the tunable Au bridges, the resonance energy of the CTP can be readily controlled. As a result, the LSPR absorptions of the core-satellite structures are continuously tuned within the NIR spectral range (from 900 to >1300 nm), demonstrating their great potentials for ultrafast nano-optics and biomedical applications.
Article
Chemistry, Analytical
Yanting Shen, Zhichuan Xin, Xiaoxiao Hu, Nan Wang, Shuxia Liu, Jing Wang
Summary: A dual stimulus-responsive core-satellite SERS nanoprobe was constructed for sensitive H2O2 detection. This nanosensor can be used for sensitive detection of cellular H2O2 and enables H2O2 monitoring during starvation-induced autophagy.
Article
Chemistry, Multidisciplinary
Yanfang Hu, Yonglong Li, Linfeng Yu, Yuying Zhang, Yuming Lai, Wei Zhang, Wei Xie
Summary: A universal assembly methodology for preparing hetero-superstructures is introduced in this study, enabling the assembly of building block materials without the need for molecular linkers and utilizing surface property modulation to achieve self-organization. The resulting superstructures exhibit superior photocatalytic activity and Raman scattering performance.
Article
Chemistry, Multidisciplinary
Patrick Bessel, Andre Niebur, Daniel Kranz, Jannika Lauth, Dirk Dorfs
Summary: Heterostructured Au/CuS nanocrystals exhibit localized surface plasmon resonance (LSPR) at two different wavelengths with a slight broadening compared to respective homostructured Au and CuS NCs. The resonant excitation at LSPR maxima of the heterostructured Au/CuS NCs leads to hot charge carrier relaxation associated with both LSPRs. The interaction is faster than phononic or thermal processes and involves energy or charge carrier transfer between the two materials.
Article
Chemistry, Multidisciplinary
Angela Candreva, Wiktor Lewandowski, Massimo La Deda
Summary: By controlling the reaction conditions, we can adjust the thickness of the silica shell around gold nanorods, thereby influencing the interaction distance between the nanorods. The coupling of localized surface plasmon resonance (LSPR) is most effective when the distance between the gold cores is less than 10 nm.
JOURNAL OF NANOPARTICLE RESEARCH
(2022)
Article
Chemistry, Physical
Qing Gu, Jian Zhu, Guo-jun Weng, Jian-jun Li, Jun-wu Zhao
Summary: Metallic nanoparticles with intricate nanoframe structures, such as Au@AgPt core/cage nanoframes, have been successfully prepared through galvanic replacement reaction. The surface morphology of the nanoframes can be controlled by the concentration of Pt4+ ions, leading to the formation of concave surfaces and hollowing-out processes. The size, aspect ratio, roughness, skeleton diameter, and composition ratio of the Au@AgPt nanoframes can be further tuned by adjusting the reaction conditions. These controlled shape evolutions also result in abundant localized surface plasmon resonance (LSPR) modes, with multiple absorption bands tunable from blue to near infrared range (400 nm to 1300 nm).
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Multidisciplinary
Jia Zhang, Xizhe Cheng, Han Zhang, Jiapeng Zheng, Jianfang Wang
Summary: Plasmonic nanostructures can control the photoluminescence emission properties and enhance the performance of optical systems. This study focuses on the selective enhancement of different emission lines of lanthanide ions using plasmon-enabled tuning. The integration of plasmonic and luminescent units in spherical nanostructures allows for the systematic modulation of selective emission enhancement. The results have potential applications in anti-counterfeiting and optical temperature measurements.
Article
Materials Science, Multidisciplinary
Jian Zhu, Li-na Meng, Guo-jun Weng, Jian-jun Li, Jun-wu Zhao
Summary: The study focused on the localized surface plasmon resonance (LSPR) properties of Pt-coated Au nanoellipsoid, showcasing different absorption peaks in various frequency ranges influenced by the thickness of the Pt coating. The tuning of these peaks could be achieved by adjusting the aspect ratio of the inner Au nanoellipsoid and the environmental dielectric constant, offering potential applications for multichannel plasmonic sensing.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Chemistry, Analytical
Qian Wu, Li Tian, Xiangyu Shan, Huiling Li, Chao Li, Juan Lu
Summary: A novel ECL sensor was developed by modifying Fe3CuO4-Ru(bpy)3+ and GO-CdS@ZnS on the electrode for the detection of permethrin. The sensor exhibited high sensitivity and a wide detection range.
Article
Chemistry, Analytical
Tingting Gong, Lei Liao, Bingying Jiang, Ruo Yuan, Yun Xiang
Summary: In this study, a fluorescent biosensing system for high sensitivity detection of MT was established using a new Ag+-stabilized DNA triplex probe (Ag+-SDTP) combined with catalytic hairpin assembly (CHA) and CRISPR/Cas12a signal enhancements. The sensing method is able to selectively detect MT from other non-specific molecules and can achieve low level detection of MT in diluted human serums, demonstrating its potential for monitoring disease-specific MT biomarker at trace levels.
Article
Chemistry, Analytical
Estrella Sanz Rodriguez, Kyra Wood, Paul R. Haddad, Brett Paull
Summary: This study presents a simple, rapid, and reliable method for determining boron in aqueous solutions using suppressed ion chromatography coupled to electrospray ionisation-triple quadrupole mass spectrometry. The method achieved a low limit of detection and demonstrated excellent analytical performance.
Article
Chemistry, Analytical
Aline Cournut, Paul Moustiez, Yannick Coffinier, Christine Enjalbal, Claudia Bich
Summary: Alzheimer's disease is a major cause of senile dementia and is characterized by the aggregation of neurofibrillary tangles and amyloid plaques in the brain. The A beta 1-42 peptide is considered the primary cause of neurotoxicity due to its insolubility and subsequent aggregation. A beta 1-42 and A beta 1-40 have been identified as relevant biomarkers for AD diagnosis, and SurfaceAssisted Laser Desorption/Ionization Mass Spectrometry (SALDI-MS) was used to monitor the A beta 1-42/A beta 1-40 ratio without prior sample treatment.
Article
Chemistry, Analytical
Dotse Selali Chormey, Buse Tugba Zaman, Tulay Borahan Kustanto, Sezin Erarpat Bodur, Suleyman Bodur, Elif Ozturk Er, Sezgin Bakirdere
Summary: This review provides an overview of the harmful effects of endocrine disrupting chemicals (EDCs) on human health and introduces the methods for analyzing EDCs. Recent research has focused on using green chemicals, such as deep eutectic solvents (DESs), for microextraction to ensure environmental safety.
Article
Chemistry, Analytical
Yan Zhang, Renfeng Xu, Jingjing Wu, Zhenghong Zhang, Yuhuang Wang, Hongqin Yang, Sheng Zhang
Summary: This study visualized the pore-like structures in prostate cancer cell membranes after treatment with the anticancer drug paclitaxel, demonstrating its mechanism of action related to oxidative damage.
Article
Chemistry, Analytical
Chihong Ma, Qin Zhou, Jinjin Shi, Hua Gao, Di Huang, Huimin Xue, Han Wang, Zhenzhong Zhang, Sen Yang, Junli Zhang, Kaixiang Zhang
Summary: We developed a CRISPR-empowered electrochemical biosensor, named PER-E-CRISPR, for amplification-free and sensitive detection of miR-21. The biosensor combines the advantages of CRISPR/Cas13a and primer exchange reaction (PER) for target amplification. Under optimized conditions, the PER-E-CRISPR assay exhibits a linear range from 10-13 to 10-7 M and a limit of detection of 30.2 fM. The biosensor shows excellent performance in actual plasma, indicating promising prospects for miRNA detection in molecular diagnosis.
Article
Chemistry, Analytical
Gang Liang, Jie Zhao, Yufei Gao, Tao Xie, Jianhui Zhen, Ligang Pan, Wenwen Gong
Summary: Molecular docking (MD) analysis is widely used for studying the interaction between aptamers and small molecules. This study established steady-state aptamers of tertiary structures (SATS) using specific aptamers of tetracycline antibiotics as docking models. Molecular docking results revealed multiple binding sites in the SATS of aptamers, with significant variations in binding free energy (BFE) and docking score (DS). The study also proposed a method for MD analysis based on SATS, providing insights into binding mode and predicting binding sites.
Article
Chemistry, Analytical
Yixuan Xu, Changchang Teng, Huiping Dang, Dalong Yin, Lifeng Yan
Summary: Stable organic radical molecules with high NIR fluorescence quantum efficiency have been synthesized and encapsulated into nanoparticles, which show great potential for both photodynamic therapy (PDT) and photothermal therapy (PTT) of tumors.
Article
Chemistry, Analytical
Yu Su, Dandan Yang, Yanjie Wang, Jie Ding, Lan Ding, Daqian Song
Summary: In this study, a highly selective molecularly imprinted polymer Cu-MIPs@CS was designed and synthesized for bisphenol A (BPA). Cu-MIPs@CS showed significantly enhanced imprinting factor and selective factor towards BPA compared to MIPs@CS. It also exhibited superior discrimination ability between BPA and its structural analogue. Additionally, Cu-MIPs@CS were successfully applied as a solid phase extraction adsorbent for the determination of BPA in drinking water samples.
Article
Chemistry, Analytical
Yi Qiao, Qiongdan Zhang, Yukun He, Tianguang Cheng, Jing Tu
Summary: Single cell heterogeneity plays an important role in many biological phenomena, and distinguishing cells with specific mutations is beneficial for clinical diagnosis and drug screening. This study introduces a gel plate platform that can distinguish cell types based on their phenotypes, with low equipment requirement. The gel platform has potential in point-of-care circumstances and single-cell stimulation responses that prioritize efficiency and simplicity.
Article
Chemistry, Analytical
Chengke Wang, Shuyang Sun, Ping Wang, Huawei Zhao, Wenling Li
Summary: The food safety of aquatic products is a global concern. Nanotechnology-based analyses have advantages in the detection of bacteria, metal ions, and small molecule contaminants. This review summarizes the recent advances in biosensing strategies for aquatic products and highlights the application of nanomaterials, lateral flow-based biosensors, surface-enhanced Raman scattering, microfluidic chips, and molecular imprinting technologies.
Article
Chemistry, Analytical
Liping Zhu, Zeng Tang, Xuemei Zhang, Li Zhu, Tian Meng, Linying Yu, Ting Xiao, Shasha Lu, Xiaoli Xiong, Xiurong Yang
Summary: A sensitive off-on electrochemiluminescence DNA sensor was developed using Exo III-assisted cascade amplification system. The sensor achieved high selectivity and ultra-high sensitivity in detecting target DNA by utilizing ECL and SPR effects. This study provides a new perspective for designing highly sensitive and programmable ECL biosensors.
Article
Chemistry, Analytical
Tong Li, Mengxu Sun, Suping Xia, Ting Huang, Rong-Tian Li, Chunrong Li, Zong Dai, Jin-Xiang Chen, Jun Chen, Nuan Jia
Summary: Here, we developed a binary system based on DNA tetrahedron and fluorogenic RNA aptamers for highly specific and label-free mRNA imaging in living cells. This system achieved high specificity label-free detection of nucleic acids with a detection limit of 1.34 nM. The method has potential applications in early disease diagnosis and new drug development.
Article
Chemistry, Analytical
Yao Zhao, Shu Zhang, Wang Yao, Yuxuan Zhu, Jing Qian, Juan Yang, Nianjun Yang
Summary: A new hierarchical nanostructured composite with high conductivity and catalytic activity is synthesized. The sensor exhibits significant catalytic effect and high sensitivity for monitoring the environmental endocrine disruptor bisphenol A (BPA).