1
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Gentry NE, Kurimoto A, Cui K, Cleron JL, Xiang CM, Hammes-Schiffer S, Mayer JM. Hydrogen on Colloidal Gold Nanoparticles. J Am Chem Soc 2024; 146:14505-14520. [PMID: 38743444 DOI: 10.1021/jacs.4c00507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
Colloidal gold nanoparticles (AuNPs) have myriad scientific and technological applications, but their fundamental redox chemistry is underexplored. Reported here are titration studies of oxidation and reduction reactions of aqueous AuNP colloids, which show that the AuNPs bind substantial hydrogen (electrons + protons) under mild conditions. The 5 nm AuNPs are reduced to a similar extent with reductants from borohydrides to H2 and are reoxidized back essentially to their original state by oxidants, including O2. The reactions were monitored via surface plasmon resonance (SPR) optical absorption, which was shown to be much more sensitive to surface H than to changes in solution conditions. Reductions with H2 occurred without pH changes, demonstrating that hydrogenation forms surface H rather than releasing H+. Computational studies suggested that an SPR blueshift was expected for H atom addition, while just electron addition likely would have caused a redshift. Titrations consistently showed a maximum redox change of the 5 nm NPs, independent of the reagent, corresponding to 9% of the total gold or ∼30% hydrogen surface coverage (∼370 H per AuNP). Larger AuNPs showed smaller maximum fractional surface coverages. We conclude that H binds to the edge, corner, and defect sites of the AuNPs, which explains the stoichiometric limitation and the size effect. The finding of substantial and stable hydrogen on the AuNP surface under mild reducing conditions has potential implications for various applications of AuNPs in reducing environments, from catalysis to biomedicine. This finding contrasts with the behavior of bulk gold and with the typical electron-focused perspective in this field.
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Affiliation(s)
- Noreen E Gentry
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Aiko Kurimoto
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Kai Cui
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Jamie L Cleron
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Claire M Xiang
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Sharon Hammes-Schiffer
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - James M Mayer
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
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2
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Tanudji J, Kasai H, Okada M, Ogawa T, Aspera SM, Nakanishi H. 211At on gold nanoparticles for targeted radionuclide therapy application. Phys Chem Chem Phys 2024; 26:12915-12927. [PMID: 38629229 DOI: 10.1039/d3cp05326a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Targeted alpha therapy (TAT) is a methodology that is being developed as a promising cancer treatment using the α-particle decay of radionuclides. This technique involves the use of heavy radioactive elements being placed near the cancer target area to cause maximum damage to the cancer cells while minimizing the damage to healthy cells. Using gold nanoparticles (AuNPs) as carriers, a more effective therapy methodology may be realized. AuNPs can be good candidates for transporting these radionuclides to the vicinity of the cancer cells since they can be labeled not just with the radionuclides, but also a host of other proteins and ligands to target these cells and serve as additional treatment options. Research has shown that astatine and iodine are capable of adsorbing onto the surface of gold, creating a covalent bond that is quite stable for use in experiments. However, there are still many challenges that lie ahead in this area, whether they be theoretical, experimental, and even in real-life applications. This review will cover some of the major developments, as well as the current state of technology, and the problems that need to be tackled as this research topic moves along to maturity. The hope is that with more workers joining the field, we can make a positive impact on society, in addition to bringing improvement and more knowledge to science.
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Affiliation(s)
- Jeffrey Tanudji
- Department of Applied Physics, The University of Osaka, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Hideaki Kasai
- Institute of Radiation Sciences, The University of Osaka, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan.
| | - Michio Okada
- Institute of Radiation Sciences, The University of Osaka, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan.
- Department of Chemistry, The University of Osaka, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Tetsuo Ogawa
- Institute of Radiation Sciences, The University of Osaka, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan.
- Department of Physics, The University of Osaka, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Susan M Aspera
- Research Initiative for Supra-Materials, Shinshu University, 4-17-1 Wakasato, Nagano, Nagano 380-8553, Japan
| | - Hiroshi Nakanishi
- National Institute of Technology, Akashi College, 679-3 Nishioka, Uozumi-cho, Akashi, Hyogo 674-8501, Japan
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3
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Sarkar S, Jagirdar BR. Monodisperse Ag, Au Nanoparticles via Solvated Metal Atom Dispersion and Digestive Ripening in Ionic Liquid. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:7620-7631. [PMID: 38526315 DOI: 10.1021/acs.langmuir.4c00284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/26/2024]
Abstract
Digestive ripening (DR) is a postsynthetic protocol for the transformation of a colloid consisting of polydisperse metal nanoparticles (NPs) into a colloid composed of nearly monodisperse metal nanoparticles. This process is brought about by the digestive ripening agent, typically an organic ligand with a long alkyl chain at one end and a functional group at the other, at the boiling point of the solvent in which it is carried out, requiring long periods of time. In this work, digestive ripening of polydisperse Ag and Au nanoparticles brought about by ionic liquids (ILs) under very mild conditions (∼273 K, ∼30 min) to obtain nearly monodisperse nanoparticles has been demonstrated. Herein, the ionic liquid plays a dual role, as a digestive ripening and a stabilizing agent for the nanoparticles. Ionic liquid-assisted digestive ripening under such mild temperatures and short period of time has hitherto not been reported.
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Affiliation(s)
- Saibalendu Sarkar
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Balaji R Jagirdar
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
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4
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Sedano Varo E, Egeberg Tankard R, Kryger-Baggesen J, Jinschek J, Helveg S, Chorkendorff I, Damsgaard CD, Kibsgaard J. Gold Nanoparticles for CO 2 Electroreduction: An Optimum Defined by Size and Shape. J Am Chem Soc 2024; 146:2015-2023. [PMID: 38196113 PMCID: PMC10811675 DOI: 10.1021/jacs.3c10610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 12/19/2023] [Accepted: 12/19/2023] [Indexed: 01/11/2024]
Abstract
Understanding the size-dependent behavior of nanoparticles is crucial for optimizing catalytic performance. We investigate the differences in selectivity of size-selected gold nanoparticles for CO2 electroreduction with sizes ranging from 1.5 to 6.5 nm. Our findings reveal an optimal size of approximately 3 nm that maximizes selectivity toward CO, exhibiting up to 60% Faradaic efficiency at low potentials. High-resolution transmission electron microscopy reveals different shapes for the particles and suggests that multiply twinned nanoparticles are favorable for CO2 reduction to CO. Our analysis shows that twin boundaries pin 8-fold coordinated surface sites and in turn suggests that a variation of size and shape to optimize the abundance of 8-fold coordinated sites is a viable path for optimizing the CO2 electrocatalytic reduction to CO. This work contributes to the advancement of nanocatalyst design for achieving tunable selectivity for CO2 conversion into valuable products.
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Affiliation(s)
- Esperanza Sedano Varo
- Department
of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - Rikke Egeberg Tankard
- Department
of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - Joakim Kryger-Baggesen
- Center
for Visualizing Catalytic Processes (VISION), Department of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - Joerg Jinschek
- Center
for Visualizing Catalytic Processes (VISION), Department of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
- National
Centre for Nano Fabrication and Characterization, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - Stig Helveg
- Center
for Visualizing Catalytic Processes (VISION), Department of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - Ib Chorkendorff
- Department
of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - Christian Danvad Damsgaard
- Department
of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
- Center
for Visualizing Catalytic Processes (VISION), Department of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
- National
Centre for Nano Fabrication and Characterization, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - Jakob Kibsgaard
- Department
of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
- Center
for Visualizing Catalytic Processes (VISION), Department of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
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5
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Peng Y, Qiu B, Ding S, Hu M, Zhang Y, Jiao Y, Fan X, Parlett CMA. A Facile Synthesis Route to AuPd Alloys for the Selective Oxidation of 5-Hydroxymethylfurfural to 2,5-Furandicarboxylic Acid. Chempluschem 2024; 89:e202300545. [PMID: 37884457 DOI: 10.1002/cplu.202300545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 10/05/2023] [Indexed: 10/28/2023]
Abstract
Synthesis of 2,5-furandicarboxylic acid (FDCA) can be achieved via catalytic oxidation of 5-hydroxymethylfurfural (5-HMF), in which both base and catalyst play important roles. This work presents the development of a simple synthesis method (based on a commercial parent 10 wt.% Pd/C catalyst) to prepare the bimetallic AuPd alloy catalysts (i. e., AuPd/C) for selective 5-HMF oxidation to FDCA. When using the strong base of NaOH, Pd and Au cooperate to promote FDCA formation when deployed either separately (as a physical mixture of the monometallic Au/C and Pd/C catalysts) or ideally alloyed (AuPd/C), with complete 5-HMF conversion and FDCA yields of 66 % vs 77 %, respectively. However, NaOH also promoted the formation of undesired by-products, leading to poor mass balances (<81 %). Comparatively, under weak base conditions (using NaHCO3 ), an increase in Au loading in the AuPd/C catalysts enhances 5-HMF conversion and FDCA productivity (due to the enhanced carbonyl oxidation capacity) which coincides with a superior mass balances of >97 %. Yet, the excessive Pd content in the AuPd/C catalysts was not beneficial in promoting FDCA formation.
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Affiliation(s)
- Yani Peng
- Department of Chemical Engineering, School of Engineering, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Boya Qiu
- Department of Chemical Engineering, School of Engineering, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Shengzhe Ding
- Department of Chemical Engineering, School of Engineering, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Min Hu
- Department of Chemical Engineering, School of Engineering, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Yuxin Zhang
- Department of Chemical Engineering, School of Engineering, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Yilai Jiao
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China
| | - Xiaolei Fan
- Department of Chemical Engineering, School of Engineering, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Christopher M A Parlett
- Department of Chemical Engineering, School of Engineering, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
- Diamond Light Source Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, UK
- University of Manchester at Harwell, Diamond Light Source Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, UK
- UK Catalysis Hub, Research Complex at Harwell, Rutherford Appleton Laboratory, Harwell, Oxfordshire, OX11 0FA, UK
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6
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Marín-Aguilar S, Camerin F, van der Ham S, Feasson A, Vutukuri HR, Dijkstra M. A colloidal viewpoint on the sausage catastrophe and the finite sphere packing problem. Nat Commun 2023; 14:7896. [PMID: 38036561 PMCID: PMC10689752 DOI: 10.1038/s41467-023-43722-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 11/16/2023] [Indexed: 12/02/2023] Open
Abstract
It is commonly believed that the most efficient way to pack a finite number of equal-sized spheres is by arranging them tightly in a cluster. However, mathematicians have conjectured that a linear arrangement may actually result in the densest packing. Here, our combined experimental and simulation study provides a physical realization of the finite sphere packing problem by studying arrangements of colloids in a flaccid lipid vesicle. We map out a state diagram displaying linear, planar, and cluster conformations of spheres, as well as bistable states which alternate between cluster-plate and plate-linear conformations due to membrane fluctuations. Finally, by systematically analyzing truncated polyhedral packings, we identify clusters of 56 ≤ N ≤ 70 number of spheres, excluding N = 57 and 63, that pack more efficiently than linear arrangements.
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Affiliation(s)
- Susana Marín-Aguilar
- Soft Condensed Matter & Biophysics, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, Utrecht, 3584 CC, Utrecht, The Netherlands.
| | - Fabrizio Camerin
- Soft Condensed Matter & Biophysics, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, Utrecht, 3584 CC, Utrecht, The Netherlands.
- International Institute for Sustainability with Knotted Chiral Meta Matter (WPI-SKCM²), Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, 739-8526, Hiroshima, Japan.
| | - Stijn van der Ham
- Active Soft Matter and Bio-inspired Materials Lab, Faculty of Science and Technology, MESA+ Institute, University of Twente, 7500 AE, Enschede, The Netherlands
| | - Andréa Feasson
- Active Soft Matter and Bio-inspired Materials Lab, Faculty of Science and Technology, MESA+ Institute, University of Twente, 7500 AE, Enschede, The Netherlands
| | - Hanumantha Rao Vutukuri
- Active Soft Matter and Bio-inspired Materials Lab, Faculty of Science and Technology, MESA+ Institute, University of Twente, 7500 AE, Enschede, The Netherlands.
| | - Marjolein Dijkstra
- Soft Condensed Matter & Biophysics, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, Utrecht, 3584 CC, Utrecht, The Netherlands.
- International Institute for Sustainability with Knotted Chiral Meta Matter (WPI-SKCM²), Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, 739-8526, Hiroshima, Japan.
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7
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Fronzi M, Amos RD, Kobayashi R. Evaluation of Machine Learning Interatomic Potentials for Gold Nanoparticles-Transferability towards Bulk. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1832. [PMID: 37368262 DOI: 10.3390/nano13121832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 05/22/2023] [Accepted: 06/06/2023] [Indexed: 06/28/2023]
Abstract
We analyse the efficacy of machine learning (ML) interatomic potentials (IP) in modelling gold (Au) nanoparticles. We have explored the transferability of these ML models to larger systems and established simulation times and size thresholds necessary for accurate interatomic potentials. To achieve this, we compared the energies and geometries of large Au nanoclusters using VASP and LAMMPS and gained better understanding of the number of VASP simulation timesteps required to generate ML-IPs that can reproduce the structural properties. We also investigated the minimum atomic size of the training set necessary to construct ML-IPs that accurately replicate the structural properties of large Au nanoclusters, using the LAMMPS-specific heat of the Au147 icosahedral as reference. Our findings suggest that minor adjustments to a potential developed for one system can render it suitable for other systems. These results provide further insight into the development of accurate interatomic potentials for modelling Au nanoparticles through machine learning techniques.
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Affiliation(s)
- Marco Fronzi
- School of Chemical and Biomedical Engineering, University of Melbourne, Parkville, VIC 3010, Australia
- School of Mathematical and Physical Sciences, University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Roger D Amos
- School of Mathematical and Physical Sciences, University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Rika Kobayashi
- Supercomputer Facility, Australian National University, Canberra, ACT 2601, Australia
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8
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Zhang Q, Wang M, Hu X, Yan A, Ho PL, Li H, Sun H. Gold drugs as colistin adjuvants in the fight against MCR-1 producing bacteria. J Biol Inorg Chem 2023; 28:225-234. [PMID: 36662362 DOI: 10.1007/s00775-022-01983-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 11/22/2022] [Indexed: 01/21/2023]
Abstract
The emergence and rapid spread of the mobile colistin resistance gene mcr-1 among bacterial species and hosts significantly challenge the efficacy of "last-line" antibiotic colistin. Previously, we reported silver nitrate and auranofin serve as colistin adjuvants for combating mcr-1-positive bacteria. Herein, we uncovered more gold-based drugs and nanoparticles, and found that they exhibited varying degree of synergisms with colistin on killing mcr-1-positive bacteria. However, pre-activation of the drugs by either glutathione or N-acetyl cysteine, thus releasing and accumulating gold ions, is perquisite for their abilities to substitute zinc cofactor from MCR-1 enzyme. X-ray crystallography and biophysical studies further supported the proposed mechanism. This study not only provides basis for combining gold-based drugs and colistin for combating mcr-1-positive bacterial infections, but also undoubtedly opens a new horizon for metabolism details of gold-based drugs in overcoming antimicrobial resistance.
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Affiliation(s)
- Qi Zhang
- Department of Chemistry and CAS-HKU Joint Laboratory of Metallomics On Health and Environment, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
| | - Minji Wang
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, China
| | - Xuqiao Hu
- Department of Chemistry and CAS-HKU Joint Laboratory of Metallomics On Health and Environment, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
| | - Aixin Yan
- School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
| | - Pak-Leung Ho
- Carol Yu Centre for Infection, The University of Hong Kong, Sassoon Road, Hong Kong SAR, China.,Department of Microbiology, The University of Hong Kong, Sassoon Road, Hong Kong SAR, China
| | - Hongyan Li
- Department of Chemistry and CAS-HKU Joint Laboratory of Metallomics On Health and Environment, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China.
| | - Hongzhe Sun
- Department of Chemistry and CAS-HKU Joint Laboratory of Metallomics On Health and Environment, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China.
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9
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Costanzo H, Gooch J, Frascione N. Nanomaterials for optical biosensors in forensic analysis. Talanta 2023; 253:123945. [PMID: 36191514 DOI: 10.1016/j.talanta.2022.123945] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 09/02/2022] [Accepted: 09/14/2022] [Indexed: 12/13/2022]
Abstract
Biosensors are compact analytical devices capable of transducing a biological interaction event into a measurable signal outcome in real-time. They can provide sensitive and affordable analysis of samples without the need for additional laboratory equipment or complex preparation steps. Biosensors may be beneficial for forensic analysis as they can facilitate large-scale high-throughput, sensitive screening of forensic samples to detect target molecules that are of high evidential value. Nanomaterials are gaining attention as desirable components of biosensors that can enhance detection and signal efficiency. Biosensors that incorporate nanomaterials within their design have been widely reported and developed for medical purposes but are yet to find routine employment within forensic science despite their proven potential. In this article, key examples of the use of nanomaterials within optical biosensors designed for forensic analysis are outlined. Their design and mechanism of detection are both considered throughout, discussing how nanomaterials can enhance the detection of the target analyte. The critical evaluation of the optical biosensors detailed within this review article should help to guide future optical biosensor design via the incorporation of nanomaterials, for not only forensic analysis but alternative analytical fields where such biosensors may prove a valuable addition to current workflows.
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Affiliation(s)
- Hayley Costanzo
- Department of Analytical, Environmental & Forensic Sciences, King's College London, 150 Stamford Street, London, SE1 9NH, UK
| | - James Gooch
- Department of Analytical, Environmental & Forensic Sciences, King's College London, 150 Stamford Street, London, SE1 9NH, UK
| | - Nunzianda Frascione
- Department of Analytical, Environmental & Forensic Sciences, King's College London, 150 Stamford Street, London, SE1 9NH, UK.
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10
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On thermal stability and decomposition mechanisms of aromatic diamines employed as links in novel Pt nanoparticle network catalysts. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2022.130436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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11
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Elimination of Indoor Volatile Organic Compounds on Au/SBA-15 Catalysts: Insights into the Nature, Size, and Dispersion of the Active Sites and Reaction Mechanism. Catalysts 2022. [DOI: 10.3390/catal12111365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Gold catalysts, with different particle sizes ranging from 19 to 556 Å, and supported on SBA-15 mesoporous silica, were prepared by using deposition-precipitation, co-precipitation, and impregnation methods. All samples were characterised by TEM, EXAFS, XPS, XRD, CFR (Continuous Flow Reactor), and TPR. The sample which proved to have the highest activity was characterised by TAP (Temporal Analysis of Products) as well. XPS, wide-angle XRD, EXAFS, and H2-TPR measurements and data analysis confirmed that gold was present as Au0 only on all samples. The size of the Au nanoparticle was determined from TEM measurements and confirmed through wide-angle XRD measurements. EXAFS measurements showed that as the Au-Au coordination number decreased the Au-Au bond length decreased. TEM data analysis revealed a dispersion range from 58% (for the smallest particle size) to 2% (for the highest particle size). For Au particles’ sized lower that 60 Å, the Au dispersion was determined using a literature correlation between the dispersion and EXAFS Au-Au coordination number, and was in good agreement with the dispersion data obtained from TEM. The Au dispersion decreased as the particle size increased. CFR experiments validated the relationship between the size of the gold particles in a sample and the sample’s catalytic activity towards acetone oxidation. The lowest temperature for the acetone 100% conversion, i.e., 250 °C, was observed over the reduced catalyst sample with the smallest particle size. This sample not only showed the highest catalytic activity towards acetone conversion, but, at the same time, showed high reaction stability, as catalyst lifetime tests, performed for 25 h in a CFR at 270 °C for the as-synthesised sample, and at 220 °C for the reduced sample, have confirmed. TAP (Temporal Analysis of Products) measurements and data analysis confirmed a weak competitive adsorption of acetone and oxygen over the Au/SBA-15 sample. Based on TAP data, a combination of Eley–Rideal and Langmuir–Hinshelwood mechanisms for acetone complete oxidation was proposed.
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12
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Eom E, Song M, Kim JC, Kwon DI, Rainer DN, Gołąbek K, Nam SC, Ryoo R, Mazur M, Jo C. Confining Gold Nanoparticles in Preformed Zeolites by Post-Synthetic Modification Enhances Stability and Catalytic Reactivity and Selectivity. JACS AU 2022; 2:2327-2338. [PMID: 36311841 PMCID: PMC9597593 DOI: 10.1021/jacsau.2c00380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 09/08/2022] [Accepted: 09/09/2022] [Indexed: 06/16/2023]
Abstract
Confining Au nanoparticles (NPs) in a restricted space (e.g., zeolite micropores) is a promising way of overcoming their inherent thermal instability and susceptibility to aggregation, which limit catalytic applications. However, such approaches involve complex, multistep encapsulation processes. Here, we describe a successful strategy and its guiding principles for confining small (<2 nm) and monodisperse Au NPs within commercially available beta and MFI zeolites, which can oxidize CO at 40 °C and show size-selective catalysis. This protocol involves post-synthetic modification of the zeolite internal surface with thiol groups, which confines AuCl x species inside microporous frameworks during the activation process whereby Au precursors are converted into Au nanoparticles. The resulting beta and MFI zeolites contain uniformly dispersed Au NPs throughout the void space, indicating that the intrinsic stability of the framework promotes resistance to sintering. By contrast, in situ scanning transmission electron microscopy (STEM) studies evidenced that Au precursors in bare zeolites migrate from the matrix to the external surface during activation, thereby forming large and poorly dispersed agglomerates. Furthermore, the resistance of confined Au NPs against sintering is likely relevant to the intrinsic stability of the framework, supported by extended X-ray absorption fine structure (EXAFS), H2 chemisorption, and CO Fourier transform infrared (FT-IR) studies. The Au NPs supported on commercial MFI maintain their uniform dispersity to a large extent after treatment at 700 °C that sinters Au clusters on mesoporous silicas or beta zeolites. Low-temperature CO oxidation and size-selective reactions highlight that most gold NPs are present inside the zeolite matrix with a diameter smaller than 2 nm. These findings illustrate how confinement favors small, uniquely stable, and monodisperse NPs, even for metals such as Au susceptible to cluster growth under conditions often required for catalytic use. Moreover, this strategy may be readily adapted to other zeolite frameworks that can be functionalized by thiol groups.
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Affiliation(s)
- Eunji Eom
- Department
of Chemistry and Chemical Engineering, Inha
University, 100 Inha-ro, Michuhol-gu, Incheon 22212, Republic of Korea
| | - Minseok Song
- Department
of Chemistry and Chemical Engineering, Inha
University, 100 Inha-ro, Michuhol-gu, Incheon 22212, Republic of Korea
| | - Jeong-Chul Kim
- Center
for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Dong-il Kwon
- Department
of Chemistry and Chemical Engineering, Inha
University, 100 Inha-ro, Michuhol-gu, Incheon 22212, Republic of Korea
| | - Daniel N. Rainer
- Department
of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 43 Prague, Czech Republic
| | - Kinga Gołąbek
- Department
of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 43 Prague, Czech Republic
| | - Sung Chan Nam
- Greenhouse
Gas Research Laboratory, Korea Institute
of Energy Research, Daejeon 34129, Republic of Korea
| | - Ryong Ryoo
- KENTECH
Laboratory for Chemical, Environmental and
Climate Technology, Korea Institute of Energy Technology (KENTECH), 200 Hyeoksin-ro, Naju 58330, Republic
of Korea
| | - Michal Mazur
- Department
of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 43 Prague, Czech Republic
| | - Changbum Jo
- Department
of Chemistry and Chemical Engineering, Inha
University, 100 Inha-ro, Michuhol-gu, Incheon 22212, Republic of Korea
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13
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Palajonnala Narasaiah B, Banoth P, Bustamante Dominguez AG, Mandal BK, Kumar CK, Barnes CHW, De Los Santos Valladares L, Kollu P. Biogenic Photo-Catalyst TiO 2 Nanoparticles for Remediation of Environment Pollutants. ACS OMEGA 2022; 7:26174-26189. [PMID: 35936468 PMCID: PMC9352162 DOI: 10.1021/acsomega.2c01763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Accepted: 07/07/2022] [Indexed: 06/15/2023]
Abstract
This article reports a benign environmentally friendly fabrication method of titanium dioxide (TDO) nanoparticles (named TDO NPs3, TDO NPs5, and TDO NPs8) using aqueous extract of durva herb waste. This synthesis process avoids use of harmful substances and persistent chemicals throughout the order and enables us to control the size of the nanomaterials. Characterization of TDO nanoparticles was analyzed by ultraviolet-visible spectroscopy, X-ray diffraction, and Fourier transform infrared spectroscopy. The morphological nature of the TDO samples was inspected by transmission electron microscopy, which indicated that the TDO NPs3, TDO NPs5, and TDO NPs8 were spherical in shape, with average sizes of 5.14, 12.54, and 29.61 nm, respectively. The stability of TDO nanoparticles was assessed using thermogravimetric analysis and dynamic light scattering analysis. These samples could be used for degradation of polluting industrial textile dyes, such as methylene blue (MB) and rhodamine B (Rh-B). Remarkably, the TDO NPs3 sample (5.14 nm size) exhibits a noticeable degradation of the MB dye in a shorter time period (50 min) than the TDO NPs8 sample with a size of 29.61 nm (120 min). The TDO NPs3 sample was also tested for degradation of Rh-B dye, showing high degradation efficiency over a short period of time (60 min). In contrast, the TDO NPs8 sample showed degradation of the Rh-B dye in 120 min. The effect of the dye concentration and the catalyst dose to remove dye pollutants has also been investigated. The synthesized TDO NPs act as exceptional catalysts for the degradation of dyes, and they are promising materials for the degradation of industrial polluting dyes.
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Affiliation(s)
- Boya Palajonnala Narasaiah
- CASEST,
School of Physics, University of Hyderabad, Prof. C. R Rao Road, Gachibowli, Hyderabad 500046, Telangana, India
- Laboratorio
de Cerámicos y Nanomateriales, Facultad de Ciencias Físicas, Universidad Nacional Mayor de San Marcos, Ap. Postal 14-0149, Lima 15081, Peru
| | - Pravallika Banoth
- School
of Physics, University of Hyderabad, Prof. C. R Rao Road, Gachibowli, Hyderabad 500046, Telangana, India
| | - Angel Guillermo Bustamante Dominguez
- Laboratorio
de Cerámicos y Nanomateriales, Facultad de Ciencias Físicas, Universidad Nacional Mayor de San Marcos, Ap. Postal 14-0149, Lima 15081, Peru
| | - Badal Kumar Mandal
- Department
of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore 632014, Tamil
Nadu, India
| | - Challa Kiran Kumar
- Technology
Mission Division, Department of Science and Technology, Ministry of
Science and Technology, MoS&T, New Delhi 110030, India
| | - Crispin H. W. Barnes
- Cavendish
Laboratory, Department of Physics, University
of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE 2, U.K.
| | - Luis De Los Santos Valladares
- Cavendish
Laboratory, Department of Physics, University
of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE 2, U.K.
- School of
Materials Science and Engineering, Northeastern
University, No 11, Lane
3, Wenhua Road, Heping District, Shenyang, Liaoning 110819, People’s Republic of China
| | - Pratap Kollu
- CASEST,
School of Physics, University of Hyderabad, Prof. C. R Rao Road, Gachibowli, Hyderabad 500046, Telangana, India
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14
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Hajibabaei A, Umer M, Anand R, Ha M, Kim KS. Fast atomic structure optimization with on-the-fly sparse Gaussian process potentials . JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:344007. [PMID: 35675808 DOI: 10.1088/1361-648x/ac76ff] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 06/08/2022] [Indexed: 06/15/2023]
Abstract
We apply on-the-fly machine learning potentials (MLPs) using the sparse Gaussian process regression (SGPR) algorithm for fast optimization of atomic structures. Great acceleration is achieved even in the context of a single local optimization. Although for finding the exact local minimum, due to limited accuracy of MLPs, switching to another algorithm may be needed. For random gold clusters, the forces are reduced to ∼0.1 eV Å-1within less than ten first-principles (FP) calculations. Because of highly transferable MLPs, this algorithm is specially suitable for global optimization methods such as random or evolutionary structure searching or basin hopping. This is demonstrated by sequential optimization of random gold clusters for which, after only a few optimizations, FP calculations were rarely needed.
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Affiliation(s)
- Amir Hajibabaei
- Center for Superfunctional Materials, Department of Chemistry, Ulsan National Institute of Science and Technology, 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Muhammad Umer
- Center for Superfunctional Materials, Department of Chemistry, Ulsan National Institute of Science and Technology, 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Rohit Anand
- Center for Superfunctional Materials, Department of Chemistry, Ulsan National Institute of Science and Technology, 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Miran Ha
- Center for Superfunctional Materials, Department of Chemistry, Ulsan National Institute of Science and Technology, 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Kwang S Kim
- Center for Superfunctional Materials, Department of Chemistry, Ulsan National Institute of Science and Technology, 50 UNIST-gil, Ulsan 44919, Republic of Korea
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15
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Nemati A, Querciagrossa L, Callison C, Shadpour S, Nunes Gonçalves DP, Mori T, Cui X, Ai R, Wang J, Zannoni C, Hegmann T. Effects of shape and solute-solvent compatibility on the efficacy of chirality transfer: Nanoshapes in nematics. SCIENCE ADVANCES 2022; 8:eabl4385. [PMID: 35080976 PMCID: PMC8791610 DOI: 10.1126/sciadv.abl4385] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Chirality, as a concept, is well understood at most length scales. However, quantitative models predicting the efficacy of the transmission of chirality across length scales are lacking. We propose here a modus operandi for a chiral nanoshape solute in an achiral nematic liquid crystal host showing that that chirality transfer may be understood by unusually simple geometric considerations. This mechanism is based on the product of a pseudoscalar chirality indicator and of a geometric shape compatibility factor based on the two-dimensional isoperimetric quotients for each nanoshape solute. The model is tested on an experimental set of precisely engineered gold nanoshapes. These libraries of calculated and in-parallel acquired experimental data among related nanoshapes pave the way for predictive calculations of chirality transfer in nanoscale, macromolecular, and biological systems, from designing chiral discriminators and enantioselective catalysts to developing chiral metamaterials and understanding nature's innate ability to transfer homochirality across length scales.
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Affiliation(s)
- Ahlam Nemati
- Materials Science Graduate Program, Kent State University, Kent, OH, USA
- Advanced Materials and Liquid Crystal Institute, Kent State University, Kent, OH, USA
| | - Lara Querciagrossa
- Dipartimento di Chimica Industriale and INSTM, Università di Bologna, Bologna, Italy
| | - Corinne Callison
- Materials Science Graduate Program, Kent State University, Kent, OH, USA
- Advanced Materials and Liquid Crystal Institute, Kent State University, Kent, OH, USA
| | - Sasan Shadpour
- Materials Science Graduate Program, Kent State University, Kent, OH, USA
- Advanced Materials and Liquid Crystal Institute, Kent State University, Kent, OH, USA
| | | | - Taizo Mori
- Institute for Solid State Physics, The University of Tokyo, Tokyo, Japan
| | - Ximin Cui
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Ruoqi Ai
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Jianfang Wang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Claudio Zannoni
- Dipartimento di Chimica Industriale and INSTM, Università di Bologna, Bologna, Italy
- Corresponding author. (C.Z.); (T.H.)
| | - Torsten Hegmann
- Materials Science Graduate Program, Kent State University, Kent, OH, USA
- Advanced Materials and Liquid Crystal Institute, Kent State University, Kent, OH, USA
- Department of Chemistry and Biochemistry, Kent State University, Kent, OH, USA
- Brain Health Research Institute, Kent State University, Kent, OH, USA
- Corresponding author. (C.Z.); (T.H.)
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16
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Zhang X, Detering L, Sultan D, Heo GS, Luehmann H, Taylor S, Choksi A, Rubin JB, Liu Y. C-X-C Chemokine Receptor Type 4-Targeted Imaging in Glioblastoma Multiforme Using 64Cu-Radiolabeled Ultrasmall Gold Nanoclusters. ACS APPLIED BIO MATERIALS 2022; 5:235-242. [PMID: 35014818 DOI: 10.1021/acsabm.1c01056] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Glioblastoma multiforme (GBM) is the most prevalent and aggressive primary malignant brain cancer in adults, and it carries a poor prognosis. Despite the current multimodality treatment, including surgery, radiation, and chemotherapy, the overall survival is still poor. Neurooncological imaging plays an important role in the initial diagnosis and prediction of the treatment response of GBM. Positron emission tomography (PET) imaging using radiotracers that target disease-specific hallmarks, which are both noninvasive and specific, has drawn much attention. C-X-C chemokine receptor 4 (CXCR4) plays an important role in neoangiogenesis and vasculogenesis, and, moreover, it is reported to be overexpressed in GBM, which is associated with poor patient survival; thus, CXCR4 can be an ideal candidate for PET imaging of GBM. Nanomaterials, which possess multifunctional capabilities, effective drug delivery, and favorable pharmacokinetics, are now being applied to improve the diagnosis and therapy of the most difficult-to-treat cancers. Herein, we engineered an ultrasmall, renal-clearable gold nanoclusters intrinsically radiolabeled with 64Cu (64Cu-AuNCs-FC131) for targeted PET imaging of CXCR4 in a U87 intracranial GBM mouse model. These targeted nanoclusters demonstrated specific binding to U87 cells with minimal cytotoxicity. The in vivo biodistribution showed favorable pharmacokinetics and efficient renal clearance. PET/computed tomography imaging of the U87 model revealed the effective delivery of 64Cu-AuNCs-FC131 into the tumors. In vivo toxicity studies demonstrated insignificant safety concerns at various dosages, indicating its potential as a useful platform for GBM imaging and drug delivery.
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Affiliation(s)
- Xiaohui Zhang
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, Missouri 63110, United States
| | - Lisa Detering
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, Missouri 63110, United States
| | - Deborah Sultan
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, Missouri 63110, United States
| | - Gyu Seong Heo
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, Missouri 63110, United States
| | - Hannah Luehmann
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, Missouri 63110, United States
| | - Sara Taylor
- Department of Pediatrics, Washington University School of Medicine, St. Louis, Missouri 63110, United States.,Department of Neuroscience, Washington University School of Medicine, St. Louis, Missouri 63110, United States
| | - Ankur Choksi
- School of Medicine, University of Maryland, Baltimore, Maryland 21201, United States
| | - Joshua B Rubin
- Department of Pediatrics, Washington University School of Medicine, St. Louis, Missouri 63110, United States.,Department of Neuroscience, Washington University School of Medicine, St. Louis, Missouri 63110, United States
| | - Yongjian Liu
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, Missouri 63110, United States
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17
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Caselli L, Ridolfi A, Mangiapia G, Maltoni P, Moulin JF, Berti D, Steinke NJ, Gustafsson E, Nylander T, Montis C. Interaction of nanoparticles with lipid films: the role of symmetry and shape anisotropy. Phys Chem Chem Phys 2021; 24:2762-2776. [PMID: 34647947 DOI: 10.1039/d1cp03201a] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The bioactivity, biological fate and cytotoxicity of nanomaterials when they come into contact with living organisms are determined by their interaction with biomacromolecules and biological barriers. In this context, the role of symmetry/shape anisotropy of both the nanomaterials and biological interfaces in their mutual interaction, is a relatively unaddressed issue. Here, we study the interaction of gold nanoparticles (NPs) of different shapes (nanospheres and nanorods) with biomimetic membranes of different morphology, i.e. flat membranes (2D symmetry, representative of the most common plasma membrane geometry), and cubic membranes (3D symmetry, representative of non-lamellar membranes, found in Nature under certain biological conditions). For this purpose we used an ensemble of complementary structural techniques, including Neutron Reflectometry, Grazing Incidence Small-Angle Neutron Scattering, on a nanometer lengthscale and Confocal Laser Scanning Microscopy on a micrometer length scale. We found that the structural stability of the membrane towards NPs is dependent on the topological characteristic of the lipid assembly and of the NPs, where a higher symmetry gave higher stability. In addition, Confocal Laser Scanning Microscopy analyses highlighted that NPs interact with cubic and lamellar phases according to two distinct mechanisms, related to the different structures of the lipid assemblies. This study for the first time systematically addresses the role of NPs shape in the interaction with lipid assemblies with different symmetry. The results will contribute to improve the fundamental knowledge on lipid interfaces and will provide new insights on the biological function of phase transitions as a response strategy to the exposure of NPs.
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Affiliation(s)
- Lucrezia Caselli
- Department of Chemistry, University of Florence and CSGI, Florence, Italy.
| | - Andrea Ridolfi
- Department of Chemistry, University of Florence and CSGI, Florence, Italy. .,ISMN-CNR and CSGI, Bologna, Italy
| | - Gaetano Mangiapia
- German Engineering Materials Science Centre (GEMS) at Heinz Maier-Leibnitz Zentrum (MLZ), Helmholtz-Zentrum Hereon, Lichtenbergstr. 1, 85748 Garching bei München, Germany
| | | | - Jean-François Moulin
- German Engineering Materials Science Centre (GEMS) at Heinz Maier-Leibnitz Zentrum (MLZ), Helmholtz-Zentrum Hereon, Lichtenbergstr. 1, 85748 Garching bei München, Germany
| | - Debora Berti
- Department of Chemistry, University of Florence and CSGI, Florence, Italy.
| | | | - Emil Gustafsson
- Department of Chemistry, Uppsala University, Uppsala, Sweden
| | - Tommy Nylander
- Department of Chemistry, Physical Chemistry, Lund University, Lund, Sweden. .,NanoLund, Lund University, Lund (Sweden, Lund Institute of Advanced Neutron and X-Ray Science - LINXS), Lund, Sweden
| | - Costanza Montis
- Department of Chemistry, University of Florence and CSGI, Florence, Italy.
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18
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Extracting Turnover Frequencies of Electron Transfer in Heterogeneous Catalysis: A Study of IrO2-TiO2 Anatase for Water Oxidation Using Ce4+ Cations. Catalysts 2021. [DOI: 10.3390/catal11091030] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Within the context of electron transfer during the catalytic water oxidation reaction, the Ir-based system is among the most active. The reaction, mimicking photosynthesis II, requires the use of an electron acceptor such the Ce4+ cation. This complex reaction, involving adsorbed water at the interface of the metal cation and Ce4+, has mostly been studied in homogenous systems. To address the ambiguity regarding the gradual transformation of a homogenous system into a heterogeneous one, we prepared and studied a heterogeneous catalyst system composed of IrO2, with a mean particle size ranging from about 5 Å to 10 Å, dispersed on a TiO2 anatase support, with the objective of probing into the different parameters of the reaction, as well as the compositional changes and rates. The system was stable for many of the runs that were conducted (five consecutive runs with 0.18 M of Ce4+ showed the same reaction rate with TON > 56,000) and, equally importantly, was stable without induction periods. Extraction of the reaction rates from the set of catalysts, with an attempt to normalize them with respect to Ir loading and, therefore, to obtain turnover frequencies (TOF), was conducted. While, within reasonable deviations, the TOF numbers extracted from TPR and XPS Ir4f were close, those extracted from the particle shape (HR-STEM) were considerably larger. The difference indicates that bulk Ir atoms contribute to the electron transfer reaction, which may indicate that the reaction rate is dominated by the reorganization energy between the redox couples involved. Therefore, the normalization of reaction rates with surface atoms may lead to an overestimation of the site activity.
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19
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Khandker SS, Shakil MS, Hossen MS. Gold Nanoparticles; Potential Nanotheranostic Agent in Breast Cancer: A Comprehensive Review with Systematic Search Strategy. Curr Drug Metab 2021; 21:579-598. [PMID: 32520684 DOI: 10.2174/1389200221666200610173724] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 03/19/2020] [Accepted: 04/02/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND Breast cancer is a heterogeneous disease typically prevalent among women and is the second-largest cause of death worldwide. Early diagnosis is the key to minimize the cancer-induced complication, however, the conventional diagnostic strategies have been sluggish, complex, and, to some extent, non-specific. Therapeutic tools are not so convenient and side effects of current therapies offer the development of novel theranostic tool to combat this deadly disease. OBJECTIVE This article aims to summarize the advances in the diagnosis and treatment of breast cancer with gold nanoparticles (GNP or AuNP). METHODS A systematic search was conducted in the three popular electronic online databases including PubMed, Google Scholar, and Web of Science, regarding GNP as breast cancer theranostics. RESULTS Published literature demonstrated that GNPs tuned with photosensitive moieties, nanomaterials, drugs, peptides, nucleotide, peptides, antibodies, aptamer, and other biomolecules improve the conventional diagnostic and therapeutic strategies of breast cancer management with minimum cytotoxic effect. GNP derived diagnosis system assures reproducibility, reliability, and accuracy cost-effectively. Additionally, surface-modified GNP displayed theranostic potential even in the metastatic stage of breast cancer. CONCLUSION Divergent strategies have shown the theranostic potential of surface tuned GNPs against breast cancer even in the metastatic stage with minimum cytotoxic effects both in vitro and in vivo.
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Affiliation(s)
- Shahad Saif Khandker
- Department of Biochemistry and Molecular Biology, Jahangirnagar University, Savar, Dhaka, Bangladesh
| | - Md Salman Shakil
- Department of Pharmacology & Toxicology, University of Otago, 362 Leith St., North Dunedin, Dunedin 9016, New Zealand
| | - Md Sakib Hossen
- Department of Biochemistry, Primeasia University, Banani, Dhaka, Bangladesh
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20
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Fages T, Jolibois F, Poteau R. Recognition of the three-dimensional structure of small metal nanoparticles by a supervised artificial neural network. Theor Chem Acc 2021. [DOI: 10.1007/s00214-021-02795-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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21
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Loof D, Thüringer O, Schowalter M, Mahr C, Pranti AS, Lang W, Rosenauer A, Zielasek V, Kunz S, Bäumer M. Synthesis and Characterization of Ligand-Linked Pt Nanoparticles: Tunable, Three-Dimensional, Porous Networks for Catalytic Hydrogen Sensing. ChemistryOpen 2021; 10:697-712. [PMID: 34251087 PMCID: PMC8274309 DOI: 10.1002/open.202000344] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 06/03/2021] [Indexed: 11/25/2022] Open
Abstract
Porous networks of Pt nanoparticles interlinked by bifunctional organic ligands have shown high potential as catalysts in micro-machined hydrogen gas sensors. By varying the ligand among p-phenylenediamine, benzidine, 4,4''-diamino-p-terphenyl, 1,5-diaminonaphthalene, and trans-1,4-diaminocyclohexane, new variants of such networks were synthesized. Inter-particle distances within the networks, determined via transmission electron microscopy tomography, varied from 0.8 to 1.4 nm in accordance with the nominal length of the respective ligand. While stable structures with intact and coordinatively bonded diamines were formed with all ligands, aromatic diamines showed superior thermal stability. The networks exhibited mesoporous structures depending on ligand and synthesis strategy and performed well as catalysts in hydrogen gas microsensors. They demonstrate the possibility of deliberately tuning micro- and mesoporosity and thereby transport properties and steric demands by choice of the right ligand also for other applications in heterogeneous catalysis.
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Affiliation(s)
- Daniel Loof
- Institute of Applied and Physical ChemistryUniversity of BremenLeobener Str. 628359BremenGermany
| | - Oliver Thüringer
- Institute of Applied and Physical ChemistryUniversity of BremenLeobener Str. 628359BremenGermany
| | - Marco Schowalter
- Institute of Solid-State PhysicsUniversity of BremenOtto-Hahn-Allee 128359BremenGermany
| | - Christoph Mahr
- Institute of Solid-State PhysicsUniversity of BremenOtto-Hahn-Allee 128359BremenGermany
| | - Anmona Shabnam Pranti
- Institute for Microsensors, -actuators and -systems (IMSAS)University of BremenOtto-Hahn-Allee 128359BremenGermany
| | - Walter Lang
- Institute for Microsensors, -actuators and -systems (IMSAS)University of BremenOtto-Hahn-Allee 128359BremenGermany
| | - Andreas Rosenauer
- Institute of Solid-State PhysicsUniversity of BremenOtto-Hahn-Allee 128359BremenGermany
| | - Volkmar Zielasek
- Institute of Applied and Physical ChemistryUniversity of BremenLeobener Str. 628359BremenGermany
| | - Sebastian Kunz
- Institute of Applied and Physical ChemistryUniversity of BremenLeobener Str. 628359BremenGermany
- Südzucker AGCentral Department Research, Development, and Services (CRDS)Wormser Strasse 1167283ObrigheimGermany
| | - Marcus Bäumer
- Institute of Applied and Physical ChemistryUniversity of BremenLeobener Str. 628359BremenGermany
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22
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Jin B, Wang Y, Jin C, De Yoreo JJ, Tang R. Revealing Au 13 as Elementary Clusters During the Early Formation of Au Nanocrystals. J Phys Chem Lett 2021; 12:5938-5943. [PMID: 34156865 DOI: 10.1021/acs.jpclett.1c01647] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Understanding the formation mechanism of nanocrystals in solution is fundamental to the development of materials science. For a metal nanocrystal, the cluster-mediated formation mechanism is still poorly understood. In particular, identifying what types of clusters are dominant and how they evolve into a nanocrystal in the early nucleation stage remains a great challenge. Here, using liquid-cell transmission electron microscopy, we directly observe the formation of ultrasmall Au clusters (∼0.84 nm) in the presence of PAA-Na. These clusters, which correspond to the size of the Au13 cluster, coalesce to form nanocrystals. Our molecular dynamics simulations suggest that Au13 in an aqueous environment has greater stability when compared to other cluster sizes and provide atomistic details of growth by cluster coalescence. Collectively, our demonstration of Au13 as the dominant species with an elaboration of their coalescence kinetics sheds light on nonclassical nanocrystal formation mechanisms and offers useful guidelines for designing innovative pathways for the synthesis of nanomaterials.
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Affiliation(s)
- Biao Jin
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Yanming Wang
- University of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai 200240, China
| | | | - James J De Yoreo
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195, United States
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23
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Sun J, Du Z, Liu Y, Ai W, Wang K, Wang T, Du H, Liu L, Huang W. State-Of-The-Art and Future Challenges in High Energy Lithium-Selenium Batteries. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2003845. [PMID: 33491836 DOI: 10.1002/adma.202003845] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 09/22/2020] [Indexed: 06/12/2023]
Abstract
Li-chalcogen batteries, especially the Li-S batteries (LSBs), have received paramount interests as next generation energy storage techniques because of their high theoretical energy densities. However, the associated challenges need to be overcome prior to their commercialization. Elemental selenium, another chalcogen member, would be an attractive alternative to sulfur owing to its higher electronic conductivity, comparable capacity density, and moreover, excellent compatibility with carbonate electrolytes. Unlike LSBs, the research and development of Li-Se batteries (LSeBs) have garnered burgeoning attention but are still in their infant stage, where a comprehensive yet in-depth overview is highly imperative to guide future research. Herein, a critical review of LSeBs, in terms of the underlying mechanisms, cathode design, blocking layer engineering, and emerging solid-state electrolytes is provided. First, the electrolyte-dependent electrochemistry of LSeBs is discussed. Second, the advances in Se-based cathodes are comprehensively summarized, especially highlighting the state-of-the-art Sex Sy cathodes, and mainly focusing on their structures, compositions, and synthetic strategies. Third, the versatile separators/interlayers optimization and interface regulation are outlined, with a particular focus on the emerging solid-state electrolytes for advanced LSeBs. Last, the remaining challenges and research orientations in this booming field are proposed, which are expected to motivate more insightful works.
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Affiliation(s)
- Jinmeng Sun
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, China
| | - Zhuzhu Du
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, China
| | - Yuhang Liu
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, China
| | - Wei Ai
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, China
| | - Ke Wang
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, China
| | - Tian Wang
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, China
| | - Hongfang Du
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, China
| | - Lei Liu
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, China
| | - Wei Huang
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, China
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China
- Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), SICAM, Nanjing University of Posts & Telecommunications, Nanjing, 210023, China
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van der Meer SB, Seiler T, Buchmann C, Partalidou G, Boden S, Loza K, Heggen M, Linders J, Prymak O, Oliveira CLP, Hartmann L, Epple M. Controlling the Surface Functionalization of Ultrasmall Gold Nanoparticles by Sequence-Defined Macromolecules. Chemistry 2021; 27:1451-1464. [PMID: 32959929 PMCID: PMC7898849 DOI: 10.1002/chem.202003804] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 09/15/2020] [Indexed: 02/06/2023]
Abstract
Ultrasmall gold nanoparticles (diameter about 2 nm) were surface-functionalized with cysteine-carrying precision macromolecules. These consisted of sequence-defined oligo(amidoamine)s (OAAs) with either two or six cysteine molecules for binding to the gold surface and either with or without a PEG chain (3400 Da). They were characterized by 1 H NMR spectroscopy, 1 H NMR diffusion-ordered spectroscopy (DOSY), small-angle X-ray scattering (SAXS), and high-resolution transmission electron microscopy. The number of precision macromolecules per nanoparticle was determined after fluorescent labeling by UV spectroscopy and also by quantitative 1 H NMR spectroscopy. Each nanoparticle carried between 40 and 100 OAA ligands, depending on the number of cysteine units per OAA. The footprint of each ligand was about 0.074 nm2 per cysteine molecule. OAAs are well suited to stabilize ultrasmall gold nanoparticles by selective surface conjugation and can be used to selectively cover their surface. The presence of the PEG chain considerably increased the hydrodynamic diameter of both dissolved macromolecules and macromolecule-conjugated gold nanoparticles.
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Affiliation(s)
- Selina Beatrice van der Meer
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)University of Duisburg-EssenUniversitätsstr. 5–745117EssenGermany
| | - Theresa Seiler
- Organic Chemistry and Macromolecular ChemistryHeinrich Heine-University DüsseldorfUniversitätsstr. 140225DüsseldorfGermany
| | - Christin Buchmann
- Organic Chemistry and Macromolecular ChemistryHeinrich Heine-University DüsseldorfUniversitätsstr. 140225DüsseldorfGermany
| | - Georgia Partalidou
- Organic Chemistry and Macromolecular ChemistryHeinrich Heine-University DüsseldorfUniversitätsstr. 140225DüsseldorfGermany
| | - Sophia Boden
- Organic Chemistry and Macromolecular ChemistryHeinrich Heine-University DüsseldorfUniversitätsstr. 140225DüsseldorfGermany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)University of Duisburg-EssenUniversitätsstr. 5–745117EssenGermany
| | - Marc Heggen
- Ernst Ruska-Center for Microscopy and Spectroscopy with ElectronsForschungszentrum Jülich GmbH52425JülichGermany
| | - Jürgen Linders
- Physical Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)University of Duisburg-EssenUniversitätsstr. 5–745117EssenGermany
| | - Oleg Prymak
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)University of Duisburg-EssenUniversitätsstr. 5–745117EssenGermany
| | | | - Laura Hartmann
- Organic Chemistry and Macromolecular ChemistryHeinrich Heine-University DüsseldorfUniversitätsstr. 140225DüsseldorfGermany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)University of Duisburg-EssenUniversitätsstr. 5–745117EssenGermany
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25
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Lynch I, Afantitis A, Exner T, Himly M, Lobaskin V, Doganis P, Maier D, Sanabria N, Papadiamantis AG, Rybinska-Fryca A, Gromelski M, Puzyn T, Willighagen E, Johnston BD, Gulumian M, Matzke M, Green Etxabe A, Bossa N, Serra A, Liampa I, Harper S, Tämm K, Jensen ACØ, Kohonen P, Slater L, Tsoumanis A, Greco D, Winkler DA, Sarimveis H, Melagraki G. Can an InChI for Nano Address the Need for a Simplified Representation of Complex Nanomaterials across Experimental and Nanoinformatics Studies? NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E2493. [PMID: 33322568 PMCID: PMC7764592 DOI: 10.3390/nano10122493] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 12/05/2020] [Accepted: 12/08/2020] [Indexed: 12/16/2022]
Abstract
Chemoinformatics has developed efficient ways of representing chemical structures for small molecules as simple text strings, simplified molecular-input line-entry system (SMILES) and the IUPAC International Chemical Identifier (InChI), which are machine-readable. In particular, InChIs have been extended to encode formalized representations of mixtures and reactions, and work is ongoing to represent polymers and other macromolecules in this way. The next frontier is encoding the multi-component structures of nanomaterials (NMs) in a machine-readable format to enable linking of datasets for nanoinformatics and regulatory applications. A workshop organized by the H2020 research infrastructure NanoCommons and the nanoinformatics project NanoSolveIT analyzed issues involved in developing an InChI for NMs (NInChI). The layers needed to capture NM structures include but are not limited to: core composition (possibly multi-layered); surface topography; surface coatings or functionalization; doping with other chemicals; and representation of impurities. NM distributions (size, shape, composition, surface properties, etc.), types of chemical linkages connecting surface functionalization and coating molecules to the core, and various crystallographic forms exhibited by NMs also need to be considered. Six case studies were conducted to elucidate requirements for unambiguous description of NMs. The suggested NInChI layers are intended to stimulate further analysis that will lead to the first version of a "nano" extension to the InChI standard.
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Affiliation(s)
- Iseult Lynch
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK;
| | - Antreas Afantitis
- Nanoinformatics Department, NovaMechanics Ltd., 1666 Nicosia, Cyprus; (A.A.); (A.T.)
| | - Thomas Exner
- Edelweiss Connect GmbH, Hochbergerstrasse 60C, 4057 Basel, Switzerland;
| | - Martin Himly
- Department Biosciences, Paris Lodron University of Salzburg, Hellbrunnerstrasse 34, 5020 Salzburg, Austria;
| | - Vladimir Lobaskin
- School of Physics, University College Dublin, Belfield, Dublin 4, Ireland;
| | - Philip Doganis
- School of Chemical Engineering, National Technical University of Athens, 157 80 Athens, Greece; (P.D.); (I.L.); (H.S.)
| | - Dieter Maier
- Biomax Informatics AG, Robert-Koch-Str. 2, 82152 Planegg, Germany;
| | - Natasha Sanabria
- National Health Laboratory Services, 1 Modderfontein Rd, Sandringham, Johannesburg 2192, South Africa; (N.S.); (M.G.)
| | - Anastasios G. Papadiamantis
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK;
- Nanoinformatics Department, NovaMechanics Ltd., 1666 Nicosia, Cyprus; (A.A.); (A.T.)
| | - Anna Rybinska-Fryca
- QSAR Lab Ltd., Aleja Grunwaldzka 190/102, 80-266 Gdansk, Poland; (A.R.-F.); (M.G.); (T.P.)
| | - Maciej Gromelski
- QSAR Lab Ltd., Aleja Grunwaldzka 190/102, 80-266 Gdansk, Poland; (A.R.-F.); (M.G.); (T.P.)
| | - Tomasz Puzyn
- QSAR Lab Ltd., Aleja Grunwaldzka 190/102, 80-266 Gdansk, Poland; (A.R.-F.); (M.G.); (T.P.)
| | - Egon Willighagen
- Department of Bioinformatics—BiGCaT, School of Nutrition and Translational Research in Metabolism, Maastricht University, Universiteitssingel 50, 6229 ER Maastricht, The Netherlands;
| | - Blair D. Johnston
- Department Chemicals and Product Safety, Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, 10589 Berlin, Germany;
| | - Mary Gulumian
- National Health Laboratory Services, 1 Modderfontein Rd, Sandringham, Johannesburg 2192, South Africa; (N.S.); (M.G.)
- Haematology and Molecular Medicine, University of the Witwatersrand, 1 Jan Smuts Ave, Johannesburg 2000, South Africa
| | - Marianne Matzke
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford OX10 8BB, UK; (M.M.); (A.G.E.)
| | - Amaia Green Etxabe
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford OX10 8BB, UK; (M.M.); (A.G.E.)
| | - Nathan Bossa
- LEITAT Technological Center, Circular Economy Business Unit, C/de La Innovació 2, 08225 Terrassa, Barcelona, Spain;
| | - Angela Serra
- Faculty of Medicine and Health Technology, Tampere University, FI-33014 Tampere, Finland; (A.S.); (D.G.)
| | - Irene Liampa
- School of Chemical Engineering, National Technical University of Athens, 157 80 Athens, Greece; (P.D.); (I.L.); (H.S.)
| | - Stacey Harper
- School of Chemical, Biological, and Environmental Engineering, Oregon State University, 116 Johnson Hall 105 SW 26th St., Corvallis, OR 97331, USA;
| | - Kaido Tämm
- Institute of Chemistry, University of Tartu, Ülikooli 18, 50090 Tartu, Estonia;
| | - Alexander CØ Jensen
- The National Research Center for the Work Environment, Lersø Parkallé 105, 2100 Copenhagen, Denmark;
| | - Pekka Kohonen
- Misvik Biology OY, Karjakatu 35 B, 20520 Turku, Finland;
| | - Luke Slater
- Institute of Cancer and Genomics, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK;
| | - Andreas Tsoumanis
- Nanoinformatics Department, NovaMechanics Ltd., 1666 Nicosia, Cyprus; (A.A.); (A.T.)
| | - Dario Greco
- Faculty of Medicine and Health Technology, Tampere University, FI-33014 Tampere, Finland; (A.S.); (D.G.)
| | - David A. Winkler
- Institute of Molecular Sciences, La Trobe University, Kingsbury Drive, Bundoora 3086, Australia;
- Monash Institute of Pharmaceutical Sciences, Monash University, Parkville 3052, Australia
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK
- CSIRO Data61, Pullenvale 4069, Australia
| | - Haralambos Sarimveis
- School of Chemical Engineering, National Technical University of Athens, 157 80 Athens, Greece; (P.D.); (I.L.); (H.S.)
| | - Georgia Melagraki
- Nanoinformatics Department, NovaMechanics Ltd., 1666 Nicosia, Cyprus; (A.A.); (A.T.)
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26
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Sepúlveda M, Castaño J, Echeverría F, Aoki Y, Kowalski D, Habazaki H. Formation of quasi-spherical Au48-198 clusters in anodic titania nanotubes grown on Ti-Au alloys. Electrochem commun 2020. [DOI: 10.1016/j.elecom.2020.106847] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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27
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Yoshii T, Umemoto D, Yamamoto M, Kuwahara Y, Nishihara H, Mori K, Kyotani T, Yamashita H. Pyrene‐Thiol‐modified Pd Nanoparticles on Carbon Support: Kinetic Control by Steric Hinderance and Improved Stability by the Catalyst‐Support Interaction. ChemCatChem 2020. [DOI: 10.1002/cctc.202000987] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Takeharu Yoshii
- Division of Materials and Manufacturing Science Graduate School of Engineering Osaka University 2-1 Yamada-oka Suita Osaka 565-0871 Japan
| | - Daiki Umemoto
- Division of Materials and Manufacturing Science Graduate School of Engineering Osaka University 2-1 Yamada-oka Suita Osaka 565-0871 Japan
| | - Masanori Yamamoto
- Institute of Multidisciplinary Research for Advanced Materials Tohoku University 2-1-1 Katahira, Aoba-ku Sendai Miyagi 980-8577 Japan
| | - Yasutaka Kuwahara
- Division of Materials and Manufacturing Science Graduate School of Engineering Osaka University 2-1 Yamada-oka Suita Osaka 565-0871 Japan
- Elements Strategy Initiative for Catalysts Batteries (ESICB) Kyoto University Katsura Kyoto 615-8520 Japan
- JST PRESTO 4-1-8 Honcho Kawaguchi Saitama 332-0012 Japan
| | - Hirotomo Nishihara
- Institute of Multidisciplinary Research for Advanced Materials Tohoku University 2-1-1 Katahira, Aoba-ku Sendai Miyagi 980-8577 Japan
| | - Kohsuke Mori
- Division of Materials and Manufacturing Science Graduate School of Engineering Osaka University 2-1 Yamada-oka Suita Osaka 565-0871 Japan
- Elements Strategy Initiative for Catalysts Batteries (ESICB) Kyoto University Katsura Kyoto 615-8520 Japan
| | - Takashi Kyotani
- Institute of Multidisciplinary Research for Advanced Materials Tohoku University 2-1-1 Katahira, Aoba-ku Sendai Miyagi 980-8577 Japan
| | - Hiromi Yamashita
- Division of Materials and Manufacturing Science Graduate School of Engineering Osaka University 2-1 Yamada-oka Suita Osaka 565-0871 Japan
- Elements Strategy Initiative for Catalysts Batteries (ESICB) Kyoto University Katsura Kyoto 615-8520 Japan
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28
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Cao Z, Chen J, Tran J, Chen X, Bacacao B, Bekale LA, Santa Maria PL. Antimicrobial Gold Nanoclusters Eradicate Escherichia coli Biofilms and Are Nontoxic by Oral Administration. ACS APPLIED BIO MATERIALS 2020; 3:5275-5286. [PMID: 35021702 DOI: 10.1021/acsabm.0c00641] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Zhixin Cao
- Department of Otolaryngology, Head and Neck Surgery, Stanford University, 801 Welch Road, Stanford, California 94305-5739, United States
- Department of Pathology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong 250021, China
| | - Jing Chen
- Department of Otolaryngology, Head and Neck Surgery, Stanford University, 801 Welch Road, Stanford, California 94305-5739, United States
| | - Jessica Tran
- The Protein and Nucleic Acid Biotechnology Facility, Beckman Center Stanford University, 279 Campus Drive West, Stanford, California 94305, United States
| | - Xiaohua Chen
- Department of Otolaryngology, Head and Neck Surgery, Stanford University, 801 Welch Road, Stanford, California 94305-5739, United States
- Department of Otolaryngology Head and Neck Surgery, the First Affiliated Hospital, Zhengzhou University, Zhengzhou 450000, China
| | - Brian Bacacao
- Department of Otolaryngology, Head and Neck Surgery, Stanford University, 801 Welch Road, Stanford, California 94305-5739, United States
| | - Laurent A. Bekale
- Department of Otolaryngology, Head and Neck Surgery, Stanford University, 801 Welch Road, Stanford, California 94305-5739, United States
| | - Peter L. Santa Maria
- Department of Otolaryngology, Head and Neck Surgery, Stanford University, 801 Welch Road, Stanford, California 94305-5739, United States
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29
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Remediation of azo-dyes based toxicity by agro-waste cotton boll peels mediated palladium nanoparticles. JOURNAL OF SAUDI CHEMICAL SOCIETY 2020. [DOI: 10.1016/j.jscs.2019.11.003] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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30
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Clément M, Abdellah I, Ray P, Martini C, Coppel Y, Remita H, Lampre I, Huc V. Synthesis and NMR study of trimethylphosphine gold(i)-appended calix[8]arenes as precursors of gold nanoparticles. Inorg Chem Front 2020. [DOI: 10.1039/c9qi01475f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this paper, the synthesis of gold(i)-calix[8]arene complexes from benzyloxycalix[8]arene is reported as well as their radiolytic reduction leading to gold nanoparticles.
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Affiliation(s)
- Marie Clément
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- Univ Paris-Sud UMR 8182 CNRS
- Université Paris-Saclay
- 91405 Orsay cedex
- France
| | - Ibrahim Abdellah
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- Univ Paris-Sud UMR 8182 CNRS
- Université Paris-Saclay
- 91405 Orsay cedex
- France
| | - Priyanka Ray
- Laboratoire de Chimie Physique
- Univ Paris-Sud UMR 8000 CNRS
- Université Paris-Saclay
- 91405 Orsay cedex
- France
| | - Cyril Martini
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- Univ Paris-Sud UMR 8182 CNRS
- Université Paris-Saclay
- 91405 Orsay cedex
- France
| | - Yannick Coppel
- Laboratoire de Chimie de Coordination
- UPR 8241 CNRS
- Université de Toulouse
- 31077 Toulouse Cedex 4
- France
| | - Hynd Remita
- Laboratoire de Chimie Physique
- Univ Paris-Sud UMR 8000 CNRS
- Université Paris-Saclay
- 91405 Orsay cedex
- France
| | - Isabelle Lampre
- Laboratoire de Chimie Physique
- Univ Paris-Sud UMR 8000 CNRS
- Université Paris-Saclay
- 91405 Orsay cedex
- France
| | - Vincent Huc
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- Univ Paris-Sud UMR 8182 CNRS
- Université Paris-Saclay
- 91405 Orsay cedex
- France
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31
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Myco-engineered gold nanoparticles from Jahnula aquatica coated with ampicillin/amoxicillin and their antibacterial and anticancer activity against cancer cells. Biotechnol Lett 2019; 42:151-170. [DOI: 10.1007/s10529-019-02764-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 11/11/2019] [Indexed: 10/25/2022]
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32
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Yoshii T, Umemoto D, Kuwahara Y, Mori K, Yamashita H. Engineering of Surface Environment of Pd Nanoparticle Catalysts on Carbon Support with Pyrene-Thiol Ligands for Semihydrogenation of Alkynes. ACS APPLIED MATERIALS & INTERFACES 2019; 11:37708-37719. [PMID: 31538475 DOI: 10.1021/acsami.9b12470] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A new type of pyrene-thiol derivative-modified Pd nanoparticle (NP) catalyst on a carbon black support for the efficient semihydrogenation of alkynes to alkenes is reported herein. Colloidal Pd NPs surrounded by pyrene-thiol modifiers were prepared using the two-phase Brust method followed by impregnation of carbon black materials. Based on the structural characterization of the prepared catalyst (PyC12S-Pd/VC) by NMR, UV-vis, FT-IR, TEM, HAADF-STEM, Pd K-edge XAFS, XRD, N2 adsorption, and XPS, we show that highly dispersed Pd NPs are immobilized on the catalysts via π-π interaction between pyrene groups bound to the Pd NPs and carbon black supports. PyC12S-Pd/VC efficiently catalyzes the alkyne semihydrogenation reaction while maintaining high alkene selectivity; an alkene selectivity of 94% is attained at 98% conversion after 5 h of reaction, and the selectivity was retained around 80% in 10 h of reaction. This performance is superior to that of a catalyst without pyrene groups and that of a commercial Lindlar catalyst. The steric hindrance of pyrene groups restricts access of the substrates to Pd NP surfaces, suppressing the unfavorable overhydrogenation of alkenes to alkanes, which is revealed by the solvent and substrate dependency on the catalytic performance and a DFT calculation study. Furthermore, the high selectivity and stability of PyC12S-Pd/VC are caused by the strong interaction between pyrene groups and carbon supports, which prevents the separation of pyrene modifiers and the leaching or sintering of Pd NPs during the catalytic reaction. It is demonstrated that the combination of Pd NPs, pyrene-thiol modifiers, and carbon supports offers high activity, alkene selectivity, and stability in the semihydrogenation reaction.
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Affiliation(s)
- Takeharu Yoshii
- Division of Materials and Manufacturing Science, Graduate School of Engineering , Osaka University , 2-1 Yamadaoka , Suita, Osaka 565-0871 , Japan
| | - Daiki Umemoto
- Division of Materials and Manufacturing Science, Graduate School of Engineering , Osaka University , 2-1 Yamadaoka , Suita, Osaka 565-0871 , Japan
| | - Yasutaka Kuwahara
- Division of Materials and Manufacturing Science, Graduate School of Engineering , Osaka University , 2-1 Yamadaoka , Suita, Osaka 565-0871 , Japan
- Elements Strategy Initiative for Catalysts & Batteries Kyoto University (ESICB) , Kyoto University , Katsura, Kyoto 615-8520 , Japan
| | - Kohsuke Mori
- Division of Materials and Manufacturing Science, Graduate School of Engineering , Osaka University , 2-1 Yamadaoka , Suita, Osaka 565-0871 , Japan
- Elements Strategy Initiative for Catalysts & Batteries Kyoto University (ESICB) , Kyoto University , Katsura, Kyoto 615-8520 , Japan
| | - Hiromi Yamashita
- Division of Materials and Manufacturing Science, Graduate School of Engineering , Osaka University , 2-1 Yamadaoka , Suita, Osaka 565-0871 , Japan
- Elements Strategy Initiative for Catalysts & Batteries Kyoto University (ESICB) , Kyoto University , Katsura, Kyoto 615-8520 , Japan
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33
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Darweesh RS, Ayoub NM, Nazzal S. Gold nanoparticles and angiogenesis: molecular mechanisms and biomedical applications. Int J Nanomedicine 2019; 14:7643-7663. [PMID: 31571869 PMCID: PMC6756918 DOI: 10.2147/ijn.s223941] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Accepted: 08/18/2019] [Indexed: 12/12/2022] Open
Abstract
Angiogenesis is the formation of new blood vessels from pre-existing vessels. It is a highly regulated process as determined by the interplay between pro-angiogenic and anti-angiogenic factors. Under certain conditions the balance between angiogenesis stimulators and inhibitors is altered, which results in a shift from physiological to pathological angiogenesis. Therefore, the goal of therapeutic targeting of angiogenic process is to normalize vasculature in target tissues by enhancing angiogenesis in disease conditions of reduced vascularity and blood flow, such as tissue ischemia, or alternatively to inhibit excessive and abnormal angiogenesis in disorders like cancer. Gold nanoparticles (AuNPs) are special particles that are generated by nanotechnology and composed of an inorganic core containing gold which is encircled by an organic monolayer. The ability of AuNPs to alter vasculature has captured recent attention in medical literature as potential therapeutic agents for the management of pathologic angiogenesis. This review provides an overview of the effects of AuNPs on angiogenesis and the molecular mechanisms and biomedical applications associated with their effects. In addition, the main synthesis methods, physical properties, uptake mechanisms, and toxicity of AuNPs are briefly summarized.
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Affiliation(s)
- Ruba S Darweesh
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid22110, Jordan
| | - Nehad M Ayoub
- Department of Clinical Pharmacy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid22110, Jordan
| | - Sami Nazzal
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center, Dallas, TX75235-6411, USA
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34
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Algar WR, Jeen T, Massey M, Peveler WJ, Asselin J. Small Surface, Big Effects, and Big Challenges: Toward Understanding Enzymatic Activity at the Inorganic Nanoparticle-Substrate Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:7067-7091. [PMID: 30415548 DOI: 10.1021/acs.langmuir.8b02733] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Enzymes are important biomarkers for molecular diagnostics and targets for the action of drugs. In turn, inorganic nanoparticles (NPs) are of interest as materials for biological assays, biosensors, cellular and in vivo imaging probes, and vectors for drug delivery and theranostics. So how does an enzyme interact with a NP, and what are the outcomes of multivalent conjugation of its substrate to a NP? This invited feature article addresses the current state of the art in answering this question. Using gold nanoparticles (Au NPs) and semiconductor quantum dots (QDs) as illustrative materials, we discuss aspects of enzyme structure-function and the properties of NP interfaces and surface chemistry that determine enzyme-NP interactions. These aspects render the substrate-on-NP configurations far more complex and heterogeneous than the conventional turnover of discrete substrate molecules in bulk solution. Special attention is also given to the limitations of a standard kinetic analysis of the enzymatic turnover of these configurations, the need for a well-defined model of turnover, and whether a "hopping" model can account for behaviors such as the apparent acceleration of enzyme activity. A detailed and predictive understanding of how enzymes turn over multivalent NP-substrate conjugates will require a convergence of many concepts and tools from biochemistry, materials, and interface science. In turn, this understanding will help to enable rational, optimized, and value-added designs of NP bioconjugates for biomedical and clinical applications.
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Affiliation(s)
- W Russ Algar
- Department of Chemistry , University of British Columbia , 2036 Main Mall , Vancouver , British Columbia V6T 1Z1 , Canada
| | - Tiffany Jeen
- Department of Chemistry , University of British Columbia , 2036 Main Mall , Vancouver , British Columbia V6T 1Z1 , Canada
| | - Melissa Massey
- Department of Chemistry , University of British Columbia , 2036 Main Mall , Vancouver , British Columbia V6T 1Z1 , Canada
| | - William J Peveler
- Department of Chemistry , University of British Columbia , 2036 Main Mall , Vancouver , British Columbia V6T 1Z1 , Canada
- Division of Biomedical Engineering, School of Engineering , University of Glasgow , Glasgow G12 8LT , United Kingdom
| | - Jérémie Asselin
- Department of Chemistry , University of British Columbia , 2036 Main Mall , Vancouver , British Columbia V6T 1Z1 , Canada
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35
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Nanoporous gold chemically de-alloyed from Au-based amorphous thin film for electrochemical nonenzymatic H2O2 sensing. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.03.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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36
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Martínez Á, Lyu Y, Mancin F, Scrimin P. Glucosamine Phosphate Induces AuNPs Aggregation and Fusion into Easily Functionalizable Nanowires. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E622. [PMID: 30999571 PMCID: PMC6523341 DOI: 10.3390/nano9040622] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 04/07/2019] [Accepted: 04/10/2019] [Indexed: 12/18/2022]
Abstract
The challenge to obtain plasmonic nanosystems absorbing light in the near infrared is always open because of the interest that such systems pose in applications such as nanotherapy or nanodiagnostics. Here we describe the synthesis in an aqueous solution devoid of any surfactant of Au-nanowires of controlled length and reasonably narrow dimensional distribution starting from Au-nanoparticles by taking advantage of the properties of glucosamine phosphate under aerobic conditions and substoichiometric nanoparticle passivation. Oxygen is required to enable the process where glucosamine phosphate is oxidized to glucosaminic acid phosphate and H2O2 is produced. The process leading to the nanosystems comprises nanoparticles growth, their aggregation into necklace-like aggregates, and final fusion into nanowires. The fusion requires the consumption of H2O2. The nanowires can be passivated with an organic thiol, lyophilized, and resuspended in water without losing their dimensional and optical properties. The position of the broad surface plasmon band of the nanowires can be tuned from 630 to >1350 nm.
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Affiliation(s)
- Álvaro Martínez
- Department of Chemical Sciences, University of Padova, via Marzolo, 1, 35131 Padova, Italy.
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 Donostia, Spain.
| | - Yanchao Lyu
- Department of Chemical Sciences, University of Padova, via Marzolo, 1, 35131 Padova, Italy.
| | - Fabrizio Mancin
- Department of Chemical Sciences, University of Padova, via Marzolo, 1, 35131 Padova, Italy.
| | - Paolo Scrimin
- Department of Chemical Sciences, University of Padova, via Marzolo, 1, 35131 Padova, Italy.
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Shadpour S, Vanegas JP, Nemati A, Hegmann T. Amplification of Chirality by Adenosine Monophosphate-Capped Luminescent Gold Nanoclusters in Nematic Lyotropic Chromonic Liquid Crystal Tactoids. ACS OMEGA 2019; 4:1662-1668. [PMID: 31459422 PMCID: PMC6648145 DOI: 10.1021/acsomega.8b03335] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 01/08/2019] [Indexed: 06/01/2023]
Abstract
Amplification of chirality across length scales is a key concept pertinent to many models aiming to unravel the origin of homochirality. Tactoids of lyotropic chromonic liquid crystals formed by DNA, dyes, and other flat ionic molecules in water in the biphasic nematic + isotropic regime turn out to be a particularly relevant system to investigate chirality transfer and amplification. Herein, we present experiments to determine the amplification of chirality by luminescent gold nanoclusters decorated with adenosine monophosphate inducing chiral nematic tactoids formed by disodium cromoglycate in water. Polarized optical microscopy investigations of the induced homochiral tactoids reveal that adenosine monophosphate shows a higher optical activity when bound to the surface of such gold nanoclusters in comparison to free adenosine monophosphate, despite a three-time lower overall concentration. Free adenosine monophosphate also induces the opposite chiral twist both in the bulk nematic phase as shown by induced thin film circular dichroism spectropolarimetry and in the tactoids in comparison to adenosine monophosphate bound to the gold nanocluster. Overall, these experiments demonstrate that lyotropic chromonic liquid crystal tactoids are powerful systems to image and quantify chirality amplification by key biological chiral molecules that would have played a role in the origin of homochirality.
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Affiliation(s)
- Sasan Shadpour
- Chemical
Physics Interdisciplinary Program, Advanced Materials and
Liquid Crystal Institute and Department of Chemistry and Biochemistry, Kent State University, Kent, Ohio 44242-0001, United States
| | - Julie P. Vanegas
- Chemical
Physics Interdisciplinary Program, Advanced Materials and
Liquid Crystal Institute and Department of Chemistry and Biochemistry, Kent State University, Kent, Ohio 44242-0001, United States
| | - Ahlam Nemati
- Chemical
Physics Interdisciplinary Program, Advanced Materials and
Liquid Crystal Institute and Department of Chemistry and Biochemistry, Kent State University, Kent, Ohio 44242-0001, United States
| | - Torsten Hegmann
- Chemical
Physics Interdisciplinary Program, Advanced Materials and
Liquid Crystal Institute and Department of Chemistry and Biochemistry, Kent State University, Kent, Ohio 44242-0001, United States
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38
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Adhikari L, Larm NE, Wagle DV, Atwood JL, Baker GA. Facile, one-pot, in aqua synthesis of catalytically competent gold nanoparticles using pyrogallol[4]arene as the sole reagent. Chem Commun (Camb) 2019; 55:6261-6264. [DOI: 10.1039/c9cc01698h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Rapid and facile synthesis of macrocycle-capped gold nanoparticles employing pyrogallol[4]arenes as a dual-role reducing and stabilizing agent.
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Affiliation(s)
- Laxmi Adhikari
- Department of Chemistry
- University of Missouri
- Columbia
- USA
| | | | | | | | - Gary A. Baker
- Department of Chemistry
- University of Missouri
- Columbia
- USA
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39
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Chu Z, Han Y, Bian T, De S, Král P, Klajn R. Supramolecular Control of Azobenzene Switching on Nanoparticles. J Am Chem Soc 2018; 141:1949-1960. [DOI: 10.1021/jacs.8b09638] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Zonglin Chu
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Yanxiao Han
- Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Tong Bian
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Soumen De
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Petr Král
- Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 60607, United States
- Department of Physics and Department of Biopharmaceutical Sciences, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Rafal Klajn
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
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40
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Karpushkin EA, Aleksandrov YD, Gibalova AV, Abakumov AM, Lopatina LI, Sergeyev VG. Preparation of gold nanoparticles via direct interaction of tetrachloroauric acid with DNA. Colloid Polym Sci 2018. [DOI: 10.1007/s00396-018-4448-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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41
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Nanoparticles reveal Extreme Size-Sorting and Morphologies in Complex Coacervate Superstructures. Sci Rep 2018; 8:13820. [PMID: 30218047 PMCID: PMC6138629 DOI: 10.1038/s41598-018-32240-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 08/30/2018] [Indexed: 11/18/2022] Open
Abstract
We here provide detailed insight in self-assembled complex coacervate systems exploiting gold nanoparticles for cryoTEM contrast. Nanoparticle-containing dendrimicelles are formed from fifth-generation dendrimer-encapsulated nanoparticles (DENs) and dendrimer-stabilized nanoparticles (DSNs). The complex coacervate structures self-organize in biconcave thin water layers into size-sorted monolayer superstructures. The embedded nanoparticles are a straightforward tool to visualize dendrimicelles and determine the aggregation number and polydispersity. The superstructure shows extreme size-sorting patterns which, contrary to related systems with higher generation dendrimers, consists not only of dendrimicelles but also much bigger complex coacervate nanoassemblies, such as vesicles.
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42
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Martínez Á, Scrimin P. Gold nanoparticles crosslinking by peptides and amino acids: A tool for the colorimetric identification of amino acids. Biopolymers 2018. [DOI: 10.1002/bip.23111] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Álvaro Martínez
- Department of Chemical Sciences; University of Padova, via Marzolo, 1; Padova 35131 Italy
| | - Paolo Scrimin
- Department of Chemical Sciences; University of Padova, via Marzolo, 1; Padova 35131 Italy
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