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Ferreira DFS, Oliveira WD, Belo E, Gester R, Siqueira MRS, Neto AMJC, Del Nero J. Electron scattering processes in steroid molecules via NEGF-DFT: The opening of conduction channels by central oxygen. J Mol Graph Model 2020; 101:107755. [PMID: 33007576 DOI: 10.1016/j.jmgm.2020.107755] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 08/24/2020] [Accepted: 09/08/2020] [Indexed: 11/24/2022]
Abstract
We present a careful analysis of the electron transport in a variety of steroid derivatives attached among Au (111) electrodes. Our discussion is based on the non-equilibrium Green's function formalism coupled to the density functional theory, as well as appropriate parameters, such as the current-voltage behavior, differential conductance, rectification ratio, transmittance, the projected density of states, and the corresponding eigenchannels. The systems investigated present antagonistic features. While the cholesterol has no appreciable electrical rectification and works as an insulator, cortisol presents an evident diode-like behavior with an intense micro-ampere current with a strong peak at ca. 0.3 eV. This characteristic is a consequence of the systematic remotion of saturated carbon chains, and the inclusion of oxygen atoms. These results can help to understand biological processes involving these molecules besides designing new devices for applications in molecular electronics.
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Affiliation(s)
- Denner F S Ferreira
- Pós-graduação Em Engenharia Elétrica, Universidade Federal Do Pará, Belém, PA, Brazil
| | - Werbeston D Oliveira
- Curso de Engenharia Elétrica, Universidade Federal Do Amapá, Macapá, AP, Brazil; Programa de Pós-Graduação Em Propriedade Intelectual e Transferência de Tecnologia para Inovação Tecnológica, Universidade Federal Do Amapá, Macapá, AP, Brazil
| | - Ezequiel Belo
- Faculdade de Engenharia Mecânica, Campus Universitário de Tucuruí, Universidade Federal Do Pará, Tucuru, PA, Brazil
| | - Rodrigo Gester
- Faculdade de Física, Universidade Federal Do Sul e Sudeste Do Pará, Marabá, PA, Brazil
| | | | - Antônio M J C Neto
- Laboratory of Preparation and Computation of Nanomaterials (LPCN), Universidade Federal Do Pará, Belém, PA, Brazil; Faculdade de Física, Universidade Federal Do Pará, Belém, PA, Brazil
| | - Jordan Del Nero
- Faculdade de Física, Universidade Federal Do Pará, Belém, PA, Brazil
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Shedding light on the electronic structure of [Ru(η6-C16H16)(NH3)3]2+ complex: a computational insight. J Mol Model 2019; 25:11. [DOI: 10.1007/s00894-018-3882-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 11/25/2018] [Indexed: 01/19/2023]
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Galembeck SE, Caramori GF, Misturini A, Garcia LC, Orenha RP. Metal–Ligand Bonding Situation in Ruthenophanes Containing Multibridged Cyclophanes. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00393] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Sérgio E. Galembeck
- Departamento
de Química, FFCLRP, Universidade de São Paulo, Ribeirão
Preto, 14040-901 São
Paulo, Brazil
| | - Giovanni F. Caramori
- Departamento
de Química, Universidade Federal de Santa Catarina, Campus
Universitário Trindade, CP 476, Florianópolis, 88040-900 Santa Catarina, Brazil
| | - Alechania Misturini
- Departamento
de Química, Universidade Federal de Santa Catarina, Campus
Universitário Trindade, CP 476, Florianópolis, 88040-900 Santa Catarina, Brazil
| | - Leone C. Garcia
- Instituto Federal de Educação, Ciência e Tecnologia de Santa Catarina IFSC Campus, São José, 88103-310 Santa Catarina, Brazil
| | - Renato P. Orenha
- Departamento
de Química, FFCLRP, Universidade de São Paulo, Ribeirão
Preto, 14040-901 São
Paulo, Brazil
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