1
|
Mendoza-Cruz R, Palomares-Báez JP, López-López SM, Montejano-Carrizales JM, Rodríguez López JL, José Yacamán M, Bazán-Díaz L. Experimental High-Resolution Observation of the Truncated Double-Icosahedron Structure: A Stable Twinned Shell in Alloyed Au-Ag Core@Shell Nanoparticles. NANO LETTERS 2024; 24:4072-4081. [PMID: 38557078 PMCID: PMC11010228 DOI: 10.1021/acs.nanolett.3c04435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 03/26/2024] [Accepted: 03/27/2024] [Indexed: 04/04/2024]
Abstract
Given the binary nature of nanoalloy systems, their properties are dependent on their size, shape, structure, composition, and chemical ordering. When energy and entropic factors for shapes and structure variations are considered in nanoparticle growth, the spectra of shapes become so vast that even metastable arrangements have been reported under ambient conditions. Experimental and theoretical variations of multiply twinned particles have been observed, from the Ino and Marks decahedra to polyicosahedra and polydecahedra with comparable energetic stability among them. Herein, we report the experimental production of a stable doubly truncated double-icosahedron structure (TdIh) in Au-Ag nanoparticles, in which a twinned Ag-rich alloyed shell is reconstructed on a Au-Ag alloyed Ino-decahedral core. The structure, chemical composition, and growth pathway are proposed on the basis of high-angle annular dark-field scanning transmission electron microscopy analysis and excess energy calculations, while its structural stability is estimated by large-scale atomic molecular dynamics simulations. This novel nanostructure differs from other structures previously reported.
Collapse
Affiliation(s)
- Rubén Mendoza-Cruz
- Instituto
de Investigaciones en Materiales, Universidad
Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Ciudad de México, Mexico 04510
| | - Juan Pedro Palomares-Báez
- Facultad
de Ciencias Químicas, Universidad
Autónoma de Chihuahua, Circuito Universitario s/n, Campus II, Chihuahua, Mexico 31125
| | - Stephan Mario López-López
- Instituto
de Investigaciones en Materiales, Universidad
Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Ciudad de México, Mexico 04510
- Posgrado
en Ciencia e Ingeniería de Materiales, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Ciudad de México, Mexico 04510
| | | | - José Luis Rodríguez López
- Advanced
Materials Department, Instituto Potosino
de Investigación Científica y Tecnológica, A.C., San Luis Potosí, Mexico 78216
| | - Miguel José Yacamán
- Department
of Applied Physics and Materials Science and MIRA, Northern Arizona University, Flagstaff, Arizona 86011, United States
| | - Lourdes Bazán-Díaz
- Instituto
de Investigaciones en Materiales, Universidad
Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Ciudad de México, Mexico 04510
| |
Collapse
|
2
|
Gale CD, Levinger NE. Predicting the Geometry of Core-Shell Structures: How a Shape Changes with Constant Added Thickness. J Phys Chem B 2024; 128:1317-1324. [PMID: 38288994 DOI: 10.1021/acs.jpcb.3c07652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
The core-shell assembly motif is ubiquitous in chemistry. While the most obvious examples are core/shell-type nanoparticles, many other examples exist. The shape of the core/shell constructs is poorly understood, making it impossible to separate chemical effects from geometric effects. Here, we create a model for the core/shell construct and develop proof for how the eccentricity is expected to change as a function of the shell. We find that the addition of a constant thickness shell always creates a relatively more spherical shape for all shapes covered by our model unless the shape is already spherical or has some underlying radial symmetry. We apply this work to simulated AOT reverse micelles and demonstrate that it is remarkably successful at explaining the observed shapes of the chemical systems. We identify the three specific cases where the model breaks down and how this impacts eccentricity.
Collapse
Affiliation(s)
- Christopher D Gale
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Nancy E Levinger
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| |
Collapse
|
3
|
Ruderman A, Oviedo MB, Paz SA, Leiva EPM. Diversity of Behavior after Collisions of Sn and Si Nanoparticles Found Using a New Density Functional Tight-Binding Method. J Phys Chem A 2023; 127:8955-8965. [PMID: 37831543 DOI: 10.1021/acs.jpca.3c05534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2023]
Abstract
We present a new approach to studying nanoparticle collisions using density functional based tight binding (DFTB). A novel DFTB parametrization has been developed to study the collision process of Sn and Si clusters (NPs) using molecular dynamics (MD). While bulk structures were used as training sets, we show that our model is able to accurately reproduce the cohesive energy of the nanoparticles using density functional theory (DFT) as a reference. A surprising variety of phenomena are revealed for the Si/Sn nanoparticle collisions, depending on the size and velocity of the collision: from core-shell structure formation to bounce-off phenomena.
Collapse
Affiliation(s)
- Andrés Ruderman
- Facultad de Matemática, Astronomía Física y Computación, Universidad Nacional de Córdoba, Córdoba X5000HUA, Argentina
- Consejo Nacional de Investigaciones Cientıficas y Técnicas (CONICET), Instituto de Física Enrique Gaviola (IFEG), Córdoba X5000HUA, Argentina
| | - María Belén Oviedo
- Facultad de Ciencias Quımicas, Departamento de Quımica Teórica y Computacional, Universidad Nacional de Córdoba, Córdoba X5000HUA, Argentina
- Consejo Nacional de Investigaciones Cientıficas y Técnicas (CONICET), Instituto de Fisicoquımica de Córdoba (INFIQC), Córdoba X5000HUA, Argentina
| | - Sergio Alexis Paz
- Facultad de Ciencias Quımicas, Departamento de Quımica Teórica y Computacional, Universidad Nacional de Córdoba, Córdoba X5000HUA, Argentina
- Consejo Nacional de Investigaciones Cientıficas y Técnicas (CONICET), Instituto de Fisicoquımica de Córdoba (INFIQC), Córdoba X5000HUA, Argentina
| | - Ezequiel P M Leiva
- Facultad de Ciencias Quımicas, Departamento de Quımica Teórica y Computacional, Universidad Nacional de Córdoba, Córdoba X5000HUA, Argentina
- Consejo Nacional de Investigaciones Cientıficas y Técnicas (CONICET), Instituto de Fisicoquımica de Córdoba (INFIQC), Córdoba X5000HUA, Argentina
| |
Collapse
|
4
|
Ball-Cup, Janus, core-shell and disordered-alloy rhodium-gold nanoparticles: An atomistic simulation on structural stability. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
5
|
Akbarzadeh H, Mehrjouei E, Abbaspour M, Salemi S, Yaghoubi H, Ramezanzadeh S. Boron Nitride- and Graphene-Supported Trimetallic Yolk–Shell and Hollow Nanoparticles. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c00574] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Hamed Akbarzadeh
- Department of Chemistry, Faculty of Basic Sciences, Hakim Sabzevari University, Sabzevar 96179- 76487, Iran
- Department of Physical Chemistry, Faculty of Chemistry, Kharazmi University, Tehran 15719-14911, Iran
| | - Esmat Mehrjouei
- Department of Chemistry, Faculty of Basic Sciences, Hakim Sabzevari University, Sabzevar 96179- 76487, Iran
| | - Mohsen Abbaspour
- Department of Chemistry, Faculty of Basic Sciences, Hakim Sabzevari University, Sabzevar 96179- 76487, Iran
- Department of Chemistry, Faculty of Basic Sciences, Ferdowsi University of Mashhad, Mashhad 9177948974, Iran
| | - Sirous Salemi
- Department of Chemistry, Faculty of Basic Sciences, Hakim Sabzevari University, Sabzevar 96179- 76487, Iran
| | - Hamzeh Yaghoubi
- Department of Chemistry, Faculty of Basic Sciences, Hakim Sabzevari University, Sabzevar 96179- 76487, Iran
| | - Samira Ramezanzadeh
- Department of Chemistry, Faculty of Basic Sciences, Hakim Sabzevari University, Sabzevar 96179- 76487, Iran
| |
Collapse
|
6
|
Lee HW, Jung E, Han GH, Kim MC, Kim D, Lee KY, Han SS, Yu T. Three-in-One Strategy to Improve Both Catalytic Activity and Selectivity: Nonconcentric Pd-Au Nanoparticles. J Phys Chem Lett 2021; 12:11098-11105. [PMID: 34752106 DOI: 10.1021/acs.jpclett.1c03256] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In direct H2O2 synthesis, the Pd-Au alloy was considered as a potential catalyst because of its much better performance compared to the prototype Pd; unfortunately, achieving both high activity and selectivity remains a challenge. Here, we synthesized nonconcentric Pd-Au NPs in which Au domain shells are formed only partially on Pd domain cores and tested them for direct H2O2 synthesis. It has three exposed regions of Pd, Au domains, and Pd-Au interfaces in a single NP (hence, a 3-in-1 strategy). Creating nonconcentric forms was demonstrated convincingly by density functional theory calculations. The nonconcentric Pd-Au particles exhibit high and well-balanced performances that are hard to achieve with traditional alloyed Pd-Au. The number of Pd/Au interfaces was found to be the key factor and thus was optimized by controlling the Au precursor concentrations. The hitherto underutilized structure of nonconcentric bimetallic alloys can be useful and thus should be more actively investigated for catalyst development.
Collapse
Affiliation(s)
- Hong Woo Lee
- Computational Science Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
- Department of Chemical and Biological Engineering, Korea University, 145 Anam-ro, Seoul 02841, Republic of Korea
| | - Euiyoung Jung
- Department of Chemical Engineering, Integrated Engineering Major, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Geun-Ho Han
- Department of Chemical and Biological Engineering, Korea University, 145 Anam-ro, Seoul 02841, Republic of Korea
| | - Min-Cheol Kim
- Computational Science Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Donghun Kim
- Computational Science Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Kwan-Young Lee
- Department of Chemical and Biological Engineering, Korea University, 145 Anam-ro, Seoul 02841, Republic of Korea
| | - Sang Soo Han
- Computational Science Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Taekyung Yu
- Department of Chemical Engineering, Integrated Engineering Major, Kyung Hee University, Yongin 17104, Republic of Korea
| |
Collapse
|
7
|
Nelli D, Pietrucci F, Ferrando R. Impurity diffusion in magic-size icosahedral clusters. J Chem Phys 2021; 155:144304. [PMID: 34654289 DOI: 10.1063/5.0060236] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Atomic diffusion is at the basis of chemical ordering transformations in nanoalloys. Understanding the diffusion mechanisms at the atomic level is therefore a key issue in the study of the thermodynamic behavior of these systems and, in particular, of their evolution from out-of-equilibrium chemical ordering types often obtained in the experiments. Here, the diffusion is studied in the case of a single-atom impurity of Ag or Au moving within otherwise pure magic-size icosahedral clusters of Cu or Co by means of two different computational techniques, i.e., molecular dynamics and metadynamics. Our simulations reveal unexpected diffusion pathways, in which the displacement of the impurity is coupled with the creation of vacancies in the central part of the cluster. We show that the observed mechanism is quite different from the vacancy-mediated diffusion processes identified so far, and we demonstrate that it can be related to the presence of non-homogeneous compressive stress in the inner part of the icosahedral structure.
Collapse
Affiliation(s)
- Diana Nelli
- Dipartimento di Fisica dell'Università di Genova, via Dodecaneso 33, Genova 16146, Italy
| | - Fabio Pietrucci
- Sorbonne Université, Muséum National d'Histoire Naturelle, UMR CNRS 7590, IMPMC, 75005 Paris, France
| | - Riccardo Ferrando
- Dipartimento di Fisica dell'Università di Genova and CNR-IMEM, via Dodecaneso 33, Genova 16146, Italy
| |
Collapse
|
8
|
Zhou M, Xu Y, Cui Y, Zhang X, Kong X. Search for Global Minimum Structures of P 2 n + 1 + ( n = 1-15) Using xTB-Based Basin-Hopping Algorithm. Front Chem 2021; 9:694156. [PMID: 34381759 PMCID: PMC8350033 DOI: 10.3389/fchem.2021.694156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 07/15/2021] [Indexed: 11/13/2022] Open
Abstract
A new program for searching global minimum structures of atomic clusters using basin-hopping algorithm based on the xTB method was developed here. The program can be performed with a much higher speed than its replacement directly based on DFT methods. Considering the structural varieties and complexities in finding their global minimum structures, phosphorus cluster cations were studied by the program. The global minimum structures of cationic P2n+1+ (n = 1–15) clusters are determined through the unbiased structure searching method. In the last step, further DFT optimization was performed for the selected isomers. For P2n+1+ (n = 1–4, 7), the found global minimum structures are in consistent with the ones previously reported; while for P2n+1+ (n = 5, 6, 8–12), newly found isomers are more energy-favorable than those previously reported. And those for P2n+1+ (n = 13–15) are reported here for the first time. Among them, the most stable isomers of P2n+1+ (n = 4–6, 9) are characterized by their C3v, Cs, C2v and Cs symmetry, in turn. But those of P2n+1+ (n = 7, 8, 10–12), no symmetry has been identified. The most stable isomers of P29+ and P31+ are characterized by single P-P bonds bridging units inside the clusters. Further analysis shows that the pnicogen bonds play an important role in the stabilization of these clusters. These results show that the new developed program is effective and robust in searching global minimum structures for atom clusters, and it also provides new insights into the role of pnicogen bonds in phosphorus clusters.
Collapse
Affiliation(s)
- Min Zhou
- School of Physics and Electronic Information, Anhui Normal University, Wuhu, China.,The State Key Laboratory and Institute of Elemento-Organic Chemistry, Collage of Chemistry, Nankai University, Tianjin, China
| | - Yicheng Xu
- The State Key Laboratory and Institute of Elemento-Organic Chemistry, Collage of Chemistry, Nankai University, Tianjin, China
| | - Yongliang Cui
- The State Key Laboratory and Institute of Elemento-Organic Chemistry, Collage of Chemistry, Nankai University, Tianjin, China
| | - Xianyi Zhang
- School of Physics and Electronic Information, Anhui Normal University, Wuhu, China
| | - Xianglei Kong
- The State Key Laboratory and Institute of Elemento-Organic Chemistry, Collage of Chemistry, Nankai University, Tianjin, China.,Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin, China
| |
Collapse
|
9
|
Neumaier M, Baksi A, Weis P, Schneider EK, Chakraborty P, Hahn H, Pradeep T, Kappes MM. Kinetics of Intercluster Reactions between Atomically Precise Noble Metal Clusters [Ag 25(DMBT) 18] - and [Au 25(PET) 18] - in Room Temperature Solutions. J Am Chem Soc 2021; 143:6969-6980. [PMID: 33913724 DOI: 10.1021/jacs.1c01140] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The kinetics of intercluster metal atom exchange reactions between solvated [Ag25(DMBT)18]- and [Au25(PET)18]- (DMBT and PET are 2,4-dimethylbenzenethiol and 2-phenylethanethiol, respectively, both C8H10S) were probed by electrospray ionization mass spectrometry and computer-based modeling. Anion mass spectra and collision induced dissociation (CID) measurements show that both cluster monomers and dimers are involved in the reactions. We have modeled the corresponding kinetics assuming a reaction mechanism in which metal atom exchange occurs through transient dimers. Our kinetic model contains three types of generic reactions: dimerization of monomers, metal atom exchange in the transient dimers, and dissociation of the dimers to monomers. There are correspondingly 377 discrete species connected by in total 1302 reactions (i.e., dimerization, dissociation and atom exchange reactions) leading to the entire series of monomeric and dimeric products [AgmAu25-m]- (m = 1-24) and [AgmAu50-m]2- (m = 0-50), respectively. The rate constants of the corresponding reactions were fitted to the experimental data, and good agreement was obtained with exchange rate constants which scale with the probability of finding a silver or gold atom in the respective monomeric subunit of the dimer, i.e., reflecting an entropic driving force for alloying. Allowing the dimerization rate constant to scale with increasing gold composition of the respective reactants improves the agreement further. The rate constants obtained are physically plausible, thus strongly supporting dimer-mediated metal atom exchange in this intercluster reaction system.
Collapse
Affiliation(s)
- Marco Neumaier
- Institute of Nanotechnology, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
| | - Ananya Baksi
- Institute of Nanotechnology, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
| | - Patrick Weis
- Institute of Physical Chemistry, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
| | - Erik K Schneider
- Institute of Physical Chemistry, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
| | - Papri Chakraborty
- Institute of Nanotechnology, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany.,Institute of Physical Chemistry, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
| | - Horst Hahn
- Institute of Nanotechnology, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
| | - Thalappil Pradeep
- DST Unit of Nanoscience and Thematic Unit of Excellence, Indian Institute of Technology Madras, 600 036 Chennai, India
| | - Manfred M Kappes
- Institute of Nanotechnology, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany.,Institute of Physical Chemistry, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
| |
Collapse
|
10
|
Akbarzadeh H, Mehrjouei E, Abbaspour M, Shamkhali AN. Melting Behavior of Bimetallic and Trimetallic Nanoparticles: A Review of MD Simulation Studies. Top Curr Chem (Cham) 2021; 379:22. [PMID: 33890199 DOI: 10.1007/s41061-021-00332-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 03/18/2021] [Indexed: 10/21/2022]
Abstract
In recent years, bimetallic and trimetallic nanoparticles (NPs) have become attractive materials for many researchers especially in the field of catalysis due to their interesting physical and chemical properties. These unique properties arise mainly from simultaneous effects of two different metal atoms in their structure. In this review, recent theoretical studies on these NPs using molecular dynamics simulation are presented. Since investigation of thermodynamic stabilities of metallic NPs is a critical factor in their construction for catalytic applications, our focus in this review is on the thermal stability of bimetallic and trimetallic NPs. The melting behavior of these materials with different atomic arrangements including core-shell, three-shell, crown-jewel, ordered and disordered alloy, and Janus materials are discussed. Other factors including stress, strain, atomic radius, thermal expansion coefficient, cohesive energy, surface energy, size, composition, and morphology are described in detail, because these properties lead to complexity in the melting behavior of bimetallic and trimetallic NPs.
Collapse
Affiliation(s)
- Hamed Akbarzadeh
- Department of Chemistry, Faculty of Basic Sciences, Hakim Sabzevari University, 96179-76487, Sabzevar, Iran.
| | - Esmat Mehrjouei
- Department of Chemistry, Faculty of Basic Sciences, Hakim Sabzevari University, 96179-76487, Sabzevar, Iran
| | - Mohsen Abbaspour
- Department of Chemistry, Faculty of Basic Sciences, Hakim Sabzevari University, 96179-76487, Sabzevar, Iran
| | - Amir Nasser Shamkhali
- Department of Chemistry, Faculty of Basic Sciences, University of Mohaghegh Ardabili, 56199-11367, Ardabil, Iran
| |
Collapse
|
11
|
Taran S, Arslan H. Stability and magnetic behaviour of 19-, 23- and 26-atom trimetallic Pt–Ni–Ag nanoalloys. Mol Phys 2020. [DOI: 10.1080/00268976.2020.1818859] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Songül Taran
- Department of Physics, Duzce University, Duzce, Turkey
| | - Haydar Arslan
- Department of Physics, Zonguldak Bulent Ecevit University, Zonguldak, Turkey
| |
Collapse
|
12
|
Huynh KH, Pham XH, Kim J, Lee SH, Chang H, Rho WY, Jun BH. Synthesis, Properties, and Biological Applications of Metallic Alloy Nanoparticles. Int J Mol Sci 2020; 21:E5174. [PMID: 32708351 PMCID: PMC7404399 DOI: 10.3390/ijms21145174] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 07/17/2020] [Accepted: 07/18/2020] [Indexed: 12/23/2022] Open
Abstract
Metallic alloy nanoparticles are synthesized by combining two or more different metals. Bimetallic or trimetallic nanoparticles are considered more effective than monometallic nanoparticles because of their synergistic characteristics. In this review, we outline the structure, synthesis method, properties, and biological applications of metallic alloy nanoparticles based on their plasmonic, catalytic, and magnetic characteristics.
Collapse
Affiliation(s)
- Kim-Hung Huynh
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 143-701, Korea; (K.-H.H.); (X.-H.P.); (J.K.)
| | - Xuan-Hung Pham
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 143-701, Korea; (K.-H.H.); (X.-H.P.); (J.K.)
| | - Jaehi Kim
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 143-701, Korea; (K.-H.H.); (X.-H.P.); (J.K.)
| | - Sang Hun Lee
- Department of Bioengineering, University of California, Berkeley, CA 94720-1762, USA;
| | - Hyejin Chang
- Division of Science Education, Kangwon National University, Chuncheon 24341, Korea;
| | - Won-Yeop Rho
- School of International Engineering and Science, Jeonbuk National University, Jeonju 54896, Korea;
| | - Bong-Hyun Jun
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 143-701, Korea; (K.-H.H.); (X.-H.P.); (J.K.)
| |
Collapse
|
13
|
Investigation of the Chemical Ordering and Structural Properties of the Trimetallic (PtNi)@Ag Nanoalloys. J CLUST SCI 2020. [DOI: 10.1007/s10876-020-01778-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
|
14
|
Rossi K, Asara GG, Baletto F. Structural Screening and Design of Platinum Nanosamples for Oxygen Reduction. ACS Catal 2020. [DOI: 10.1021/acscatal.9b05202] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Kevin Rossi
- Physics Department, King’s College London, Strand, WC2R 2LS, United Kingdom
- Laboratory of Computational Science and Modeling (COSMO), Institute of Materials, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, 1015, Switzerland
| | - Gian Giacomo Asara
- Physics Department, King’s College London, Strand, WC2R 2LS, United Kingdom
| | - Francesca Baletto
- Physics Department, King’s College London, Strand, WC2R 2LS, United Kingdom
| |
Collapse
|
15
|
Schnedlitz M, Fernandez-Perea R, Knez D, Lasserus M, Schiffmann A, Hofer F, Hauser AW, de Lara-Castells MP, Ernst WE. Effects of the Core Location on the Structural Stability of Ni-Au Core-Shell Nanoparticles. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2019; 123:20037-20043. [PMID: 33014236 PMCID: PMC7526986 DOI: 10.1021/acs.jpcc.9b05765] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 07/18/2019] [Indexed: 05/14/2023]
Abstract
Structural changes of Ni-Au core-shell nanoparticles with increasing temperature are studied at atomic resolution. The bimetallic clusters, synthesized in superfluid helium droplets, show a centralized Ni core, which is an intrinsic feature of the growth process inside helium. After deposition on SiN x , the nanoparticles undergo a programmed temperature treatment in vacuum combined with an in situ transmission electron microscopy study of structural changes. We observe not only full alloying far below the actual melting temperature, but also a significantly higher stability of core-shell structures with decentralized Ni cores. Explanations are provided by large-scale molecular dynamics simulations on model structures consisting of up to 3000 metal atoms. Two entirely different diffusion processes can be identified for both types of core-shell structures, strikingly illustrating how localized, atomic features can still dictate the overall behavior of a nanometer-sized particle.
Collapse
Affiliation(s)
- Martin Schnedlitz
- Institute
of Experimental Physics, Graz University
of Technology, Petersgasse 16, A-8010 Graz, Austria
| | | | - Daniel Knez
- Institute
for Electron Microscopy and Nanoanalysis & Graz Centre for Electron
Microscopy, Graz University of Technology, Steyrergasse 17, A-8010 Graz, Austria
| | - Maximilian Lasserus
- Institute
of Experimental Physics, Graz University
of Technology, Petersgasse 16, A-8010 Graz, Austria
| | - Alexander Schiffmann
- Institute
of Experimental Physics, Graz University
of Technology, Petersgasse 16, A-8010 Graz, Austria
| | - Ferdinand Hofer
- Institute
for Electron Microscopy and Nanoanalysis & Graz Centre for Electron
Microscopy, Graz University of Technology, Steyrergasse 17, A-8010 Graz, Austria
| | - Andreas W. Hauser
- Institute
of Experimental Physics, Graz University
of Technology, Petersgasse 16, A-8010 Graz, Austria
- E-mail: (A.W.H.)
| | | | - Wolfgang E. Ernst
- Institute
of Experimental Physics, Graz University
of Technology, Petersgasse 16, A-8010 Graz, Austria
- E-mail: . Phone: +43 (316) 873-8140 (W.E.E.)
| |
Collapse
|
16
|
Baletto F. Structural properties of sub-nanometer metallic clusters. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2019; 31:113001. [PMID: 30562724 DOI: 10.1088/1361-648x/aaf989] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
At the nanoscale, the investigation of structural features becomes fundamental as we can establish relationships between cluster geometries and their physicochemical properties. The peculiarity lies in the variety of shapes often unusual and far from any geometrical and crystallographic intuition clusters can assume. In this respect, we should treat and consider nanoparticles as a new form of matter. Nanoparticle structures depend on their size, chemical composition, ordering, as well as external conditions e.g. synthesis method, pressure, temperature, support. On top of that, at finite temperatures nanoparticles can fluctuate among different structures, opening new and exciting horizons for the design of optimal nanoparticles for advanced applications. This article aims to overview geometrical features of transition metal clusters and of their various rearrangements.
Collapse
Affiliation(s)
- Francesca Baletto
- Physics Department, King's College London, WC2R 2LS, London, United Kingdom
| |
Collapse
|
17
|
Crawford SE, Hartmann MJ, Millstone JE. Surface Chemistry-Mediated Near-Infrared Emission of Small Coinage Metal Nanoparticles. Acc Chem Res 2019; 52:695-703. [PMID: 30742413 DOI: 10.1021/acs.accounts.8b00573] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
From size-dependent luminescence to localized surface plasmon resonances, the optical properties that emerge from common materials with nanoscale dimensions have been revolutionary. As nanomaterials get smaller, they approach molecular electronic structures, and this transition from bulk to molecular electronic properties is a subject of far-reaching impact. One class of nanomaterials that exhibit particularly interesting optoelectronic features at this size transition are coinage metal (i.e., group 11 elements copper, silver, and gold) nanoparticles with core diameters between approximately 1 to 3 nm (∼25-200 atoms). Coinage metal nanoparticles can exhibit red or near-infrared photoluminescence features that are not seen in either their molecular or larger nanoscale counterparts. This emission has been exploited both as a probe of electronic behavior at the nanoscale as well as in critical applications such as biological imaging and chemical sensing. Interestingly, it has been demonstrated that their photoluminescence figures of merit such as emission quantum yield, energy, and lifetime are largely independent of particle diameter. Instead, emission from particles at this size range depends heavily on the particle surface chemistry, which includes both its metallic composition and the capping ligand architecture. The strong influence of surface chemistry on these emergent optoelectronic phenomena has powerful implications for both the study and use of these particles, primarily due to the theoretically limitless possible surface ligand architectures and metallic compositions. In this Account, we highlight recent work that studies and uses surface chemistry-mediated photoluminescence from coinage metal nanoparticles. Specifically, we emphasize the distinct, as well as synergistic, roles of the nanoparticle capping ligand and the nanoparticle core for controlling and/or enhancing their near-infrared photoluminescence. We then discuss the implications of surface chemistry-mediated photoluminescence as it relates to downstream applications such as energy transfer, sensing, and biological imaging. We conclude by discussing current challenges that remain in the field, including opportunities to develop new particle synthetic routes, analytical tools, and physical frameworks with which to understand small nanoparticle emission. Taken together, we anticipate that these materials will be foundational both in understanding the unique transition from molecular to bulk electronic structures and in the development of nanomaterials that leverage this transition.
Collapse
Affiliation(s)
- Scott E. Crawford
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Michael J. Hartmann
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Jill E. Millstone
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| |
Collapse
|
18
|
Grammatikopoulos P, Sowwan M, Kioseoglou J. Computational Modeling of Nanoparticle Coalescence. ADVANCED THEORY AND SIMULATIONS 2019. [DOI: 10.1002/adts.201900013] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Panagiotis Grammatikopoulos
- Nanoparticles by Design Unit Okinawa Institute of Science and Technology Graduate University 1919‐1 Onna‐Son Okinawa 904‐0495 Japan
| | - Mukhles Sowwan
- Nanoparticles by Design Unit Okinawa Institute of Science and Technology Graduate University 1919‐1 Onna‐Son Okinawa 904‐0495 Japan
| | - Joseph Kioseoglou
- Department of Physics Aristotle University of Thessaloniki GR‐54124 Thessaloniki Greece
| |
Collapse
|
19
|
Abbaspour M, Valizadeh Z, Jorabchi MN. Nucleation, coalescence, thermal evolution, and statistical probability of formation of Au/Ir/Pd nanoalloys in gas-phase condensation process. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.10.152] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
20
|
Tran VT, Kim J, Kim J, Lee D, Jeong KJ, Lee J. Optical Anisotropicity of Core-Shell or Yolk-Shell-typed Ag@Fe3
O4
Nanochains. B KOREAN CHEM SOC 2018. [DOI: 10.1002/bkcs.11587] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Van Tan Tran
- Departments of Cogno-Mechatronics Engineering; Pusan National University; Busan 46241 Republic of Korea
| | - Jeonghyo Kim
- Departments of Cogno-Mechatronics Engineering; Pusan National University; Busan 46241 Republic of Korea
| | - Jonghyeok Kim
- Departments of Cogno-Mechatronics Engineering; Pusan National University; Busan 46241 Republic of Korea
| | - Dongkyu Lee
- Departments of Cogno-Mechatronics Engineering; Pusan National University; Busan 46241 Republic of Korea
| | - Ki-Jae Jeong
- Departments of Cogno-Mechatronics Engineering; Pusan National University; Busan 46241 Republic of Korea
| | - Jaebeom Lee
- Departments of Cogno-Mechatronics Engineering; Pusan National University; Busan 46241 Republic of Korea
| |
Collapse
|
21
|
Yang Y, Yu H, Cai Y, Ferrando R, Cheng D. Origin of enhanced stability and oxygen adsorption capacity of medium-sized Pt-Ni nanoclusters. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:285503. [PMID: 29863492 DOI: 10.1088/1361-648x/aaca09] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Understanding the stability and adsorption properties of O atom can be considered as the first step to understand the mechanism of the oxygen reduction reaction on Pt-Ni nanoclusters. In this work, the equilibrium structures, stability, adsorption properties and deformation energies of medium-sized Pt-Ni nanoclusters are studied by global optimization method and density functional theory calculations. It is found that Pt-Ni nanoclusters are of more stable structure and larger oxygen adsorption energy than Pt nanoclusters, and the enhanced stability and oxygen adsorption capacity of Pt-Ni nanoclusters originate from both the strain and electronic factors. Based on the strain effect, the local pressures are on average much better equilibrated on Pt-Ni nanoclusters, bringing about the more stable structure. The elongation of the metal-metal bond distances results in the increase of adsorption energy of the O atom on Pt-Ni nanoclusters. Considering the electronic effect, the charge interaction between the LDOS (d orbital) of metal atoms adjacent to the adsorbed O atom and the DOS (p orbital) of the O atom gives rise to the increase of oxygen adsorption capacity on Pt-Ni nanoclusters. Simultaneously, the charge density difference analysis shows that the Ni atoms doping is conducive for O atom adsorption. In addition, the diffusion of O atom from surface to interior is difficult due to the high diffusion energy barriers. Our results show that both strain and electronic factors are of important effects on the stability and adsorption properties of nanoalloys.
Collapse
Affiliation(s)
- Yang Yang
- Beijing Key Laboratory of Energy Environmental Catalysis, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
| | | | | | | | | |
Collapse
|
22
|
Bimetallic Nanoparticles: Enhanced Magnetic and Optical Properties for Emerging Biological Applications. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8071106] [Citation(s) in RCA: 92] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
|
23
|
Akbarzadeh H, Abbaspour M, Mehrjouei E, Kamrani M. Stability Control of AgPd@Pt Trimetallic Nanoparticles via Ag–Pd Core Structure and Composition: A Molecular Dynamics Study. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b00447] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hamed Akbarzadeh
- Department of Chemistry, Faculty of Basic Sciences, Hakim Sabzevari University, 96179- 76487 Sabzevar, Iran
| | - Mohsen Abbaspour
- Department of Chemistry, Faculty of Basic Sciences, Hakim Sabzevari University, 96179- 76487 Sabzevar, Iran
| | - Esmat Mehrjouei
- Department of Chemistry, Faculty of Basic Sciences, Hakim Sabzevari University, 96179- 76487 Sabzevar, Iran
| | - Maliheh Kamrani
- Department of Chemistry, Faculty of Basic Sciences, Hakim Sabzevari University, 96179- 76487 Sabzevar, Iran
| |
Collapse
|
24
|
Akbarzadeh H, Mehrjouei E, Masoumi A, Sokhanvaran V. Pt-Pd nanoalloys with crown-jewel structures: How size of the mother Pt cluster affects on thermal and structural properties of Pt-Pd nanoalloys? J Mol Liq 2018. [DOI: 10.1016/j.molliq.2017.11.040] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
25
|
Akbarzadeh H, Mehrjouei E, Shamkhali AN, Abbaspour M, Salemi S, Ramezanzadeh S. Au@void@AgAu Yolk-Shell Nanoparticles with Dominant Strain Effects: A Molecular Dynamics Simulation. J Phys Chem Lett 2017; 8:5064-5068. [PMID: 28960993 DOI: 10.1021/acs.jpclett.7b02310] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Au@void@AgAu yolk-shell nanoparticles with different morphologies were studied by classical molecular dynamics simulation. The results indicated that all of simulated yolk-shell nanoclusters with ∼3.8 nm size and different morphologies are unstable at room temperature, and collapse of the shell atoms into the void space completely fills it and creates more stable Au@AgAu core-shell structures. Also, it was observed that thermodynamic stabilities of the created core-shell structures strongly depend on the morphology of nanocluster, for which competition between strain and surface energy effects plays the key role in this phenomenon. Within this competition, strain effect is dominant and helps the stability of the created core-shell structure. Herein, the icosahedral nanocluster with the lowest strain effect exhibits the highest thermodynamic stability. By comparing the simulation results with experimental data, it was concluded that the essential factor that controls the stability of these nanoparticles is their size.
Collapse
Affiliation(s)
- Hamed Akbarzadeh
- Department of Chemistry, Faculty of Basic Sciences, Hakim Sabzevari University , 96179-76487 Sabzevar, Iran
| | - Esmat Mehrjouei
- Department of Chemistry, Faculty of Basic Sciences, Hakim Sabzevari University , 96179-76487 Sabzevar, Iran
| | - Amir Nasser Shamkhali
- Department of Chemistry, Faculty of Sciences, University of Mohaghegh Ardabili , 56199-11367 Ardabil, Iran
| | - Mohsen Abbaspour
- Department of Chemistry, Faculty of Basic Sciences, Hakim Sabzevari University , 96179-76487 Sabzevar, Iran
| | - Sirous Salemi
- Department of Chemistry, Faculty of Basic Sciences, Hakim Sabzevari University , 96179-76487 Sabzevar, Iran
| | - Samira Ramezanzadeh
- Department of Chemistry, Faculty of Basic Sciences, Hakim Sabzevari University , 96179-76487 Sabzevar, Iran
| |
Collapse
|
26
|
Palomares-Baez JP, Panizon E, Ferrando R. Nanoscale Effects on Phase Separation. NANO LETTERS 2017; 17:5394-5401. [PMID: 28800237 DOI: 10.1021/acs.nanolett.7b01994] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Classical nucleation theory predicts that a binary system which is immiscible in the bulk should become miscible at the nanoscale when lowering its size below a critical size. Here we tackle the problem of miscibility in nanoalloys with a combination of ab initio and atomistic calculations, developing a statistical-mechanics approach for the free energy cost of forming phase-separated aggregates. We apply it to the controversial case of AuCo nanoalloys. AuCo is immiscible in the bulk, but a rich variety of nanoparticle configurations, both phase-separated and intermixed, have been obtained experimentally. Our calculations strongly point to the permanence of an equilibrium miscibility gap down to the nanoscale and to the nonexistence of a critical size below which phase separation is impossible. We show that this is due to nanoscale effects of general character, caused by the existence of preferred nucleation sites in nanoparticles, which lower the free-energy cost for phase separation with respect to bulk systems.
Collapse
Affiliation(s)
| | - Emanuele Panizon
- Dipartimento di Fisica, Università di Genova , Via Dodecaneso 33, Genova, I16146, Italy
| | - Riccardo Ferrando
- Dipartimento di Chimica e Chimica Industriale, Università di Genova , Via Dodecaneso 31, Genova, I16146, Italy
- CNR/IMEM , Via Dodecaneso 33, Genova, I16146, Italy
| |
Collapse
|
27
|
|
28
|
|
29
|
Different morphologies of aluminum nanoclusters: Effect of pressure on solid-liquid phase transition of the nanoclusters using molecular dynamics simulations. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2016.12.117] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
30
|
Liang YC, Liu RS, Xie Q, Tian ZA, Mo YF, Zhang HT, Liu HR, Hou ZY, Zhou LL, Peng P. Structural evolutions and hereditary characteristics of icosahedral nano-clusters formed in Mg 70Zn 30 alloys during rapid solidification processes. Sci Rep 2017; 7:43111. [PMID: 28230068 PMCID: PMC5322369 DOI: 10.1038/srep43111] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 01/19/2017] [Indexed: 01/01/2023] Open
Abstract
To investigate the structural evolution and hereditary mechanism of icosahedral nano-clusters formed during rapid solidification, a molecular dynamics (MD) simulation study has been performed for a system consisting of 107 atoms of liquid Mg70Zn30 alloy. Adopting Honeycutt-Anderson (HA) bond-type index method and cluster type index method (CTIM-3) to analyse the microstructures in the system it is found that for all the nano-clusters including 2~8 icosahedral clusters in the system, there are 62 kinds of geometrical structures, and those can be classified, by the configurations of the central atoms of basic clusters they contained, into four types: chain-like, triangle-tailed, quadrilateral-tailed and pyramidal-tailed. The evolution of icosahedral nano-clusters can be conducted by perfect heredity and replacement heredity, and the perfect heredity emerges when temperature is slightly less than Tm then increase rapidly and far exceeds the replacement heredity at Tg; while for the replacement heredity, there are three major modes: replaced by triangle (3-atoms), quadrangle (4-atoms) and pentagonal pyramid (6-atoms), rather than by single atom step by step during rapid solidification processes.
Collapse
Affiliation(s)
- Yong-Chao Liang
- School of Physics and Microelectronics Science, Hunan University, Changsha, 410082, China.,College of Big Data and Information Engineering, Guizhou University, Huaxi District, Guiyang, 550025, China
| | - Rang-Su Liu
- School of Physics and Microelectronics Science, Hunan University, Changsha, 410082, China
| | - Quan Xie
- College of Big Data and Information Engineering, Guizhou University, Huaxi District, Guiyang, 550025, China
| | - Ze-An Tian
- School of Physics and Microelectronics Science, Hunan University, Changsha, 410082, China
| | - Yun-Fei Mo
- School of Physics and Microelectronics Science, Hunan University, Changsha, 410082, China
| | - Hai-Tao Zhang
- School of Physics and Microelectronics Science, Hunan University, Changsha, 410082, China.,Department of electronic and communication engineering, Changsha University, Changsha, 410003, China
| | - Hai-Rong Liu
- College of Materials Science and Engineering, Hunan University, Changsha, 410082, China
| | - Zhao-Yang Hou
- Department of Applied Physics, Changan University, Xi'an, 710064, China
| | - Li-Li Zhou
- Department of Information Engineering, Gannan Medical University, Ganzhou, 341000, China
| | - Ping Peng
- College of Materials Science and Engineering, Hunan University, Changsha, 410082, China
| |
Collapse
|
31
|
De Souza DG, Cezar HM, Rondina GG, de Oliveira MF, Da Silva JLF. A basin-hopping Monte Carlo investigation of the structural and energetic properties of 55- and 561-atom bimetallic nanoclusters: the examples of the ZrCu, ZrAl, and CuAl systems. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:175302. [PMID: 27045947 DOI: 10.1088/0953-8984/28/17/175302] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We report a basin-hopping Monte Carlo investigation within the embedded-atom method of the structural and energetic properties of bimetallic ZrCu, ZrAl, and CuAl nanoclusters with 55 and 561 atoms. We found that unary Zr55, Zr561, Cu55, Cu561, Al55, and Al561 systems adopt the well known compact icosahedron (ICO) structure. The excess energy is negative for all systems and compositions, which indicates an energetic preference for the mixing of both chemical species. The ICO structure is preserved if a few atoms of the host system are replaced by different species, however, the composition limit in which the ICO structure is preserved depends on both the host and new chemical species. Using several structural analyses, three classes of structures, namely ideal ICO, nearly ICO, and distorted ICO structures, were identified. As the amounts of both chemical species change towards a more balanced composition, configurations far from the ICO structure arise and the dominant structures are nearly spherical, which indicates a strong minimization of the surface energy by decreasing the number of atoms with lower coordination on the surface. The average bond lengths follow Vegard's law almost exactly for ZrCu and ZrAl, however, this is not the case for CuAl. Furthermore, the radial distribution allowed us to identify the presence of an onion-like behavior in the surface of the 561-atom CuAl nanocluster with the Al atoms located in the outermost surface shell, which can be explained by the lower surface energies of the Al surfaces compared with the Cu surfaces. In ZrCu and ZrAl the radial distribution indicates a nearly homogeneous distribution for the chemical species, however, with a slightly higher concentration of Al atoms on the ZrAl surface, which can also be explained by the lower surface energy.
Collapse
Affiliation(s)
- Douglas G De Souza
- Department of Materials Engineering, São Carlos School of Engineering, University of São Paulo, PO Box 1100, 13563-120, São Carlos, SP, Brazil
| | | | | | | | | |
Collapse
|
32
|
Ag–M (M: Ni, Co, Cu, Fe) bimetal catalysts prepared by galvanic deposition method for CO oxidation. Catal Today 2016. [DOI: 10.1016/j.cattod.2015.11.043] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
33
|
Bochicchio D, Ferrando R, Panizon E, Rossi G. Structures and segregation patterns of Ag-Cu and Ag-Ni nanoalloys adsorbed on MgO(0 0 1). JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:064005. [PMID: 26795034 DOI: 10.1088/0953-8984/28/6/064005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Low-energy geometric structures and segregation patterns of Ag-Cu and Ag-Ni nanoparticles adsorbed on MgO(0 0 1) are searched for by global optimisation methods within an atomistic potential model. Sizes betwen 100 and 300 atoms are considered for several compositions. In all cases, Ag segregates to the nanoparticle surface, so that Cu@Ag and Ni@Ag core-shell arrangements are found, with off-centre cores for Ag-rich compositions. The behaviours of Ag-Cu and Ag-Ni differ at the interface with the MgO substrate. For Ag-Cu, some Cu atoms are at the interface even for compositions that are very rich in Ag, where Ag-Ni nanoparticles present an interface completely made of Ag atoms. Ag-Ni and Ag-Cu also differ concerning their geometric structures. With increasing Ag content, in Ag-Cu we find the structural sequence faulted fcc [Formula: see text] icosahedral [Formula: see text] fcc, while in Ag-Ni we find the sequence hcp [Formula: see text] faulted fcc-faulted hcp [Formula: see text] icosahedral [Formula: see text] fcc.
Collapse
Affiliation(s)
- Davide Bochicchio
- Dipartimento di Fisica dell'Università di Genova, Via Dodecaneso 33, 16146 Genoa, Italy
| | | | | | | |
Collapse
|
34
|
Marks LD, Peng L. Nanoparticle shape, thermodynamics and kinetics. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:053001. [PMID: 26792459 DOI: 10.1088/0953-8984/28/5/053001] [Citation(s) in RCA: 99] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Nanoparticles can be beautiful, as in stained glass windows, or they can be ugly as in wear and corrosion debris from implants. We estimate that there will be about 70,000 papers in 2015 with nanoparticles as a keyword, but only one in thirteen uses the nanoparticle shape as an additional keyword and research focus, and only one in two hundred has thermodynamics. Methods for synthesizing nanoparticles have exploded over the last decade, but our understanding of how and why they take their forms has not progressed as fast. This topical review attempts to take a critical snapshot of the current understanding, focusing more on methods to predict than a purely synthetic or descriptive approach. We look at models and themes which are largely independent of the exact synthetic method whether it is deposition, gas-phase condensation, solution based or hydrothermal synthesis. Elements are old dating back to the beginning of the 20th century-some of the pioneering models developed then are still relevant today. Others are newer, a merging of older concepts such as kinetic-Wulff constructions with methods to understand minimum energy shapes for particles with twins. Overall we find that while there are still many unknowns, the broad framework of understanding and predicting the structure of nanoparticles via diverse Wulff constructions, either thermodynamic, local minima or kinetic has been exceedingly successful. However, the field is still developing and there remain many unknowns and new avenues for research, a few of these being suggested towards the end of the review.
Collapse
Affiliation(s)
- L D Marks
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
| | | |
Collapse
|
35
|
Marbella LE, Chevrier DM, Tancini PD, Shobayo O, Smith AM, Johnston KA, Andolina CM, Zhang P, Mpourmpakis G, Millstone JE. Description and Role of Bimetallic Prenucleation Species in the Formation of Small Nanoparticle Alloys. J Am Chem Soc 2015; 137:15852-8. [PMID: 26670347 DOI: 10.1021/jacs.5b10124] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
We report the identification, description, and role of multinuclear metal-thiolate complexes in aqueous Au-Cu nanoparticle syntheses. The structure of these species was characterized by nuclear magnetic resonance spectroscopy, mass spectrometry, X-ray photoelectron spectroscopy, and X-ray absorption spectroscopy techniques. The observed structures were found to be in good agreement with thermodynamic growth trends predicted by first-principles calculations. The presence of metal-thiolate complexes is then shown to be critical for the formation of alloyed Au-Cu architectures in the small nanoparticle regime (diameter ∼2 nm). In the absence of mixed metal-thiolate precursors, nanoparticles form with a Cu-S shell and a Au-rich interior. Taken together, these results demonstrate that prenucleation species, which are discrete molecular precursors distinct from both initial reagents and final particle products, may provide an important new synthetic route to control final metal nanoparticle composition and composition architectures.
Collapse
Affiliation(s)
| | - Daniel M Chevrier
- Department of Chemistry, Dalhousie University , Halifax, NS B3H 4J3, Canada
| | | | | | | | | | | | - Peng Zhang
- Department of Chemistry, Dalhousie University , Halifax, NS B3H 4J3, Canada
| | | | | |
Collapse
|
36
|
Perez D, Cubuk ED, Waterland A, Kaxiras E, Voter AF. Long-Time Dynamics through Parallel Trajectory Splicing. J Chem Theory Comput 2015; 12:18-28. [PMID: 26605853 DOI: 10.1021/acs.jctc.5b00916] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Simulating the atomistic evolution of materials over long time scales is a longstanding challenge, especially for complex systems where the distribution of barrier heights is very heterogeneous. Such systems are difficult to investigate using conventional long-time scale techniques, and the fact that they tend to remain trapped in small regions of configuration space for extended periods of time strongly limits the physical insights gained from short simulations. We introduce a novel simulation technique, Parallel Trajectory Splicing (ParSplice), that aims at addressing this problem through the timewise parallelization of long trajectories. The computational efficiency of ParSplice stems from a speculation strategy whereby predictions of the future evolution of the system are leveraged to increase the amount of work that can be concurrently performed at any one time, hence improving the scalability of the method. ParSplice is also able to accurately account for, and potentially reuse, a substantial fraction of the computational work invested in the simulation. We validate the method on a simple Ag surface system and demonstrate substantial increases in efficiency compared to previous methods. We then demonstrate the power of ParSplice through the study of topology changes in Ag42Cu13 core-shell nanoparticles.
Collapse
Affiliation(s)
- Danny Perez
- Theoretical Division T-1, Los Alamos National Laboratory , P.O. Box 1663, Los Alamos, New Mexico 87544, United States
| | - Ekin D Cubuk
- Department of Physics and School of Engineering and Applied Sciences, Harvard University , Cambridge, Massachusetts 02138, United States
| | - Amos Waterland
- Department of Physics and School of Engineering and Applied Sciences, Harvard University , Cambridge, Massachusetts 02138, United States
| | - Efthimios Kaxiras
- Department of Physics and School of Engineering and Applied Sciences, Harvard University , Cambridge, Massachusetts 02138, United States
| | - Arthur F Voter
- Theoretical Division T-1, Los Alamos National Laboratory , P.O. Box 1663, Los Alamos, New Mexico 87544, United States
| |
Collapse
|
37
|
Chaves AS, Piotrowski MJ, Guedes-Sobrinho D, Da Silva JLF. Theoretical Investigation of the Adsorption Properties of CO, NO, and OH on Monometallic and Bimetallic 13-Atom Clusters: The Example of Cu13, Pt7Cu6, and Pt13. J Phys Chem A 2015; 119:11565-73. [DOI: 10.1021/acs.jpca.5b08330] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anderson S. Chaves
- São
Carlos Institute of Chemistry, University of São Paulo, P.O. Box 780, 13560-970, São Carlos, SP, Brazil
| | - Maurício J. Piotrowski
- Physics
Department, Federal University of Pelotas, P.O. Box 354, 96010-900, Pelotas, RS, Brazil
| | - Diego Guedes-Sobrinho
- São
Carlos Institute of Chemistry, University of São Paulo, P.O. Box 780, 13560-970, São Carlos, SP, Brazil
| | - Juarez L. F. Da Silva
- São
Carlos Institute of Chemistry, University of São Paulo, P.O. Box 780, 13560-970, São Carlos, SP, Brazil
| |
Collapse
|