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Mainali BP, Pattadar DK, Sharma JN, Zamborini FP. Electrochemical Analysis of the Thermal Stability of 0.9-4.1 nm Diameter Gold Nanoclusters. Anal Chem 2023. [PMID: 37506045 DOI: 10.1021/acs.analchem.3c01404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2023]
Abstract
Here we report the thermal properties of weakly stabilized 0.9, 1.6, and 4.1 nm Au nanoparticles (NPs)/nanoclusters (NCs) attached to indium-tin-oxide- or fluorine-doped-tin-oxide-coated glass electrodes (glass/ITO or glass/FTO). The peak oxidation potential (Ep) for Au measured by anodic stripping voltammetry (ASV) is indicative of the NP/NC size. Heating leads to a positive shift in Ep due to an increase in NP/NC size from thermal ripening. The size transition temperature (Tt) decreases with decreasing NP/NC size following the order of 4.1 nm (509 °C) > 1.6 nm (132 °C) > 0.9 nm (90 °C/109 °C, two transitions) as compared to the bulk melting point (Tm,b) for Au of 1064 °C. The Tt generally agrees with models describing the size-dependent melting point of Au NPs (Tm,NP) for 4.1 and 1.6 nm diameter Au NPs but is higher than the models for 0.9 nm Au NCs. Scanning electron microscopy (SEM) and UV-vis size analysis confirm the electrochemical results. The thermal stability of electrode-supported metal NPs/NCs is important for their effective use in catalysis, sensing, nanoelectronics, photovoltaics, and other applications.
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Affiliation(s)
- Badri P Mainali
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - Dhruba K Pattadar
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - Jay N Sharma
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - Francis P Zamborini
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
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Zhang H, Douglas JF. Glassy Interfacial Dynamics of Ni Nanoparticles: Part II Discrete Breathers as an Explanation of Two-Level Energy Fluctuations. SOFT MATTER 2013; 9:1266-1280. [PMID: 23585770 PMCID: PMC3622713 DOI: 10.1039/c2sm27533c] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Recent studies of the dynamics of diverse condensed amorphous materials have indicated significant heterogeneity in the local mobility and a progressive increase in collective particle motion upon cooling that takes the form of string-like particle rearrangements. In a previous paper (Part I), we examined the possibility that fluctuations in potential energy E and particle mobility μ associated with this 'dynamic heterogeneity' might offer information about the scale of collective motion in glassy materials based on molecular dynamics simulations of the glassy interfacial region of Ni nanoparticles (NPs) at elevated temperatures. We found that the noise exponent associated with fluctuations in the Debye-Waller factor, a mobility related quantity, was directly proportional to the scale of collective motion L under a broad range of conditions, but the noise exponent associated with E(t) fluctuations was seemingly unrelated to L. In the present work, we focus on this unanticipated difference between potential energy and mobility fluctuations by examining these quantities at an atomic scale. We find that the string atoms exhibit a jump-like motion between two well-separated bands of energy states and the rate at which these jumps occur seems to be consistent with the phenomenology of the 'slow-beta' relaxation process of glass-forming liquids. Concurrently with these local E(t) jumps, we also find 'quake-like' particle displacements having a power-law distribution in magnitude so that particle displacement fluctuations within the strings are strikingly different from local E(t) fluctuations. An analysis of these E(t) fluctuations suggests that we are dealing with 'discrete breather' excitations in which large energy fluctuations develop in arrays of non-linear oscillators by virtue of large anharmonicity in the interparticle interactions and discreteness effects associated with particle packing. We quantify string collective motions on a fast caging times scale (picoseconds) and explore the significance of these collective motions for understanding the Boson peak of glass-forming materials.
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Affiliation(s)
- Hao Zhang
- Department of Chemical and Materials Engineering, University of Alberta, AB T6G 2V4 Canada
| | - Jack F. Douglas
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland, 20899 USA
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Chien CH, Blaisten-Barojas E, Pederson MR. Many-body potential and structure for rhodium clusters. J Chem Phys 2000. [DOI: 10.1063/1.480794] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Phases and Phase Changes of Small Systems. ACTA ACUST UNITED AC 1999. [DOI: 10.1007/978-3-642-58389-6_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Michaelian K. A symbiotic algorithm for finding the lowest energy isomers of large clusters and molecules. Chem Phys Lett 1998. [DOI: 10.1016/s0009-2614(98)00733-7] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Rytkönen A, Valkealahti S, Manninen M. Melting and evaporation of argon clusters. J Chem Phys 1997. [DOI: 10.1063/1.473327] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Posada-Amarillas A, Garzón IL. Vibrational analysis of Nin clusters. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:10362-10365. [PMID: 9984824 DOI: 10.1103/physrevb.54.10362] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Posada-Amarillas A, Garzón IL. Microstructural analysis of simulated liquid and amorphous Ni. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:8363-8368. [PMID: 9982338 DOI: 10.1103/physrevb.53.8363] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Vlastou-Tsinganos G, Flytzanis N, Mistriotis AD. Simulation of the melting behavior of small silicon clusters. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:13697-13704. [PMID: 9978174 DOI: 10.1103/physrevb.51.13697] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Rey C, Gallego LJ. Structure, melting, and order tendencies of A13B13 Lennard-Jones heteroclusters with additive and nonadditive collision diameters. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:13691-13696. [PMID: 9978173 DOI: 10.1103/physrevb.51.13691] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Gallego LJ, Grimson MJ, Rey C. Melting of A12B Lennard-Jones heteroclusters: A comparative simulation study. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:5518-5521. [PMID: 9979447 DOI: 10.1103/physrevb.51.5518] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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García-Rodeja J, Rey C, Gallego LJ, Alonso JA. Molecular-dynamics study of the structures, binding energies, and melting of clusters of fcc transition and noble metals using the Voter and Chen version of the embedded-atom model. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:8495-8498. [PMID: 10009621 DOI: 10.1103/physrevb.49.8495] [Citation(s) in RCA: 69] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Rey C, Gallego LJ, Alonso JA. Molecular-dynamics study of the structure, binding energy, and melting of small clusters of fullerene molecules using Girifalco's spherical model. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:8491-8494. [PMID: 10009620 DOI: 10.1103/physrevb.49.8491] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Rey C, Gallego LJ, García-Rodeja J, Alonso JA, Iñiguez MP. Molecular-dynamics study of the binding energy and melting of transition-metal clusters. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:8253-8262. [PMID: 10007016 DOI: 10.1103/physrevb.48.8253] [Citation(s) in RCA: 74] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Solid-liquid phase transition of tin particles observed by UHV high resolution transmission electron microscopy: pseudo-crystalline phase. ACTA ACUST UNITED AC 1993. [DOI: 10.1007/bf01436546] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Ben‐Horin N, Even U, Jortner J. Spectroscopic interrogation of heterocluster isomerization. I. Simulations of nuclear dynamics and electronic spectroscopy. J Chem Phys 1992. [DOI: 10.1063/1.463711] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Cai ZX, Mahanti SD, Antonelli A, Khanna SN, Jena P. Thermal stability and structural transition in Be microclusters. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:7841-7845. [PMID: 10002525 DOI: 10.1103/physrevb.46.7841] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Vlachos DG, Schmidt LD, Aris R. Structures of small metal clusters. II. Phase transitions and isomerization. J Chem Phys 1992. [DOI: 10.1063/1.462583] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Blaisten-Barojas E, Zachariah MR. Molecular-dynamics study of cluster growth by cluster-cluster collisions. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 45:4403-4408. [PMID: 10002057 DOI: 10.1103/physrevb.45.4403] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Molecular dynamics calculation of half-lives for thermal decay of Lennard-Jones clusters. ACTA ACUST UNITED AC 1991. [DOI: 10.1007/bf01426618] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Temperature-induced structural transitions and vibrational properties of microclusters: ab-initio molecular dynamics studies. ACTA ACUST UNITED AC 1991. [DOI: 10.1007/bf01543983] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ercolessi F, Andreoni W, Tosatti E. Melting of small gold particles: Mechanism and size effects. PHYSICAL REVIEW LETTERS 1991; 66:911-914. [PMID: 10043938 DOI: 10.1103/physrevlett.66.911] [Citation(s) in RCA: 119] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Stillinger FH, Stillinger DK. Computational study of transition dynamics in 55‐atom clusters. J Chem Phys 1990. [DOI: 10.1063/1.459488] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Blaisten-Barojas E, Nyden MR. Molecular dynamics study of the depolymerization reaction in simple polymers. Chem Phys Lett 1990. [DOI: 10.1016/0009-2614(90)85253-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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