Article
Chemistry, Physical
Alex Ricardo Silva Olaya, Franziska Kuehling, Christoph Mahr, Birthe Zandersons, Andreas Rosenauer, Joerg Weissmueller, Gunther Wittstock
Summary: Nanoporous gold (NPG) with less than 1% residual Ag content was studied as an electrocatalyst for the oxidation of methanol, formaldehyde, and formate. The surface structure and oxidation reaction of NPG can be controlled by adjusting the Ag content and potential. Ag has a significant impact on the onset potential and peak current density of the catalytic reaction.
Article
Chemistry, Physical
Claire Goldmann, Marta De Frutos, Eric H. Hill, Doru Constantin, Cyrille Hamon
Summary: The study introduces a simple aqueous approach to breaking the inversion symmetry of silver nanorods by controlling the addition of DMSO, showcasing the potential of DMSO for controlling complex nanostructure synthesis. Simulations and experiments demonstrate the impact of DMSO adsorption on various surface interactions, affecting the deposition kinetics of silver.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Amrita Chakraborty, Megha Maria Stanley, Biswajit Mondal, Nonappa, Mohammad Bodiuzzaman, Papri Chakraborty, M. P. Kannan, Thalappil Pradeep
Summary: Quantized energy levels and unique optoelectronic properties of atomically precise noble metal nanoclusters have made them important in various fields. Recent studies have shown that these nanoclusters can either participate in colloidal assembly or lead to products with atom exchange depending on the reactant. Furthermore, anisotropic plasmonic nanoparticles with sharp edges and protrusions exhibit higher chemical reactivity and can induce site-specific growth of foreign metals and metal oxide shells.
Article
Chemistry, Inorganic & Nuclear
Suju Jiang, Feifei Chen, Xiqiong Wen, Chonghui Huang, Yifeng Xuan, Hua Yao, Zihua Wu, Guobao Huang, Lili Meng
Summary: By utilizing m-phenylenediamine as a reducing agent, it is proposed and demonstrated that gold nanorods with a small diameter of approximately 13.2 nm and a largest plasmon wavelength exceeding 1000 nm can be synthesized with high monodispersity and shape yield. Precise control over the plasmon wavelength and particle size can be achieved by varying the amount of silver ions.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Feifei Chen, Suju Jiang, Qiaozhi Zhou, Siqi Chen, Zihua Wu, Yuyang Guo, Anhua Wei, Jingmei Yuan, Guobao Huang
Summary: Facile preparation of small gold nanorod with controllable and large surface plasmon resonance band is of great value for applications in especially the biomedical and sensing fields. In this work, we propose a simple method using catechol as reducing agent to synthesize gold nanorods with high shape yield, largest plasmon wavelength and small diameter simultaneously. The effects of various experimental parameters have been studied and the morphological and structural evolutions of the particle have been discussed based on growth mechanism.
Article
Chemistry, Analytical
Xin Zhang, Zihan Wang, Ziyuan Liu, Bin Liu, Rufen Wu, Zhengbo Chen, Xia Zuo
Summary: An effective and robust colorimetric sensor array has been proposed for simultaneous detection and discrimination of five reducing sugars. Different reducing sugars can be quantitatively distinguished by distinct colorimetric response patterns, showing high sensitivity and stability.
Article
Chemistry, Multidisciplinary
Yanjun Yang, Chunyuan Song, Jingjing Zhang, Jie Chao, Hoang Mai Luong, Yiping Zhao, Lianhui Wang
Summary: This article introduces a surface-enhanced Raman scattering (SERS) sensor based on a functionalized multiple-armed tetrahedral DNA nanostructure, which is capable of detecting multiple nucleic acid and protein biomarkers related to lung cancer and has enhanced sensitivity. The sensor achieves enhanced Raman signals through DNA self-assembled gold nanoparticle clusters in multiplex detections.
Article
Chemistry, Multidisciplinary
Indresh Kumar, Chinky Gangwar, Bushra Yaseen, Pradeep Kumar Pandey, Sheo K. Mishra, Radhey Mohan Naik
Summary: In this study, silver nanoparticles (SNPs) in the size range of 6-10 nm were successfully synthesized using a chemical reduction method. The formation of SNPs was studied spectrophotometrically, and a plausible mechanism for the formation of SNPs colloid was proposed based on experimental findings. SNPs showed remarkable catalytic activity for the reduction of the cationic dye methylene blue.
Article
Chemistry, Multidisciplinary
Sajjad Hussain Parrey, Mohsin Maseet, Rabia Ahmad, Abbul Bashar Khan
Summary: Silver nanoparticles (Ag NPs) were synthesized for the first time using Cassia siamea flower petal extract (CSFE) as a reducing agent. The effects of anionic surface-active agent sodium dodecyl sulfate (SDS) on the development and texture of Ag NPs were studied, showing different shapes and sizes of Ag NPs under various synthesis conditions. The synthesized Ag NPs exhibited promising antifungal activity against different Candida strains, especially Candida tropicalis.
Article
Physics, Atomic, Molecular & Chemical
Takahiro Fukagawa, Yasuro Niidome
Summary: The capillary action of an Au-Ag core-shell nanorod solution between a copper wire and an indium tin oxide (ITO) plate controlled the deposition of nanorods. Optical dark-field microscopy revealed the behavior of nanorods in laser desorption/ionization (LDI) mass spectrometry.
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
(2022)
Article
Engineering, Electrical & Electronic
Azzah Fawaz Muneer Althaaly, Shaeel Ahmad Al-Thabaiti, Zaheer Khan
Summary: It was found that silver nanoparticles were fabricated using Senna leaf extract and used as an activator for the degradation of Congo red. The degradation of Congo red was enhanced with increasing concentrations of potassium persulfate and decreasing concentrations of Congo red. Additionally, temperature and pH value also had an impact on the degradation of Congo red.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Biochemistry & Molecular Biology
Mayakrishnan Arumugam, Balaji Murugesan, Premkumar Balasekar, Sivakumar Ponnurengam Malliappan, Dhilip kumar Chinnalagu, Krithikapriya Chinniah, Yurong Cai, Sundrarajan Mahalingam
Summary: This study focuses on the design and development of silver and gold nanoparticles incorporated into silk fibroin and gelatin composite nanofibers using the electrospun method. The study investigates the functional group, chemical composition, and thermal stability of the composite nanofibrous scaffolds and confirms their morphology, thickness, and roughness area. The study also analyzes the size and structure of the metal nanoparticles in the composite nanofibers and evaluates the viability of cells and wound healing rate using various techniques. The results show that the SF/GL/Ag-Au composite nanofiber scaffolds are highly effective in accelerating wound closure and promoting wound healing.
PROCESS BIOCHEMISTRY
(2023)
Article
Chemistry, Applied
Eid M. S. Azzam, Radwa M. Sami, Khalaf M. Alenezi, Ashan Haque, Hani El Moll, Raoudha A. Soury, Abdallah R. Ismail
Summary: The study demonstrates the antibacterial activity of silver nanoparticles coated with surfactants P10 and P12 against sulfate reducing bacteria, highlighting the importance of using surfactants in the design of new biocides.
JOURNAL OF SURFACTANTS AND DETERGENTS
(2022)
Article
Nanoscience & Nanotechnology
S. Pirathiba, B. S. Dayananda
Summary: The waste extract of Raphanus raphanistrum peel was used for the synthesis of silver and gold nanoparticles, with gold nanoparticles showing a higher degradation efficiency against methylene blue and congo red compared to silver nanoparticles. Various characterization techniques were utilized to analyze the nanoparticles and their catalytic behavior against model pollutants.
DIGEST JOURNAL OF NANOMATERIALS AND BIOSTRUCTURES
(2022)
Article
Biotechnology & Applied Microbiology
K. G. U. R. Kumarasinghe, W. C. H. Silva, M. D. A. Fernando, L. Palliyaguru, P. S. Jayawardena, M. Shimomura, S. S. N. Fernando, T. D. C. P. Gunasekara, P. M. Jayaweera
Summary: By synthesizing AgNPs/NC composite and preparing them into thin films, good antimicrobial and antibiofilm activities can be achieved on surfaces in healthcare environments.
BIOMED RESEARCH INTERNATIONAL
(2021)
Article
Chemistry, Physical
Mariia Ivanchenko, Vida Nooshnab, Alline F. Myers, Nicolas Large, Andrew J. Evangelista, Hao Jing
Summary: Researchers prepared colloidal monodisperse eccentric dual plasmonic noble metal-nonstoichiometric copper chalcogenide (Au@Cu2-xSe) hybrid hetero-nanostructures with controllable semiconductor shell size and two tunable localized surface plasmon resonances (LSPRs). The experimental and computational results demonstrated the superior catalytic activity and higher rate constants of Au@Cu2-xSe in photocatalysis, attributed to the enhanced electromagnetic field strength arising from efficient plasmonic coupling under the excitation of two LSPRs.
Article
Chemistry, Physical
Mengqi Sun, Zixin Wang, Hui Wang
Summary: Multicomponent heteronanostructures are a class of multifunctional nanomaterials with tunable properties used for targeted applications. The combination of Au and copper chalcogenide domains in heteronanostructures creates a unique hybrid material system with adjustable optical properties through precise control of structure and crystalline phases. A versatile synthetic approach has been developed for selectively accessing a series of Au@copper chalcogenide heteronanostructures with tailored intraparticle architectures, tunable domain sizes, and targeted crystalline phases.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Andrew J. Evangelista, Mariia Ivanchenko, Hao Jing
Summary: The work demonstrates photocatalytic hydrogen evolution from ammonia borane under near-infrared laser irradiation using novel core-shell upconversion-semiconductor hybrid nanostructures, showing significantly higher activities compared to bare upconversion nanoparticles. The efficient charge separation and generation of reactive species promote hydrogen production, paving the way for on-board hydrogen generation from ammonia borane under near-infrared illumination for green energy applications.
Article
Chemistry, Physical
Kexun Chen, Hui Wang
Summary: This study systematically compares the behavior differences of an alkynylated aniline derivative and its thiolated counterpart during plasmon-driven photocatalytic reactions. Surface-enhanced Raman scattering is used to track the structural evolution of the transforming molecular adsorbates in real time, and the influence of metal-adsorbate interaction on their behaviors is elucidated through theoretical calculations.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Zixin Wang, Hui Wang
Summary: This study compares the nucleation and growth behaviors of Pt, Pd, and Rh nanocrystals on polydopamine supports and investigates their kinetic features in the catalytic transfer hydrogenolysis of methyl orange. The results show that the selection of reaction pathways and the surface adsorption cooperativity are crucial factors in determining the overall kinetic behavior of the catalytic reactions.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Zixin Wang, Hui Wang
Summary: This study compares the kinetic characteristics of transfer hydrogenolysis of methyl orange catalyzed by polydopamine-supported Pt and Ru nanoparticles. The results demonstrate that changing the PGM elements in the nanocatalysts or the hydrogen-donating species can selectively switch the catalytic reaction among different mechanistically distinct pathways, resulting in distinctive kinetic features. This work not only sheds light on the mechanistic diversity of PGM-driven heterogeneous catalysis but also reveals the multimodal catalytic behaviors of supported PGM nanoparticles.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Multidisciplinary Sciences
Xiaojun Wei, Xiaoqin Wang, Zehui Zhang, Yuanyuan Luo, Zixin Wang, Wen Xiong, Piyush K. Jain, John R. Monnier, Hui Wang, Tony Y. Hu, Chuanbing Tang, Helmut Albrecht, Chang Liu
Summary: This study presents a click chemistry amplified nanopore (CAN) assay for ultrasensitive detection of the viral capsid protein p24 in early HIV-1 infection. The CAN assay achieves higher analytical sensitivity than traditional methods and correlates with CD4 count and viral load, suggesting its potential importance in early infection detection and monitoring HIV progression and treatment efficacy. It can also be adapted for detecting other infectious diseases.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Hui Wang, Kexun Chen
Summary: This research precisely correlates the chemical nature of metal-adsorbate interactions to the kinetic characteristics of molecular transformations using surface-enhanced Raman spectroscopy. It has been found that the plasmonic reactivity of nitrophenyl derivative adsorbates on Ag nanoparticle surfaces decreases significantly when the bonding modes of metal-adsorbate interactions switch from sigma-donation to pi-back-donation.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Kexun Chen, Hui Wang
Summary: The superlinear dependence of the reaction rate on the power of the excitation light is a characteristic of plasmon-driven photocatalysis on nano-structured metal surfaces. However, distinguishing and quantifying the thermal and nonthermal effects have been challenging. In this study, surface-enhanced Raman scattering was used to correlate kinetic features of plasmon-mediated molecular transformations to local temperatures at active sites on photocatalyst surfaces. Results show that the observed superlinearity in the power dependence originates from photothermal heating rather than nonthermal plasmonic effects.
Article
Nanoscience & Nanotechnology
Zixin Wang, Hui Wang
Summary: The synthesis of Ru nanocrystals in metastable crystal phases has been achieved through one-pot thermal reduction of appropriate Ru(III) precursors in a polyol solvent with the assistance of polydopamine (PDA). The phase-controlled synthesis of capping ligand-free Ru nanocrystals allows for a systematic comparison of their catalytic activities towards the oxidation of TMB, revealing the influence of crystalline structures and other factors on reaction rates and kinetic features.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Zixin Wang, Hui Wang
Summary: This study synthesized Au@C/Pt core@shell/satellite supra-nanostructures and demonstrated the modulation of catalytic reaction kinetics through plasmonic antenna effects and photothermal transduction. The interplay between plasmonic and catalytic effects in these antenna-reactor nanohybrids was investigated using a specific model reaction.
NANOSCALE ADVANCES
(2023)
Article
Nanoscience & Nanotechnology
Zixin Wang, Wei Wang, Max Wamsley, Dongmao Zhang, Hui Wang
Summary: Polydopamine (PDA) is a unique bioinspired synthetic polymer with broad light absorption, efficient photothermal conversion, and versatile surface adhesion. By utilizing PDA beads as a support material and combining it with Pd nanocatalysts, thermal catalytic reactions can be enhanced through visible and near-infrared light illumination.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Mariia Ivanchenko, Hao Jing
Summary: The study focused on the influence of plasmonic coupling effects between different components in Au NRs@Cu2-xSe nanostructures on their characteristics. Anisotropic Au@Cu2-xSe hetero-nanostructures with well-controlled design and optical properties were obtained, resulting in the superimposition of LSPR bands of gold and copper selenide in the NIR region, leading to superior photocatalytic properties of the nanostructures.
NANOSCALE ADVANCES
(2022)
Article
Chemistry, Multidisciplinary
Wei Wang, Zixin Wang, Mengqi Sun, Hui Zhang, Hui Wang
Summary: Research has shown that by precisely controlling the particle size of nano Pt catalysts, the pathway selection in chemical reactions can be influenced, and may trigger switching between different reaction pathways.
Article
Chemistry, Multidisciplinary
Mariia Ivanchenko, Andrew J. Evangelista, Hao Jing
Summary: Catalytic transformations under light irradiation are demonstrated through excitation of localized surface plasmon resonances in noble metal-based nanoparticles. By utilizing galvanic replacement reaction, Pd-rich plasmonic nanorattles with increased dimensions and enlarged cavity sizes are successfully fabricated in this study.