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Optical properties of GaAs nanocrystals: influence of an electric field. J Mol Model 2013; 19:2273-83. [PMID: 23377958 DOI: 10.1007/s00894-013-1753-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Accepted: 01/02/2013] [Indexed: 10/27/2022]
Abstract
A study of the electronic and optical properties of the hydrogen-terminated GaAs nanocrystals Ga₆₈As₆₈H₉₆ and Ga₉₂As₈₀H₁₀₈ is presented. In this study, their dielectric functions, refractive indices, and absorption coefficients were calculated using density functional theory (DFT). The influence of a uniform external electric field on the optical properties of the nanocrystals was also explored. The highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) for each nanocrystal were studied in the absence and the presence of the uniform external electric field. Our results indicate that the HOMO-LUMO gap decreases with increasing electric field strength. The calculated density of states revealed that the main reason for this shrinking gap is an increase in the delocalization of the gallium π-orbitals under the influence of an increasing external electric field. The permanent dipole moment and the polarizability of the nanocrystals under the induced electric field increased with increasing nanocrystal radius. The induced electric field caused a noticeable redshift in the absorption peaks. The electric field also increased the absorption intensity, particularly when the field strength was >0.25 V/Å.
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Ueno LT, Lopes C, Malaspina T, Roberto-Neto O, Canuto S, Machado FB. Theoretical study of the XP3 (X=Al, B, Ga) clusters. Chem Phys 2012. [DOI: 10.1016/j.chemphys.2011.06.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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CAO ZHIJI, BALASUBRAMANIAN KRISHNAN. GEOMETRIES AND ENERGY SEPARATIONS OF ELECTRONIC STATES OF In3N, InN3, AND THEIR IONS. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2011. [DOI: 10.1142/s0219633608004106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Spectroscopic properties of the low-lying electronic states of In 3 N , InN 3, and their ions are computed by the complete active-space self-consistent field (CASSCF) followed by multireference singles + doubles configuration interaction (MRSDCI) calculations. Our results predict that the spectra of In 3 N / InN 3 are substantially different from those of Ga 3 As / GaAs 3 and Al 3 P / AlP 3 tetramers. The ground state of In 3 N is a closed-shell 1 A ′1 state with a planar D 3h symmetry, whereas the ground state of InN 3 is a 1Σ+ state of linear In – N – N – N structure. The equilibrium geometries, vibrational frequencies, atomization energies, adiabatic ionization potentials, electron affinities, and other properties are discussed.
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Affiliation(s)
- ZHIJI CAO
- Department of Mathematics and Computer Science, California State University, East Bay, Hayward, CA, USA
| | - KRISHNAN BALASUBRAMANIAN
- Department of Mathematics and Computer Science, California State University, East Bay, Hayward, CA, USA
- Chemistry and Material Science Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, USA
- Glenn T Seaborg Center, Lawrence Berkeley Laboratory, University of California, Berkeley, CA 94720, USA
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Karamanis P, Pouchan C, Leszczynski J. Electric Dipole (Hyper)polarizabilities of Selected X2Y2 and X3Y3 (X = Al, Ga, In and Y = P, As): III−V Semiconductor Clusters. An ab Initio Comparative Study. J Phys Chem A 2008; 112:13662-71. [DOI: 10.1021/jp8071603] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Panaghiotis Karamanis
- Department of Chemistry, Jackson State University, 1400 J. R. Lynch Street, P.O. Box 17910, Jackson, Mississippi 39217, and Groupe de Chimie Théorique et Réactivité, ECP, IPREM UMR 5254, Université de Pau et de Pays de l’Adour, 64075 Pau Cedex, France
| | - Claude Pouchan
- Department of Chemistry, Jackson State University, 1400 J. R. Lynch Street, P.O. Box 17910, Jackson, Mississippi 39217, and Groupe de Chimie Théorique et Réactivité, ECP, IPREM UMR 5254, Université de Pau et de Pays de l’Adour, 64075 Pau Cedex, France
| | - Jerzy Leszczynski
- Department of Chemistry, Jackson State University, 1400 J. R. Lynch Street, P.O. Box 17910, Jackson, Mississippi 39217, and Groupe de Chimie Théorique et Réactivité, ECP, IPREM UMR 5254, Université de Pau et de Pays de l’Adour, 64075 Pau Cedex, France
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Gutsev GL, O’Neal, Jr. RH, Saha BC, Mochena MD, Johnson E, Bauschlicher, Jr. CW. Optical Properties of (GaAs)n Clusters (n = 2−16). J Phys Chem A 2008; 112:10728-35. [DOI: 10.1021/jp803888k] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- G. L. Gutsev
- Department of Physics, Florida A&M University, Tallahassee, Florida 32307, Environmental Sciences Institute, Florida A & M University, Tallahassee, Florida 32307, and NASA Ames Research Center, Moffett Field, California 94035
| | - R. H. O’Neal, Jr.
- Department of Physics, Florida A&M University, Tallahassee, Florida 32307, Environmental Sciences Institute, Florida A & M University, Tallahassee, Florida 32307, and NASA Ames Research Center, Moffett Field, California 94035
| | - B. C. Saha
- Department of Physics, Florida A&M University, Tallahassee, Florida 32307, Environmental Sciences Institute, Florida A & M University, Tallahassee, Florida 32307, and NASA Ames Research Center, Moffett Field, California 94035
| | - M. D. Mochena
- Department of Physics, Florida A&M University, Tallahassee, Florida 32307, Environmental Sciences Institute, Florida A & M University, Tallahassee, Florida 32307, and NASA Ames Research Center, Moffett Field, California 94035
| | - E. Johnson
- Department of Physics, Florida A&M University, Tallahassee, Florida 32307, Environmental Sciences Institute, Florida A & M University, Tallahassee, Florida 32307, and NASA Ames Research Center, Moffett Field, California 94035
| | - C. W. Bauschlicher, Jr.
- Department of Physics, Florida A&M University, Tallahassee, Florida 32307, Environmental Sciences Institute, Florida A & M University, Tallahassee, Florida 32307, and NASA Ames Research Center, Moffett Field, California 94035
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Gutsev GL, Johnson E, Mochena MD, Bauschlicher CW. The structure and energetics of (GaAs)n, (GaAs)n−, and (GaAs)n+ (n=2–15). J Chem Phys 2008; 128:144707. [DOI: 10.1063/1.2884860] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Li Z, Zhao C, Chen L. Structure and aromaticity of , Bi5M (M=Li, Na, K) and Bi5M+ (M=Be, Mg, Ca) clusters. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.theochem.2007.12.032] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Karamanis P, Bégué D, Pouchan C. Ab initiofinite field (hyper)polarizability computations on stoichiometric gallium arsenide clusters GanAsn (n=2–9). J Chem Phys 2007; 127:094706. [PMID: 17824758 DOI: 10.1063/1.2768365] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We report reliable ab initio finite field (hyper)polarizability values at Hartree-Fock and second order Moller-Plesset perturbation theory (MP2) levels of theory for different geometrical configurations of small gallium arsenide clusters Ga(n)As(n) with n=2-5. We relied on all-electron basis sets and pseudopotentials suitable for (hyper)polarizability calculations. In each case, we used structures that have been established in the literature after we optimized their geometries at B3LYP/cc-pVTZ-PP level of theory. Our results suggest that the first order hyperpolarizability (beta) is much more sensitive to the special geometric features than the second order hyperpolarizability (gamma). For the most stable configurations up to ten atoms the second order hyperpolarizability at MP2 level of theory varies between 15 x 10(4) and 32 x 10(4) e(4)a0 (4)Eh(-3). In addition, we examined the polarizability per atom evolution versus the cluster size for Ga(n)As(n) with n=2-9. Our work extends earlier theoretical studies which were limited to eight atoms and exposes that the polarizability/atom of the most stable stoichiometric configurations up to Ga(9)As(9) continues the monotonic downward trend with increasing size. Lastly, from the methodological point of view, our analysis shows that apart from polarizabilities, augmented pseudopotentials yield reliable first and second hyperpolarizability values as well.
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Affiliation(s)
- Panaghiotis Karamanis
- Institut Pluridisciplinaire en Recherche sur l'Environnement et les Matériaux, UMR 5254 CNRS, Equipe de Chimie Physique, Groupe de Chimie Théorique, IFR, Rue Jules Ferry, BP 27540, F-64075 PAU, Cedex, France
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Maroulis G, Karamanis P, Pouchan C. Hyperpolarizability of GaAs dimer is not negative. J Chem Phys 2007; 126:154316. [PMID: 17461635 DOI: 10.1063/1.2723116] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present a systematic study of the static electric hyperpolarizability of Ga(2)As(2). The authors rely on finite-field high-level ab initio calculations with carefully optimized basis sets. Their best values for the mean and the anisotropy of the dipole polarizability are alpha=158.57 and Deltaalpha=130.33e(2)a(0) (2)E(h) (-1). For the hyperpolarizability we propose an estimate gamma=(155+/-15)x10(3)e(4)a(0) (4)E(h) (-3), which does not agree with the negative value predicted by Lan et al. [J. Chem. Phys. 124, 094302 (2006)]. Density functional theory based methods yield values close to those predicted by conventional ab initio methods. The (hyper)polarizability components are particularly enhanced along the direction defined by the Ga-Ga axis.
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Affiliation(s)
- George Maroulis
- Department of Chemistry, University of Patras, GR-26500 Patras, Greece.
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Burrill S, Grein F. Structure and bonding of III/V compounds X2Y2, with X=B, Al, Ga, and Y=N, P, As. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.theochem.2005.09.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Qu Y, Ma W, Bian X, Tang H, Tian W. Theoretical study of aluminum arsenide clusters: equilibrium geometries and electronic structures of Al(n)As(n) (n=1-4). J Mol Graph Model 2005; 24:167-74. [PMID: 16169760 DOI: 10.1016/j.jmgm.2005.07.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2005] [Revised: 07/27/2005] [Accepted: 07/31/2005] [Indexed: 11/20/2022]
Abstract
The geometry, electronic configurations, harmonic vibrational frequencies and stability of the structural isomers of Al(n)As(n) clusters (n=1-4) have been investigated using density functional theory. For dimers and trimers, the lowest energy structures are planar cumulenic rings (IIs, VIs) with D(nh) symmetry. The caged structure with T(d) symmetry (IXs) lie lowest in energy among the tetramers. The AlAs bond dominates the structures for many isomers so that one preferred dissociation channel is loss of the AlAs monomer. The atomic charges, hybridization and chemical bonding in the different structures are also discussed. Comparisons with valence-isoelectronic Si(2n), Al(n)P(n) and Ga(n)As(n) clusters of same size, the properties of the aluminum arsenide clusters are analogous to those of their corresponding Al(n)P(n), Si(2n) counterparts. The results can explain the modification and refinement of Si phase in AlSi alloy in the molecular level.
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Affiliation(s)
- Yuhui Qu
- Department of Chemistry, Shandong Institute of Light Industry, Shandong, Jinan 250100, PR China.
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Costales A, Kandalam AK, Franco R, Pandey R. Theoretical Study of Structural and Vibrational Properties of (AlP)n, (AlAs)n, (GaP)n, (GaAs)n, (InP)n, and (InAs)n Clusters with n = 1, 2, 3. J Phys Chem B 2002. [DOI: 10.1021/jp013906f] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- Aurora Costales
- Department of Physics, Michigan Technological University, Houghton, Michigan 49931
| | - Anil K. Kandalam
- Department of Physics, Michigan Technological University, Houghton, Michigan 49931
| | - Ruth Franco
- Department of Physics, Michigan Technological University, Houghton, Michigan 49931
| | - Ravindra Pandey
- Department of Physics, Michigan Technological University, Houghton, Michigan 49931
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Taylor TR, Gómez H, Asmis KR, Neumark DM. Photoelectron spectroscopy of GaX2−, Ga2X−, Ga2X2−, and Ga2X3−(X=P,As). J Chem Phys 2001. [DOI: 10.1063/1.1391267] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Cardelino BH, Moore CE, Cardelino CA, Frazier DO, Bachmann KJ. Theoretical Study of Indium Compounds of Interest for Organometallic Chemical Vapor Deposition. J Phys Chem A 2001. [DOI: 10.1021/jp0013558] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- B. H. Cardelino
- Chemistry Department, Box 238, Spelman College, Atlanta, Georgia 30314, Space Science Laboratory, NASA George C. Marshall Space Flight Center, Huntsville, Alabama 35812, School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332, and Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695
| | - C. E. Moore
- Chemistry Department, Box 238, Spelman College, Atlanta, Georgia 30314, Space Science Laboratory, NASA George C. Marshall Space Flight Center, Huntsville, Alabama 35812, School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332, and Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695
| | - C. A. Cardelino
- Chemistry Department, Box 238, Spelman College, Atlanta, Georgia 30314, Space Science Laboratory, NASA George C. Marshall Space Flight Center, Huntsville, Alabama 35812, School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332, and Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695
| | - D. O. Frazier
- Chemistry Department, Box 238, Spelman College, Atlanta, Georgia 30314, Space Science Laboratory, NASA George C. Marshall Space Flight Center, Huntsville, Alabama 35812, School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332, and Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695
| | - K. J. Bachmann
- Chemistry Department, Box 238, Spelman College, Atlanta, Georgia 30314, Space Science Laboratory, NASA George C. Marshall Space Flight Center, Huntsville, Alabama 35812, School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332, and Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695
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Igel-Mann G, Stoll H. Structure and ionization potentials of clusters containing heavy elements. Mol Phys 1995. [DOI: 10.1080/00268979500100451] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Igel-Mann G, Stoll H, Preuss H. Structure and ionization potentials of clusters containing heavy elements. Mol Phys 1993. [DOI: 10.1080/00268979300102291] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Balasubramanian K, Dai D. Group VI trimers (Se3, Te3, and Po3). Electronic states and potential energy surfaces. J Chem Phys 1993. [DOI: 10.1063/1.465992] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Balasubramanian K, Chung YS, Glaunsinger WS. Geometries and bond energies of PHn and PHn+ (n=1–3). J Chem Phys 1993. [DOI: 10.1063/1.464443] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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