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Core-shell structured gold nanoparticles as carrier for 166Dy/ 166Ho in vivo generator. EJNMMI Radiopharm Chem 2022; 7:16. [PMID: 35852733 PMCID: PMC9296738 DOI: 10.1186/s41181-022-00170-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 07/04/2022] [Indexed: 12/24/2022] Open
Abstract
Background Radionuclide therapy (RNT) has become a very important treatment modality for cancer nowadays. Comparing with other cancer treatment options, sufficient efficacy could be achieved in RNT with lower toxicity. β− emitters are frequently used in RNT due to the long tissue penetration depth of the β− particles. The dysprosium-166/holmium-166 (166Dy/166Ho) in vivo generator shows great potential for treating large malignancies due to the long half-life time of the mother nuclide 166Dy and the emission of high energy β− from the daughter nuclide 166Ho. However, the internal conversion occurring after β− decay from 166Dy to 166Ho could cause the release of about 72% of 166Ho when 166Dy is bound to conventional chelators. The aim of this study is to develop a nanoparticle based carrier for 166Dy/166Ho in vivo generator such that the loss of the daughter nuclide 166Ho induced by internal conversion is prevented. To achieve this goal, we radiolabelled platinum-gold bimetallic nanoparticles (PtAuNPs) and core–shell structured gold nanoparticles (AuNPs) with 166Dy and studied the retention of both 166Dy and 166Ho under various conditions. Results The 166Dy was co-reduced with gold and platinum precursor to form the 166DyAu@AuNPs and 166DyPtAuNPs. The 166Dy radiolabelling efficiency was determined to be 60% and 70% for the two types of nanoparticles respectively. The retention of 166Dy and 166Ho were tested in MiliQ water or 2.5 mM DTPA for a period of 72 h. In both cases, more than 90% of both 166Dy and 166Ho was retained. The results show that the incorporation of 166Dy in AuNPs can prevent the escape of 166Ho released due to internal conversion. Conclusion We developed a chelator-free radiolabelling method for 166Dy with good radiolabelling efficiency and very high stability and retention of the daughter nuclide 166Ho. The results from this study indicate that to avoid the loss of the daughter radionuclides by internal conversion, carriers composed of electron-rich materials should be used. Supplementary Information The online version contains supplementary material available at 10.1186/s41181-022-00170-3.
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Sangkhun W, Wanwong S, Wootthikanokkhan J, Sinthiptharakoon K, Kumnorkaew P. Enhanced Water Splitting Reaction Performance using TiO
2
Deposited with Graphene Quantum Dots Grafted onto Gold Nanoparticles. ChemistrySelect 2021. [DOI: 10.1002/slct.202101445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Weradesh Sangkhun
- Materials Technology Program School of Energy Environment and Materials King Mongkut's University of Technology Thonburi (KMUTT) 126 Pracha Uthit Rd., Bang Mod Thung Khru Bangkok 10140 Thailand
| | - Sompit Wanwong
- Materials Technology Program School of Energy Environment and Materials King Mongkut's University of Technology Thonburi (KMUTT) 126 Pracha Uthit Rd., Bang Mod Thung Khru Bangkok 10140 Thailand
| | - Jatuphorn Wootthikanokkhan
- Materials Technology Program School of Energy Environment and Materials King Mongkut's University of Technology Thonburi (KMUTT) 126 Pracha Uthit Rd., Bang Mod Thung Khru Bangkok 10140 Thailand
| | - Kitiphat Sinthiptharakoon
- National Nanotechnology Center (NANOTEC) National Science and Technology Development Agency (NSTDA) 111 Thailand Science Park Pathum Thani 12120 Thailand
| | - Pisist Kumnorkaew
- National Nanotechnology Center (NANOTEC) National Science and Technology Development Agency (NSTDA) 111 Thailand Science Park Pathum Thani 12120 Thailand
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Abstract
Deep eutectic solvents (DESs) have emerged as promising green solvents, due to their versatility and properties such as high biodegradability, inexpensiveness, ease of preparation and negligible vapor pressure. Thus, DESs have been used as sustainable media and green catalysts in many chemical processes. On the other hand, lignocellulosic biomass as an abundant source of renewable carbon has received ample interest for the production of biobased chemicals. In this review, the state of the art of the catalytic use of DESs in upgrading the biomass-related substances towards biofuels and value-added chemicals is presented, and the gap in the knowledge is indicated to direct the future research.
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On the Primary Water Radicals' Production in the Presence of Gold Nanoparticles: Electron Pulse Radiolysis Study. NANOMATERIALS 2020; 10:nano10122478. [PMID: 33321905 PMCID: PMC7763946 DOI: 10.3390/nano10122478] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 12/05/2020] [Accepted: 12/08/2020] [Indexed: 01/22/2023]
Abstract
Gold nanoparticles are known to cause a radiosensitizing effect, which is a promising way to improve radiation therapy. However, the radiosensitization mechanism is not yet fully understood. It is currently assumed that gold nanoparticles can influence various physical, chemical, and biological processes. Pulse radiolysis is a powerful tool that can examine one of the proposed effects of gold nanoparticles, such as increased free radical production. In this work, we shed light on the consequence of ionizing radiation interaction with gold nanoparticles by direct measurements of solvated electrons using the pulse radiolysis technique. We found that at a therapeutically relevant gold concentration (<3 mM atomic gold, <600 μg × cm−3), the presence of gold nanoparticles in solution does not induce higher primary radicals’ formation. This result contradicts some hypotheses about free radical formation in the presence of gold nanoparticles under ionizing radiation previously reported in the literature.
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Landry C, Morrison A, Ghandi K. Application of muon and other complementary radiation techniques to study interaction of radiation with nanostructures. Radiat Phys Chem Oxf Engl 1993 2020. [DOI: 10.1016/j.radphyschem.2020.108881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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6
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Wang Y, Sun S, Luo J, Xiong Y, Ming T, Liu J, Ma Y, Yan S, Yang Y, Yang Z, Reboud J, Yin H, Cooper JM, Cai X. Low sample volume origami-paper-based graphene-modified aptasensors for label-free electrochemical detection of cancer biomarker-EGFR. MICROSYSTEMS & NANOENGINEERING 2020; 6:32. [PMID: 34567646 PMCID: PMC8433370 DOI: 10.1038/s41378-020-0146-2] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 12/04/2019] [Accepted: 02/18/2020] [Indexed: 05/08/2023]
Abstract
In this work, an electrochemical paper-based aptasensor was fabricated for label-free and ultrasensitive detection of epidermal growth factor receptor (EGFR) by employing anti-EGFR aptamers as the bio-recognition element. The device used the concept of paper-folding, or origami, to serve as a valve between sample introduction and detection, so reducing sampling volumes and improving operation convenience. Amino-functionalized graphene (NH2-GO)/thionine (THI)/gold particle (AuNP) nanocomposites were used to modify the working electrode not only to generate the electrochemical signals, but also to provide an environment conducive to aptamer immobilization. Electrochemical characterization revealed that the formation of an insulating aptamer-antigen immunocomplex would hinder electron transfer from the sample medium to the working electrode, thus resulting in a lower signal. The experimental results showed that the proposed aptasensor exhibited a linear range from 0.05 to 200 ngmL-1 (R 2 = 0.989) and a detection limit of 5 pgmL-1 for EGFR. The analytical reliability of the proposed paper-based aptasensor was further investigated by analyzing serum samples, showing good agreement with the gold-standard enzyme-linked immunosorbent assay.
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Affiliation(s)
- Yang Wang
- State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing, 100190 China
- University of Chinese Academy of Sciences, Beijing, 100190 China
| | - Shuai Sun
- State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing, 100190 China
- University of Chinese Academy of Sciences, Beijing, 100190 China
| | - Jinping Luo
- State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing, 100190 China
- University of Chinese Academy of Sciences, Beijing, 100190 China
| | - Ying Xiong
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Thoracic Surgery II, Peking University Cancer Hospital & Institute, Beijing, 100142 China
| | - Tao Ming
- State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing, 100190 China
- University of Chinese Academy of Sciences, Beijing, 100190 China
| | - Juntao Liu
- State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing, 100190 China
- University of Chinese Academy of Sciences, Beijing, 100190 China
| | - Yuanyuan Ma
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Thoracic Surgery II, Peking University Cancer Hospital & Institute, Beijing, 100142 China
| | - Shi Yan
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Thoracic Surgery II, Peking University Cancer Hospital & Institute, Beijing, 100142 China
| | - Yue Yang
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Thoracic Surgery II, Peking University Cancer Hospital & Institute, Beijing, 100142 China
| | - Zhugen Yang
- Division of Biomedical Engineering, James Watt School of Engineering, University of Glasgow, Oakfield Avenue, Glasgow, G12 8LT United Kingdom
| | - Julien Reboud
- Division of Biomedical Engineering, James Watt School of Engineering, University of Glasgow, Oakfield Avenue, Glasgow, G12 8LT United Kingdom
| | - Huabing Yin
- Division of Biomedical Engineering, James Watt School of Engineering, University of Glasgow, Oakfield Avenue, Glasgow, G12 8LT United Kingdom
| | - Jonathan M. Cooper
- Division of Biomedical Engineering, James Watt School of Engineering, University of Glasgow, Oakfield Avenue, Glasgow, G12 8LT United Kingdom
| | - Xinxia Cai
- State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing, 100190 China
- University of Chinese Academy of Sciences, Beijing, 100190 China
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7
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Ghandi K, Landry C, Du T, Lainé M, Saul A, Le Caër S. Influence of confinement on free radical chemistry in layered nanostructures. Sci Rep 2019; 9:17165. [PMID: 31748626 PMCID: PMC6868163 DOI: 10.1038/s41598-019-52662-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 10/18/2019] [Indexed: 11/08/2022] Open
Abstract
The purpose of the present work was to study how chemical reactions and the electronic structure of atoms are affected by confinement at the sub-nanometer scale. To reach this goal, we studied the H atom in talc, a layered clay mineral. Talc is a highly 2D-confining material with the width of its interlayer space close to angstrom. We investigated talc with a particle accelerator-based spectroscopic method that uses elementary particles. This technique generates an exotic atom, muonium (Mu), which can be considered as an isotope of the H atom. Moreover, the technique allows us to probe a single atom (H atom) at any time and explore the effects of the layered clay on a single ion (proton) or atom. The cation/electron recombination happens in two time windows: one faster than a nanosecond and the other one at longer than microseconds. This result suggests that two types of electron transfer processes take place in these clay minerals. Calculations demonstrated that the interlayer space acts as a catalytic surface and is the primary location of cation/electron recombination in talc. Moreover, the studies of the temperature dependence of Mu decay rates, due to the formation of the surrogate of H2, is suggestive of an "H2" formation reaction that is thermally activated above 25 K, but governed by quantum diffusion below 25 K. The experimental and computational studies of the hyperfine coupling constant of Mu suggest that it is formed in the interlayer space of talc and that its electronic structure is extremely changed due to confinement. All these results imply that the chemistry could be strongly affected by confinement in the interlayer space of clays.
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Affiliation(s)
- Khashayar Ghandi
- University of Guelph, Department of chemistry, Guelph, ON, N1G 2W1, Canada.
| | - Cody Landry
- University of Guelph, Department of chemistry, Guelph, ON, N1G 2W1, Canada
| | - Tait Du
- Université de Sherbrooke, Faculté de médecine, Sherbrooke, QC, J1H 5N4, Canada
| | - Maxime Lainé
- LIONS, NIMBE, CEA, CNRS, Université Paris Saclay, CEA Saclay, F-91191, Gif-sur-Yvette, Cedex, France
| | - Andres Saul
- Aix-Marseille University, CINaM-CNRS UMR 7325 Campus de Luminy, F-13288, Marseille, Cedex 9, France
| | - Sophie Le Caër
- LIONS, NIMBE, CEA, CNRS, Université Paris Saclay, CEA Saclay, F-91191, Gif-sur-Yvette, Cedex, France
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8
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Kalhor P, Ghandi K. Deep Eutectic Solvents for Pretreatment, Extraction, and Catalysis of Biomass and Food Waste. Molecules 2019; 24:E4012. [PMID: 31698717 PMCID: PMC6891572 DOI: 10.3390/molecules24224012] [Citation(s) in RCA: 102] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Revised: 10/28/2019] [Accepted: 11/04/2019] [Indexed: 12/14/2022] Open
Abstract
Valorization of lignocellulosic biomass and food residues to obtain valuable chemicals is essential to the establishment of a sustainable and biobased economy in the modern world. The latest and greenest generation of ionic liquids (ILs) are deep eutectic solvents (DESs) and natural deep eutectic solvents (NADESs); these have shown great promise for various applications and have attracted considerable attention from researchers who seek versatile solvents with pretreatment, extraction, and catalysis capabilities in biomass- and biowaste-to-bioenergy conversion processes. The present work aimed to review the use of DESs and NADESs in the valorization of biomass and biowaste as pretreatment or extraction solvents or catalysis agents.
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Affiliation(s)
- Payam Kalhor
- MOE Key Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China;
| | - Khashayar Ghandi
- Department of Chemistry, University of Guelph, Guelph, ON N1G 2W1, Canada
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9
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D'Andrea F, Nuti E, Becherini S, Cuffaro D, Husanu E, Camodeca C, De Vita E, Zocchi MR, Poggi A, D'Arrigo C, Cappello V, Gemmi M, Nencetti S, Chiappe C, Rossello A. Design and Synthesis of Ionic Liquid-Based Matrix Metalloproteinase Inhibitors (MMPIs): A Simple Approach to Increase Hydrophilicity and to Develop MMPI-Coated Gold Nanoparticles. ChemMedChem 2019; 14:686-698. [PMID: 30600908 DOI: 10.1002/cmdc.201800733] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Indexed: 11/09/2022]
Abstract
Selective and potent matrix metalloproteinase 12 (MMP-12) inhibitors endowed with improved hydrophilicity are highly sought for potential use in the treatment of lung and cardiovascular diseases. In the present paper, we modified the structure of a nanomolar MMP-12 inhibitor by incorporating an ionic liquid (IL) moiety to improve aqueous solubility. Four biologically active salts were obtained by linking the sulfonamide moiety of the MMP-12 inhibitor to imidazolium-, pyrrolidinium-, piperidinium-, and DABCO-based ILs. The imidazolium-based bioactive salt was tested on human recombinant MMPs and on monocyte-derived dendritic cells, showing activity similar to that of the parent compound, but improved water solubility. The imidazolium-based bioactive salt was then used to prepare electrostatically stabilized MMP inhibitor-coated gold nanoparticles (AuNPs) able to selectively bind MMP-12. These AuNPs were used to study subcellular localization of MMP-12 in monocyte-derived dendritic cells by transmission electron microscopy analysis.
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Affiliation(s)
- Felicia D'Andrea
- Department of Pharmacy, University of Pisa, via Bonanno 6/33, 56126, Pisa, Italy
| | - Elisa Nuti
- Department of Pharmacy, University of Pisa, via Bonanno 6/33, 56126, Pisa, Italy
| | - Stefano Becherini
- Department of Pharmacy, University of Pisa, via Bonanno 6/33, 56126, Pisa, Italy
| | - Doretta Cuffaro
- Department of Pharmacy, University of Pisa, via Bonanno 6/33, 56126, Pisa, Italy
| | - Elena Husanu
- Department of Pharmacy, University of Pisa, via Bonanno 6/33, 56126, Pisa, Italy
| | - Caterina Camodeca
- Department of Pharmacy, University of Pisa, via Bonanno 6/33, 56126, Pisa, Italy
| | - Elena De Vita
- Department of Pharmacy, University of Pisa, via Bonanno 6/33, 56126, Pisa, Italy
| | - Maria Raffaella Zocchi
- Division of Immunology, Transplants and Infectious Diseases, San Raffaele Scientific Institute, via Olgettina 60, 20132, Milan, Italy
| | - Alessandro Poggi
- Unit of Molecular Oncology and Angiogenesis, IRCCS AOU San Martino-IST, Largo Rosanna Benzi 10, 16132, Genoa, Italy
| | - Cristina D'Arrigo
- Istituto per lo Studio delle Macromolecole, CNR, Via De Marini 6, 16149, Genoa, Italy
| | - Valentina Cappello
- Istituto Italiano di Tecnologia, Center for Nanotechnology Innovation@NEST, Piazza San Silvestro 12, Pisa, Italy
| | - Mauro Gemmi
- Istituto Italiano di Tecnologia, Center for Nanotechnology Innovation@NEST, Piazza San Silvestro 12, Pisa, Italy
| | - Susanna Nencetti
- Department of Pharmacy, University of Pisa, via Bonanno 6/33, 56126, Pisa, Italy
| | - Cinzia Chiappe
- Department of Pharmacy, University of Pisa, via Bonanno 6/33, 56126, Pisa, Italy
| | - Armando Rossello
- Department of Pharmacy, University of Pisa, via Bonanno 6/33, 56126, Pisa, Italy
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10
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Abstract
The ionizing radiation in aqueous solutions of gold nanoparticles, stabilized by electrostatic non-covalent intermolecular forces and steric interactions, with antimicrobial compounds, are investigated with picosecond pulse radiolysis techniques. Upon pulse radiolysis of an aqueous solution containing very low concentrations of gold nanoparticles with naked surfaces available in water (not obstructed by chemical bonds), a change to Cerenkov spectrum over a large range of wavelengths are observed and pre-solvated electrons are captured by gold nanoparticles exclusively (not by ionic liquid surfactants used to stabilize the nanoparticles). The solvated electrons are also found to decay rapidly compared with the decay kinetics in water. These very fast reactions with electrons in water could provide an enhanced oxidizing zone around gold nanoparticles and this could be the reason for radio sensitizing behavior of gold nanoparticles in radiation therapy.
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11
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Poštulka J, Slavíček P, Fedor J, Fárník M, Kočišek J. Energy Transfer in Microhydrated Uracil, 5-Fluorouracil, and 5-Bromouracil. J Phys Chem B 2017; 121:8965-8974. [DOI: 10.1021/acs.jpcb.7b07390] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J. Poštulka
- Department
of Physical Chemistry, University of Chemistry and Technology, Technická
5, Prague 6, Czech Republic
| | - P. Slavíček
- Department
of Physical Chemistry, University of Chemistry and Technology, Technická
5, Prague 6, Czech Republic
- J.
Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic
| | - J. Fedor
- J.
Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic
| | - M. Fárník
- J.
Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic
| | - J. Kočišek
- J.
Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic
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12
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Maguire P, Rutherford D, Macias-Montero M, Mahony C, Kelsey C, Tweedie M, Pérez-Martin F, McQuaid H, Diver D, Mariotti D. Continuous In-Flight Synthesis for On-Demand Delivery of Ligand-Free Colloidal Gold Nanoparticles. NANO LETTERS 2017; 17:1336-1343. [PMID: 28139927 DOI: 10.1021/acs.nanolett.6b03440] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We demonstrate an entirely new method of nanoparticle chemical synthesis based on liquid droplet irradiation with ultralow (<0.1 eV) energy electrons. While nanoparticle formation via high energy radiolysis or transmission electron microscopy-based electron bombardment is well-understood, we have developed a source of electrons with energies close to thermal which leads to a number of important and unique benefits. The charged species, including the growing nanoparticles, are held in an ultrathin surface reaction zone which enables extremely rapid precursor reduction. In a proof-of-principle demonstration, we obtain small-diameter Au nanoparticles (∼4 nm) with tight control of polydispersity, in under 150 μs. The precursor was almost completely reduced in this period, and the resultant nanoparticles were water-soluble and free of surfactant or additional ligand chemistry. Nanoparticle synthesis rates within the droplets were many orders of magnitude greater than equivalent rates reported for radiolysis, electron beam irradiation, or colloidal chemical synthesis where reaction times vary from seconds to hours. In our device, a stream of precursor loaded microdroplets, ∼15 μm in diameter, were transported rapidly through a cold atmospheric pressure plasma with a high charge concentration. A high electron flux, electron and nanoparticle confinement at the surface of the droplet, and the picoliter reactor volume are thought to be responsible for the remarkable enhancement in nanoparticle synthesis rates. While this approach exhibits considerable potential for scale-up of synthesis rates, it also offers the more immediate prospect of continuous on-demand delivery of high-quality nanomaterials directly to their point of use by avoiding the necessity of collection, recovery, and purification. A range of new applications can be envisaged, from theranostics and biomedical imaging in tissue to inline catalyst production for pollution remediation in automobiles.
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Affiliation(s)
- Paul Maguire
- NIBEC, University of Ulster , Belfast, BT37 0QB, Northern Ireland
| | - David Rutherford
- NIBEC, University of Ulster , Belfast, BT37 0QB, Northern Ireland
| | | | - Charles Mahony
- NIBEC, University of Ulster , Belfast, BT37 0QB, Northern Ireland
| | - Colin Kelsey
- NIBEC, University of Ulster , Belfast, BT37 0QB, Northern Ireland
| | - Mark Tweedie
- NIBEC, University of Ulster , Belfast, BT37 0QB, Northern Ireland
| | | | - Harold McQuaid
- NIBEC, University of Ulster , Belfast, BT37 0QB, Northern Ireland
| | - Declan Diver
- SUPA, School of Physics and Astronomy, University of Glasgow , Glasgow G12 8QQ, United Kingdom
| | - Davide Mariotti
- NIBEC, University of Ulster , Belfast, BT37 0QB, Northern Ireland
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Krishnamurthy S, Reddy DHK, Sankar G, Yun YS. Facile room temperature deposition of gold nanoparticle-ionic liquid hybrid film on silica substrate. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 170:48-55. [PMID: 27415970 DOI: 10.1016/j.saa.2016.07.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 06/30/2016] [Accepted: 07/05/2016] [Indexed: 06/06/2023]
Abstract
This work presents facile synthesis of gold nanoparticle (Au NP)-ionic liquid hybrid film of <10nm by a simple two-step process at room temperature by deposition of Au NPs suspended in 1-hexyl-1methyl-pyrolidinium bromide, on Si (111) substrates. FTIR results demonstrated that ionic liquid properties remain unaltered during and after Au NP synthesis, and even coating on Si (111) substrate. XRD, XPS, and XAS spectral data confirm the presence of Au(0) while EXAFS data indicated the presence of small particles or incomplete surface species. Cross-sectional analysis using FE-SEM and edge length measurement using AFM showed that the film thickness is ca 10nm.
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Affiliation(s)
- S Krishnamurthy
- Department of Bioprocess Engineering, Chonbuk National University, Jeonbuk 561-756, Republic of Korea
| | - D Harikishore Kumar Reddy
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonbuk 561-756, Republic of Korea.
| | - G Sankar
- Department of Chemistry and London Centre for Nanotechnology, University College London, London, WC1E 6BT, UK
| | - Yeoung-Sang Yun
- Department of Bioprocess Engineering, Chonbuk National University, Jeonbuk 561-756, Republic of Korea; Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonbuk 561-756, Republic of Korea.
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