Article
Materials Science, Multidisciplinary
Anran Zhang, Yangping Zhang, Zhangmeng Liu, Gangan Huang, Lihua Wu, Yunzhi Fu, Xiaomei Wang, Yukou Du
Summary: This article reviews the development of anisotropic gold nanostructures, the properties of gold, and its potential for solar energy applications. It provides a detailed introduction to the stability, optical properties, and hot carrier states of gold. The characteristics of anisotropic gold nanostructures in different morphologies are summarized, and the maximum efficiency of solar light utilization is analyzed.
APPLIED MATERIALS TODAY
(2022)
Article
Chemistry, Multidisciplinary
Angeline S. Dileseigres, Yoann Prado, Olivier Pluchery
Summary: The functionalization of gold nanoparticles with thiol molecules in solution is crucial for their application development. In this study, the changes in localized surface plasmon resonance (LSPR) peak due to the reaction between thiol molecules and gold nanoparticles were investigated using UV-visible spectroscopy. The saturation of thiol molecules on the nanoparticle surface was confirmed, and the wavelength shift was accurately predicted using an analytical model. The kinetics of the functionalization reaction were found to be rapid, completing in less than an hour.
Article
Chemistry, Analytical
Valfredo Azevedo Lemos, Jeferson Alves Barreto, Luana Bastos Santos, Rosivan dos Santos de Assis, Cleber Galvao Novaes, Ricardo J. Cassella
Summary: Dispersive liquid-liquid microextraction (DLLME) is widely used for the separation and preconcentration of various chemical species, with some systems using a syringe as an extraction environment. This review discusses methods utilizing this approach, critical aspects like dispersion promotion, analytical characteristics, and the pros and cons of the methods, as well as future trends in in-syringe microextraction systems.
Article
Nanoscience & Nanotechnology
Chia-Wen Kuo, Sheng-Hann Wang, Shu-Cheng Lo, Wei-Han Yong, Ya-Lun Ho, Jean-Jacques Delaunay, Wan-Shao Tsai, Pei-Kuen Wei
Summary: The study proposes a method for sensitive detection of small molecules by coupling image dipoles of gold nanoparticles with Fano resonance of capped gold nanoslits. The coupling mechanism was verified through calculations and experiments, showing potential for detecting low concentrations of small molecules. This resonant coupling significantly pushes the sensitivity boundary, with the detection limit reported to be 3 orders of magnitude lower than prism-based SPR.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Biochemistry & Molecular Biology
Chiara Dal Bosco, Francesca Mariani, Alessandra Gentili
Summary: A green solvent-based DLLME/HPLC-MS method has been developed for the determination of 19 pesticides in wine samples. The method shows high recovery, good precision, and low detection limits, making it a quick and cost-effective analysis.
Article
Chemistry, Multidisciplinary
Evgeniya D. Novikova, Yuri A. Vorotnikov, Nazar A. Nikolaev, Alphiya R. Tsygankova, Michael A. Shestopalov, Olga A. Efremova
Summary: Photodynamic and photothermal therapies are promising candidates for multimodal anticancer therapies, and combining octahedral molybdenum clusters with plasmonic spherical gold nanoparticles can enhance their photophysical properties synergistically. By careful selection of spacing between the cluster and the gold nanoparticle, significant improvements in luminescence and photosensitizing properties of the cluster were achieved compared to similar gold-free particles. The cluster complex also facilitated energy conversion to heat by gold particles, increasing the heating rate under laser irradiation.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Analytical
Bereket Tesfaye, Abera Gure, Tsegaye Girma Asere, Guyo Jilo Molole
Summary: A deep eutectic solvent-based dispersive liquid-liquid microextraction method was developed for the extraction and preconcentration of organochlorine pesticides from water and apple juice samples. The method showed good linearity, low detection limits, and high recovery values, indicating it to be a rapid, simple, and environmentally-friendly alternative for determining OCPs in various matrices.
MICROCHEMICAL JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Swathi Swaminathan, Vishal Govind Rao, Jitendra K. Bera, Manabendra Chandra
Summary: The study demonstrates the simultaneous utilization of hot carriers in the photocatalytic transformation of benzylamine and the catalytic oxidation of 4-methoxybenzylamine using gold nanoparticles. Excitation of AuNP allows tuning of charge carrier potential energy relative to reactants' redox potential, leading to energetically favorable product formation. The reaction mechanism is proposed based on in situ Raman spectroscopy, NMR spectroscopy, and GC-MS analysis of reaction intermediates and products.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Hirotaka Uzawa, Takehiro Nagatsuka, Yasuo Seto, Yoshihiro Nishida, Masato Saito, Eiichi Tamiya
Summary: Glycolipid chips with a double layer of Au nanoparticles were developed for detecting biological toxins. The chips consisted of an under and an upper layer of Au nanoparticles on glass plates, linked with 1,8-octanedithiol using a self-assembled monolayer technique. A tris-sialo glycosphingolipid, ganglioside GT1b, was immobilized on the upper layer and botulinum toxin was detected using localized surface plasmon resonance (LSPR). The GT1bCer-coated chip with a double layer of Au nanoparticles showed enhanced LSPR detection of the toxin compared to single monolayers. The combination of 60 and 40 nm Au nanoparticles in the under and upper layer, respectively, achieved the best results for toxin detection below 5 ng/mL using a portable LSPR device.
Article
Chemistry, Physical
Bing Qiu, Chao Yuan, Mingtai Sun, Weijie Hu, Hua Tan, Suhua Wang
Summary: Due to their unique plasmonic properties, noble metals have become the preferred materials for applications in photovoltaics, photocatalysis, and sensors. In this study, gold (Au) monolayers with adjustable particle diameters and optical properties were successfully fabricated on transparent indium tin oxide (ITO) through a simple electrochemical deposition. The gold nanoparticles on ITO were spherical and isolated, identified as Au0 nanoparticles. The size and population density of the gold nanoparticles on ITO surface increased at lower current densities, resulting in higher light scattering.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Hemant Ramakant Hegde, Santhosh Chidangil, Rajeev K. Sinha
Summary: This study presents the synthesis and surface immobilization of Au nanostars, Au nanocubes, and Au nanorods for refractometric sensing applications. The results demonstrate that Au nanostars with LSPR peak at 767nm exhibit the highest RI sensitivity among the tested nanostructures.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Analytical
Upenyu L. Muza, Lisa Ehrlich, Doris Pospiech, Albena Lederer
Summary: In this study, a novel photoreduction-based protocol was developed to functionalize imidazolium-containingionic polymers with gold nanoparticles. The characterization and analysis of the modified nanostructures were achieved using three-dimensional correlation thermal field-flow fractionation. The results demonstrated the suitability of this method for monitoring the thermostability and dynamics of metallic nanostructures.
ANALYTICAL CHEMISTRY
(2023)
Article
Spectroscopy
Homa Rezaei, Abolghasem Jouyban, Elaheh Rahimpour
Summary: In this study, a fast and easy method based on gold nanoparticles was developed for the determination of uric acid in urine samples. The method utilized gold nanoparticles as a sensor to measure uric acid concentration based on its strong reducing property, and optimized the main parameters affecting response signals. The results demonstrated that this nano-based method is highly sensitive and simple for the determination of uric acid in urine samples.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Chemistry, Analytical
Xiaojun Hu, Ruhui Hu, Han Zhu, Qiang Chen, Yongkai Lu, Jie Chen, Yawen Liu, Hongxia Chen
Summary: A nanozyme-based biosensing platform using self-assembled iron porphyrin mediated supramolecular modified gold nanoparticles was developed for the early diagnosis of Parkinson's disease. The sensor achieved sensitive detection of nitrated alpha-synuclein as a potential biomarker, showing promising results in distinguishing healthy individuals from PD patients using actual samples.
Article
Chemistry, Physical
Sunghee Lee, Omar Ibrahim, Zahra Fakhraai, So-Jung Park
Summary: The study focuses on the impact of mismatch in strength and energy of surface plasmon resonance (SPR) on global magnetic resonance modes in nanobead assemblies of different sizes or materials. Results show that in binary metamolecules (BMMs) composed of different sized gold beads, small beads enhance overall plasmon coupling, while in BMMs made of gold and silver beads of the same size, coupling significantly affects magnetic resonance modes. These findings provide valuable guidelines for the fabrication of colloidal metamolecules with desired metamaterial properties.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
