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Xu T, Wang X, Huang Y, Lai K, Fan Y. Rapid detection of trace methylene blue and malachite green in four fish tissues by ultra-sensitive surface-enhanced Raman spectroscopy coated with gold nanorods. Food Control 2019. [DOI: 10.1016/j.foodcont.2019.106720] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Wen TC, Lu CW, Hsieh WC, Chang ST, Yang YT, Deng JP. Heat-induced morphological transformation of gold nanodumbbells in ionic surfactant solutions. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2017.12.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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3
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Ma Y, Gao W, Shan H, Chen W, Shang W, Tao P, Song C, Addiego C, Deng T, Pan X, Wu J. Platinum-Based Nanowires as Active Catalysts toward Oxygen Reduction Reaction: In Situ Observation of Surface-Diffusion-Assisted, Solid-State Oriented Attachment. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1703460. [PMID: 29052926 DOI: 10.1002/adma.201703460] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 08/13/2017] [Indexed: 06/07/2023]
Abstract
Facile fabrication of advanced catalysts toward oxygen reduction reaction with improving activity and stability is significant for proton-exchange membrane fuel cells. Based on a generic solid-state reaction, this study reports a modified hydrogen-assisted, gas-phase synthesis for facile, scalable production of surfactant-free, thin, platinum-based nanowire-network electrocatalysts. The free-standing platinum and platinum-nickel alloy nanowires show improvements of up to 5.1 times and 10.9 times for mass activity with a minimum 2.6% loss after an accelerated durability test for 10k cycles; 8.5 times and 13.8 times for specific activity, respectively, compared to commercial Pt/C catalyst. In addition, combined with a wet impregnation method, different substrate-materials-supported platinum-based nanowires are obtained, which paves the way to practical application as a next-generation supported catalyst to replace Pt/C. The growth stages and formation mechanism are investigated by an in situ transmission electron microscopy study. It reveals that the free-standing platinum nanowires form in the solid state via metal-surface-diffusion-assisted oriented attachment of individual nanoparticles, and the interaction with gas molecules plays a critical role, which may represent a gas-molecular-adsorbate-modified growth in catalyst preparation.
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Affiliation(s)
- Yanling Ma
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Wenpei Gao
- Department of Chemical Engineering and Materials Science, University of California, Irvine, CA, 92697, USA
| | - Hao Shan
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Wenlong Chen
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Wen Shang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Peng Tao
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Chengyi Song
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Chris Addiego
- Department of Physics and Astronomy, University of California, Irvine, CA, 92697, USA
| | - Tao Deng
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Xiaoqing Pan
- Department of Chemical Engineering and Materials Science, University of California, Irvine, CA, 92697, USA
- Department of Physics and Astronomy, University of California, Irvine, CA, 92697, USA
| | - Jianbo Wu
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
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Harris-Birtill D, Singh M, Zhou Y, Shah A, Ruenraroengsak P, Gallina ME, Hanna GB, Cass AEG, Porter AE, Bamber J, Elson DS. Gold nanorod reshaping in vitro and in vivo using a continuous wave laser. PLoS One 2017; 12:e0185990. [PMID: 29045438 PMCID: PMC5646757 DOI: 10.1371/journal.pone.0185990] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 09/23/2017] [Indexed: 11/19/2022] Open
Abstract
Gold nanorods (GNRs) are increasingly being investigated for cancer theranostics as they possess features which lend themselves in equal measures as contrast agents and catalysts for photothermal therapy. Their optical absorption spectral peak wavelength is determined by their size and shape. Photothermal therapy using GNRs is typically established using near infrared light as this allows sufficient penetration into the tumour matrix. Continuous wave (CW) lasers are the most commonly applied source of near infrared irradiation on GNRs for tumour photothermal therapy. It is perceived that large tumours may require fractionated or prolonged irradiation. However the true efficacy of repeated or protracted CW irradiation on tumour sites using the original sample of GNRs remains unclear. In this study spectroscopy and transmission electron microscopy are used to demonstrate that GNRs reshape both in vitro and in vivo after CW irradiation, which reduces their absorption efficiency. These changes were sustained throughout and beyond the initial period of irradiation, resulting from a spectral blue-shift and a considerable diminution in the absorption peak of GNRs. Solid subcutaneous tumours in immunodeficient BALB/c mice were subjected to GNRs and analysed with electron microscopy pre- and post-CW laser irradiation. This phenomenon of thermally induced GNR reshaping can occur at relatively low bulk temperatures, well below the bulk melting point of gold. Photoacoustic monitoring of GNR reshaping is also evaluated as a potential clinical aid to determine GNR absorption and reshaping during photothermal therapy. Aggregation of particles was coincidentally observed following CW irradiation, which would further diminish the subsequent optical absorption capacity of irradiated GNRs. It is thus established that sequential or prolonged applications of CW laser will not confer any additional photothermal effect on tumours due to significant attenuations in the peak optical absorption properties of GNRs following primary laser irradiation.
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Affiliation(s)
- David Harris-Birtill
- Hamlyn Centre for Robotic Surgery, Imperial College London, London, United Kingdom
- Department of Surgery and Cancer, Imperial College London, London, United Kingdom
| | - Mohan Singh
- Hamlyn Centre for Robotic Surgery, Imperial College London, London, United Kingdom
- Department of Surgery and Cancer, Imperial College London, London, United Kingdom
| | - Yu Zhou
- Department of Chemistry, Imperial College London, London, United Kingdom
| | - Anant Shah
- Joint Department of Physics and CRUK Cancer Imaging Centre, Institute of Cancer Research and Royal Marsden NHS Foundation Trust, Sutton, London, United Kingdom
| | - Pakatip Ruenraroengsak
- Hamlyn Centre for Robotic Surgery, Imperial College London, London, United Kingdom
- Department of Materials and London Centre for Nanotechnology, Imperial College London, London, United Kingdom
| | - Maria Elena Gallina
- Hamlyn Centre for Robotic Surgery, Imperial College London, London, United Kingdom
- Department of Surgery and Cancer, Imperial College London, London, United Kingdom
| | - George B. Hanna
- Department of Surgery and Cancer, Imperial College London, London, United Kingdom
| | - Anthony E. G. Cass
- Department of Chemistry, Imperial College London, London, United Kingdom
| | - Alexandra E. Porter
- Department of Materials and London Centre for Nanotechnology, Imperial College London, London, United Kingdom
| | - Jeffrey Bamber
- Joint Department of Physics and CRUK Cancer Imaging Centre, Institute of Cancer Research and Royal Marsden NHS Foundation Trust, Sutton, London, United Kingdom
| | - Daniel S. Elson
- Hamlyn Centre for Robotic Surgery, Imperial College London, London, United Kingdom
- Department of Surgery and Cancer, Imperial College London, London, United Kingdom
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Hristov DR, Ye D, de Araújo JM, Ashcroft C, DiPaolo B, Hart R, Earhart C, Lopez H, Dawson KA. Using single nanoparticle tracking obtained by nanophotonic force microscopy to simultaneously characterize nanoparticle size distribution and nanoparticle-surface interactions. NANOSCALE 2017; 9:4524-4535. [PMID: 28317988 DOI: 10.1039/c6nr09331k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Comprehensive characterization of nanomaterials for medical applications is a challenging and complex task due to the multitude of parameters which need to be taken into consideration in a broad range of conditions. Routine methods such as dynamic light scattering or nanoparticle tracking analysis provide some insight into the physicochemical properties of particle dispersions. For nanomedicine applications the information they supply can be of limited use. For this reason, there is a need for new methodologies and instruments that can provide additional data on nanoparticle properties such as their interactions with surfaces. Nanophotonic force microscopy has been shown as a viable method for measuring the force between surfaces and individual particles in the nano-size range. Here we outline a further application of this technique to measure the size of single particles and based on these measurement build the distribution of a sample. We demonstrate its efficacy by comparing the size distribution obtained with nanophotonic force microscopy to established instruments, such as dynamic light scattering and differential centrifugal sedimentation. Our results were in good agreement to those observed with all other instruments. Furthermore, we demonstrate that the methodology developed in this work can be used to study complex particle mixtures and the surface alteration of materials. For all cases studied, we were able to obtain both the size and the interaction potential of the particles with a surface in a single measurement.
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Affiliation(s)
- Delyan R Hristov
- Center for BioNano Interaction, School of Chemistry, University College Dublin, Belfield, Dublin, Ireland.
| | - Dong Ye
- Center for BioNano Interaction, School of Chemistry, University College Dublin, Belfield, Dublin, Ireland.
| | - Joao Medeiros de Araújo
- Center for BioNano Interaction, School of Chemistry, University College Dublin, Belfield, Dublin, Ireland. and Departamento de Física, Universidade Federal do Rio Grande do Norte, Natal-RN, Brazil
| | | | | | - Robert Hart
- Optofluidics, Inc., Philadelphia, PA 19104, USA
| | | | - Hender Lopez
- Center for BioNano Interaction, School of Chemistry, University College Dublin, Belfield, Dublin, Ireland.
| | - Kenneth A Dawson
- Center for BioNano Interaction, School of Chemistry, University College Dublin, Belfield, Dublin, Ireland.
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Gallina ME, Zhou Y, Johnson CJ, Harris-Birtill D, Singh M, Zhao H, Ma D, Cass T, Elson DS. Aptamer-conjugated, fluorescent gold nanorods as potential cancer theradiagnostic agents. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 59:324-332. [PMID: 26652380 DOI: 10.1016/j.msec.2015.09.101] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Revised: 09/21/2015] [Accepted: 09/28/2015] [Indexed: 12/17/2022]
Abstract
GNRs are emerging as a new class of probes for theradiagnostic applications thanks to their unique optical properties. However, the achievement of proper nanoconstructs requires the synthesis of highly pure GNRs with well-defined aspect ratio (AR), in addition to extensive surface chemistry modification to provide them with active targeting and, possibly, multifunctionality. In this work, we refined the method of the seed mediated growth and developed a robust procedure for the fabrication of GNRs with specific AR. We also revealed and characterized unexplored aging phenomena that follow the synthesis and consistently alter GNRs' final AR. Such advances appreciably improved the feasibility of GNRs fabrication and offered useful insights on the growth mechanism. We next produced fluorescent, biocompatible, aptamer-conjugated GNRs by performing ligand exchange followed by bioconjugation to anti-cancer oligonucleotide AS1411. In vitro studies showed that our nanoconstructs selectively target cancer cells while showing negligible cytotoxicity. As a result, our aptamer-conjugated GNRs constitute ideal cancer-selective multifunctional probes and promising candidates as photothermal therapy agents.
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Affiliation(s)
- Maria Elena Gallina
- Hamlyn Centre for Robotic Surgery, Institute of Global Health Innovation and Department of Surgery and Cancer, Imperial College London, UK.
| | - Yu Zhou
- Department of Chemistry, Institute of Biomedical Engineering and Chemical Biology Centre, Imperial College London, UK
| | - Christopher J Johnson
- Department of Chemistry, Institute of Biomedical Engineering and Chemical Biology Centre, Imperial College London, UK
| | - David Harris-Birtill
- Hamlyn Centre for Robotic Surgery, Institute of Global Health Innovation and Department of Surgery and Cancer, Imperial College London, UK
| | - Mohan Singh
- Hamlyn Centre for Robotic Surgery, Institute of Global Health Innovation and Department of Surgery and Cancer, Imperial College London, UK
| | - Hailin Zhao
- Department of Surgery and Cancer, Imperial College London, UK
| | - Daqing Ma
- Department of Surgery and Cancer, Imperial College London, UK
| | - Tony Cass
- Department of Chemistry, Institute of Biomedical Engineering and Chemical Biology Centre, Imperial College London, UK
| | - Daniel S Elson
- Hamlyn Centre for Robotic Surgery, Institute of Global Health Innovation and Department of Surgery and Cancer, Imperial College London, UK
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Li N, Zhao P, Astruc D. Anisotrope Gold-Nanopartikel: Synthese, Eigenschaften, Anwendungen und Toxizität. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201300441] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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8
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Li N, Zhao P, Astruc D. Anisotropic Gold Nanoparticles: Synthesis, Properties, Applications, and Toxicity. Angew Chem Int Ed Engl 2014; 53:1756-89. [DOI: 10.1002/anie.201300441] [Citation(s) in RCA: 691] [Impact Index Per Article: 69.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 03/26/2013] [Indexed: 12/26/2022]
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