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Zavala-Sanchez LA, Hirata GA, Novitskaya E, Karandikar K, Herrera M, Graeve OA. Distribution of Eu2+ and Eu3+ Ions in Hydroxyapatite: A Cathodoluminescence and Raman Study. ACS Biomater Sci Eng 2015; 1:1306-1313. [DOI: 10.1021/acsbiomaterials.5b00378] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Luz A. Zavala-Sanchez
- Centro
de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Km 107 Carretera Tijuana-Ensenada, Ensenada, Baja California C.P. 22800, Mexico
| | - Gustavo A. Hirata
- Centro
de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Km 107 Carretera Tijuana-Ensenada, Ensenada, Baja California C.P. 22800, Mexico
| | - Ekaterina Novitskaya
- Department
of Mechanical and Aerospace Engineering, University of California, San Diego, 9500 Gilman Drive, MC 0411, La Jolla, California 92093-0411, United States
| | - Keyur Karandikar
- Department
of Mechanical and Aerospace Engineering, University of California, San Diego, 9500 Gilman Drive, MC 0411, La Jolla, California 92093-0411, United States
| | - Manuel Herrera
- Centro
de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Km 107 Carretera Tijuana-Ensenada, Ensenada, Baja California C.P. 22800, Mexico
| | - Olivia A. Graeve
- Centro
de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Km 107 Carretera Tijuana-Ensenada, Ensenada, Baja California C.P. 22800, Mexico
- Department
of Mechanical and Aerospace Engineering, University of California, San Diego, 9500 Gilman Drive, MC 0411, La Jolla, California 92093-0411, United States
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Kumar Y, Herrera-Zaldivar M, Olive-Méndez SF, Singh F, Mathew X, Agarwal V. Modification of optical and electrical properties of zinc oxide-coated porous silicon nanostructures induced by swift heavy ion. NANOSCALE RESEARCH LETTERS 2012; 7:366. [PMID: 22748164 PMCID: PMC3432626 DOI: 10.1186/1556-276x-7-366] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2012] [Accepted: 07/02/2012] [Indexed: 06/01/2023]
Abstract
Morphological and optical characteristics of radio frequency-sputtered zinc aluminum oxide over porous silicon (PS) substrates were studied before and after irradiating composite films with 130 MeV of nickel ions at different fluences varying from 1 × 1012 to 3 × 1013 ions/cm2. The effect of irradiation on the composite structure was investigated by scanning electron microscopy, X-ray diffraction (XRD), photoluminescence (PL), and cathodoluminescence spectroscopy. Current-voltage characteristics of ZnO-PS heterojunctions were also measured. As compared to the granular crystallites of zinc oxide layer, Al-doped zinc oxide (ZnO) layer showed a flaky structure. The PL spectrum of the pristine composite structure consists of the emission from the ZnO layer as well as the near-infrared emission from the PS substrate. Due to an increase in the number of deep-level defects, possibly oxygen vacancies after swift ion irradiation, PS-Al-doped ZnO nanocomposites formed with high-porosity PS are shown to demonstrate a broadening in the PL emission band, leading to the white light emission. The broadening effect is found to increase with an increase in the ion fluence and porosity. XRD study revealed the relative resistance of the film against the irradiation, i.e., the irradiation of the structure failed to completely amorphize the structure, suggesting its possible application in optoelectronics and sensing applications under harsh radiation conditions.
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Affiliation(s)
- Yogesh Kumar
- Centro de Investigacion en Ingenieria y Ciencias Aplicadas, UAEM, Av. Univ. 1001, Col. Chamilpa, Cuernavaca, Morelos, 62209, México
- Centro de Investigacion in Materiales Avanzados, Ave. Miguel de Cervantes 120, Complejo Industrial Chihuahua, Chihuahua, 31109, México
| | - Manuel Herrera-Zaldivar
- Materials Science Group, Centro de Nanociencia y Nanotecnología, UNAM, Ensenada Apdo, Postal 14, Ensenada, Baja California, 22800, México
| | - Sion Federico Olive-Méndez
- Centro de Investigacion in Materiales Avanzados, Ave. Miguel de Cervantes 120, Complejo Industrial Chihuahua, Chihuahua, 31109, México
| | - Fouran Singh
- Inter University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Xavier Mathew
- Centro de Investigacion Energia, UNAM, Privada Xochicalco S/N, Temixco, Morelos, 62580, México
| | - Vivechana Agarwal
- Centro de Investigacion en Ingenieria y Ciencias Aplicadas, UAEM, Av. Univ. 1001, Col. Chamilpa, Cuernavaca, Morelos, 62209, México
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