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Wang P, Xiao B, Zhao R, Ma Y, Zhang M. Structure-Dependent Spin Polarization in Polymorphic CdS:Y Semiconductor Nanocrystals. ACS APPLIED MATERIALS & INTERFACES 2016; 8:6656-6661. [PMID: 26905093 DOI: 10.1021/acsami.5b12542] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Searching for the polymorphic semiconductor nanocrystals would provide precise and insightful structure-spin polarization correlations and meaningful guidance for designing and synthesizing high spin-polarized spintronic materials. Herein, the high spin polarization is achieved in polymorphic CdS:Y semiconductor nanocrystals. The high-pressure polymorph of rock-salt CdS:Y nanocrystals has been recovered at ambient conditions synthesized by the wurtzite CdS:Y nanocrystals as starting material under 5.2 GPa and 300 °C conditions. The rock-salt CdS:Y polymorph displays more robust room-temperature ferromagnetism than wurtzite sample, which can reach the ferromagnetic level of conventional semiconductors doped with magnetic transition-metal ions, mainly due to the significantly enhanced spin configuration and defect states. Therefore, crystal structure directly governs the spin configuration, which determines the degree of spin polarization. This work can provide experimental and theoretical methods for designing the high spin-polarized semiconductor nanocrystals, which is important for applications in semiconductor spintronics.
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Affiliation(s)
- Pan Wang
- State Key Laboratory of Superhard Materials, Jilin University , Changchun 130012, China
| | - Bingxin Xiao
- State Key Laboratory of Superhard Materials, Jilin University , Changchun 130012, China
| | - Rui Zhao
- State Key Laboratory of Superhard Materials, Jilin University , Changchun 130012, China
| | - Yanzhang Ma
- Department of Mechanical Engineering, Texas Tech University , Lubbock, Texas 79409, United States
| | - Mingzhe Zhang
- State Key Laboratory of Superhard Materials, Jilin University , Changchun 130012, China
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Zhao R, Wang P, Yao BB, Hu TT, Yang TY, Xiao BX, Wang SM, Xiao CH, Zhang MZ. Co effect on zinc blende–rocksalt phase transition in CdS nanocrystals. RSC Adv 2015. [DOI: 10.1039/c4ra14798g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The Co dopant significantly promotes the zinc blende to rocksalt phase transition and increases the bulk modulus compared with CdS nanocrystals.
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Affiliation(s)
- Rui Zhao
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun
- People's Republic of China
- College of Computer
| | - Pan Wang
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun
- People's Republic of China
| | - Bin-bin Yao
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun
- People's Republic of China
| | - Ting-ting Hu
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun
- People's Republic of China
| | - Tian-ye Yang
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun
- People's Republic of China
| | - Bing-xin Xiao
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun
- People's Republic of China
| | - Shuang-ming Wang
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun
- People's Republic of China
| | - Chuan-hai Xiao
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun
- People's Republic of China
| | - Ming-zhe Zhang
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun
- People's Republic of China
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Xiao J, Wen B, Melnik R, Kawazoe Y, Zhang X. Phase transformation of cadmium sulfide under high temperature and high pressure conditions. Phys Chem Chem Phys 2014; 16:14899-904. [PMID: 24930763 DOI: 10.1039/c4cp01003e] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cadmium sulfide (CdS) is one of the most significant wide band gap semiconductors, and knowledge of the phase transformation of CdS under high temperature and pressure is especially important for its applications. The pressure-temperature phase diagram and the phase transformation pathways of CdS have been investigated by using density functional theory combined with quasiharmonic approximation. Our results indicated that under ambient conditions, wz-CdS is a stable phase, while under high temperature and pressure, rs-CdS becomes the stable phase. It is also found that zb-CdS is an intermediate phase in transforming from rs-CdS to wz-CdS. Therefore, although there are no zb-CdS phase regions in the CdS pressure-temperature phase diagram, zb-CdS can be found in some prepared experiments.
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Affiliation(s)
- Jianwei Xiao
- State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China.
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Grünwald M, Zayak A, Neaton JB, Geissler PL, Rabani E. Transferable pair potentials for CdS and ZnS crystals. J Chem Phys 2012; 136:234111. [PMID: 22779585 DOI: 10.1063/1.4729468] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A set of interatomic pair potentials is developed for CdS and ZnS crystals. We show that a simple energy function, which has been used to describe the properties of CdSe [E. Rabani, J. Chem. Phys. 116, 258 (2002)], can be parametrized to accurately describe the lattice and elastic constants, and phonon dispersion relations of bulk CdS and ZnS in the wurtzite and rocksalt crystal structures. The predicted coexistence pressure of the wurtzite and rocksalt structures as well as the equation of state are in good agreement with experimental observations. These new pair potentials enable the study of a wide range of processes in bulk and nanocrystalline II-VI semiconductor materials.
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Affiliation(s)
- Michael Grünwald
- Department of Chemistry, University of California, Berkeley, California 94720, USA
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Zhao XS, Schroeder J, Persans PD, Lu E. A Study of the Pressure-Induced Phase Transition in Bulk and Nanocrystalline Cadmium Sulfide. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-164-93] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractWe have used Resonant Raman scattering induced by pressure tuning to study the phase transition and electronic states of bulk and 60±20 Å colloidal microcrystallite CdS. The experimental results show that bulk CdS undergoes a well-defined first order phase transition at 27 kbar and that the intensity of the Raman scattering increases sharply when the level of the intermediate state (bound exciton I2) is close to the photon energy. After the phase transition no Raman scattering and photoluminescence can be observed. However, the phase transition in the colloidal CdS is quite different from the bulk CdS and the complete phase transition occurs above 60 kbar. Both bulk and colloidal CdS reverse to the original wurtzite phase after releasing the pressure.
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Fernández EJ, Jones PG, Laguna A, López-de-Luzuriaga JM, Monge M, Olmos ME, Puelles RC. Perhalophenyl(tetrahydrothiophene)gold(I) Complexes as Lewis Bases in Acid−Base Reactions with Silver Trifluoroacetate. Organometallics 2007. [DOI: 10.1021/om700701m] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Eduardo J. Fernández
- Departamento de Química, Universidad de la Rioja, Grupo de Síntesis Química de La Rioja, UA-CSIC, Complejo Científico Tecnológico, 26006 Logroño, Spain, Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain, and Institut für Anorganische und Analytische Chemie der Technischen Universität, Postfach 3329, D-38023 Braunschweig, Germany
| | - Peter G. Jones
- Departamento de Química, Universidad de la Rioja, Grupo de Síntesis Química de La Rioja, UA-CSIC, Complejo Científico Tecnológico, 26006 Logroño, Spain, Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain, and Institut für Anorganische und Analytische Chemie der Technischen Universität, Postfach 3329, D-38023 Braunschweig, Germany
| | - Antonio Laguna
- Departamento de Química, Universidad de la Rioja, Grupo de Síntesis Química de La Rioja, UA-CSIC, Complejo Científico Tecnológico, 26006 Logroño, Spain, Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain, and Institut für Anorganische und Analytische Chemie der Technischen Universität, Postfach 3329, D-38023 Braunschweig, Germany
| | - José M. López-de-Luzuriaga
- Departamento de Química, Universidad de la Rioja, Grupo de Síntesis Química de La Rioja, UA-CSIC, Complejo Científico Tecnológico, 26006 Logroño, Spain, Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain, and Institut für Anorganische und Analytische Chemie der Technischen Universität, Postfach 3329, D-38023 Braunschweig, Germany
| | - Miguel Monge
- Departamento de Química, Universidad de la Rioja, Grupo de Síntesis Química de La Rioja, UA-CSIC, Complejo Científico Tecnológico, 26006 Logroño, Spain, Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain, and Institut für Anorganische und Analytische Chemie der Technischen Universität, Postfach 3329, D-38023 Braunschweig, Germany
| | - M. Elena Olmos
- Departamento de Química, Universidad de la Rioja, Grupo de Síntesis Química de La Rioja, UA-CSIC, Complejo Científico Tecnológico, 26006 Logroño, Spain, Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain, and Institut für Anorganische und Analytische Chemie der Technischen Universität, Postfach 3329, D-38023 Braunschweig, Germany
| | - Raquel C. Puelles
- Departamento de Química, Universidad de la Rioja, Grupo de Síntesis Química de La Rioja, UA-CSIC, Complejo Científico Tecnológico, 26006 Logroño, Spain, Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain, and Institut für Anorganische und Analytische Chemie der Technischen Universität, Postfach 3329, D-38023 Braunschweig, Germany
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Kozhevnikova NS, Rempel AA, Hergert F, Magerl A. A study of cadmium sulfide nanocrystalline films by grazing incidence X-ray diffraction. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2007. [DOI: 10.1134/s0036024407050202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Morgan BJ, Madden PA. Simulation of the pressure-driven wurtzite to rock salt phase transition in nanocrystals. Phys Chem Chem Phys 2006; 8:3304-13. [PMID: 16835678 DOI: 10.1039/b604390a] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nanocrystals in the size range 12-21 nm of a model binary ionic material in the wurtzite (B4) structure were constructed with morphologies which minimize the surface energy. These were then embedded in a pressurization medium, consisting of a binary Lennard-Jones-type fluid and progressively pressurized in "constant pressure" molecular dynamics simulation runs. Phase transitions to the rocksalt (B1) phase were confirmed by examining calculated powder diffraction patterns, which show the same changes in features as seen for experimental systems. By directly observing the atomic trajectories throughout the duration of the transition the local mechanism has been identified. The transition proceeds via a trigonal bipyramidal intermediate, denoted as the h-MgO structure. It is initiated by a single nucleation event at a [1120]B4 surface with subsequent growth of the B1 region throughout the remainder of the nanocrystal. The consequences of this mechanism for the particle shape of the product phase are detailed and contrasted with those previously found for initially zincblende (B3) structured nanoparticles, using the same interaction potential. The observed transition pressures are elevated relative to the thermodynamically predicted pressure for the bulk, but there is no observable system size effect on the transition pressure across the size range of nanocrystals investigated.
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Affiliation(s)
- Benjamin J Morgan
- School of Chemistry, Trinity College, University of Dublin, Dublin 2, Ireland.
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Corban GJ, Antoniadis C, Hadjikakou SK, Hadjiliadis N, Meng JF, Butler IS. Pressure-tuning Raman spectra of diiodine thioamide compounds: models for antithyroid drug activity. Bioinorg Chem Appl 2006; 2006:68542. [PMID: 17497015 PMCID: PMC1794079 DOI: 10.1155/bca/2006/68542] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2006] [Revised: 07/05/2006] [Accepted: 07/26/2006] [Indexed: 01/12/2023] Open
Abstract
The pressure-tuning Raman spectra of five solid, diiodine heterocyclic thioamide compounds (mbztS)I(2) (mbztS = N-methyl-2-mercaptobenzothiazole) (1); [(mbztS)(2)I](+)[I(7)](-) (2); (pySH)I(2) (pySH = 2-mercaptopyridine) (3); [(pySH)(pyS](+)[I(3)](-) (4); (thpm)(I(2))(2) or possibly [(thpm)I(2)](+)[I(3)](-) (thpm = 2-mercapto-3,4,5,6-tertahydropyrimidine (5) have been measured for pressures up to approximately 50 kbar using a diamond-anvil cell. Compounds 1, 4, and 5 undergo pressure-induced phase transitions at approximately 35, approximately 25, and approximately 32 kbar, respectively. Following the phase transition in 1, the pressure dependences of the vibrational modes, which were originally located at 84, 111, and 161 cm(-1) and are associated with the S(cdots, three dots, centered)I-I linkage, are 2.08, 1.78, and 0.57 cm(-1)/kbar, respectively. These pressure dependences are typical of low-energy vibrations. The pressure-tuning FT-Raman results for the pairs of compounds 1 , 2, 3, and 4 are remarkably similar to each other suggesting that the compounds are most probably perturbed diiodide compounds rather than ionic ones. The Raman data for 5 show that it is best formulated as (thpm)(I(2))(2) rather than [(thpm)(2)I](+)[I(3)](-).
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Affiliation(s)
- Ghada J. Corban
- Inorganic and Analytical Chemistry Section, Department of Chemistry, University of Ioannina, Ioannina 45110, Greece
| | - Constantinos Antoniadis
- Inorganic and Analytical Chemistry Section, Department of Chemistry, University of Ioannina, Ioannina 45110, Greece
| | - Sotiris K. Hadjikakou
- Inorganic and Analytical Chemistry Section, Department of Chemistry, University of Ioannina, Ioannina 45110, Greece
| | - Nick Hadjiliadis
- Inorganic and Analytical Chemistry Section, Department of Chemistry, University of Ioannina, Ioannina 45110, Greece
| | - Jin-Fang Meng
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC, Canada H3A 2K6
| | - Ian S. Butler
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC, Canada H3A 2K6
- *Ian S. Butler:
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dos Santos JHZ, Butler IS, Daga V, Hadjikakou S, Hadjiliadis N. High-pressure Fourier transform micro-Raman spectroscopic investigation of diiodine-heterocyclic thioamide adducts. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2002; 58:2725-2735. [PMID: 12396055 DOI: 10.1016/s1386-1425(02)00028-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The pressure dependences of the Fourier transform micro-Raman spectra of four heterocyclic thioamides [[(bztzdtH)I2] x I2] (1) (bztzdtH = benzothiazole-2-thione), [(bztzdtH)I2] (2), [[(tzdtH)2I+] x I3- x 2I2] (3) (tzdtH = thiazoline-2-thione), and [[(bzimtH)I2]2 x I2 x 2H2O] (4) (bzimtH = benzimidazole-2-thione) have been studied between ambient pressure and 50 kbar. For 1, generation of I3- ions through disproportionation reactions is evident as the pressure is increased. There are empirical linear correlations between the frequency and (I-I) bond length and the applied pressure. The iodine adduct of thioamide 2 is more sensitive to pressure when compared to the 1 or 4 iodine adducts. This difference in behavior may be attributed to differences in crystal structures or to a lower I-I bond order. Monitoring of other vibrational transitions of the thiomide structure reveals several less important pressure dependences.
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Cervantes P, Williams Q, Côté M, Zakharov O, Cohen ML. Band structure of CdS and CdSe at high pressure. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:17585-17590. [PMID: 9985883 DOI: 10.1103/physrevb.54.17585] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Mang A, Reimann K, Rübenacke S, Steube M. Two-photon spectroscopy study of ZnS and CdS under hydrostatic pressure. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:16283-16288. [PMID: 9983464 DOI: 10.1103/physrevb.53.16283] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Silvestri MR, Schroeder J. Pressure- and laser-tuned Raman scattering in II-VI semiconductor nanocrystals: Electron-phonon coupling. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:15108-15112. [PMID: 9975861 DOI: 10.1103/physrevb.50.15108] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Zhao XS, Schroeder J, Persans PD, Bilodeau TG. Resonant-Raman-scattering and photoluminescence studies in glass-composite and colloidal CdS. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 43:12580-12589. [PMID: 9997060 DOI: 10.1103/physrevb.43.12580] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Ves S, Schwarz U, Christensen NE, Syassen K, Cardona M. Cubic ZnS under pressure: Optical-absorption edge, phase transition, and calculated equation of state. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:9113-9118. [PMID: 9995127 DOI: 10.1103/physrevb.42.9113] [Citation(s) in RCA: 202] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Béliveau A, Carlone C. Pressure coefficient of the direct band gap of the solid solution ZnxCd1-xS. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 41:9860-9864. [PMID: 9993366 DOI: 10.1103/physrevb.41.9860] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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