Desorption of O2 from a stepped platinum(113) surface during 308 nm laser irradiation |
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| Institution: | 1. Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India;2. Soft X-ray Applications Lab, Synchrotrons Utilization Section, Raja Ramanna Centre for Advanced Technology, Indore 452 013, India;3. Thin Films Lab, Synchrotrons Utilization Section, Raja Ramanna Centre for Advanced Technology, Indore 452013, India;1. Engineering Research Center of Complex Track Processing Technology & Equipment, Ministry of Education, School of Mechanical Engineering, Xiangtan University, Xiangtan, 411105, PR China;2. School of Mechanical Engineering, Jinan University, Jinan, 250022, PR China;1. Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Kafrelsheikh University, Kafrelsheikh 33516, Egypt;2. Department of NEUROFARBA, Section of Pharmaceutical and Nutraceutical Sciences, University of Florence, Polo Scientifico, Via U. Schiff 6, 50019 Sesto Fiorentino, Firenze, Italy;3. Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia;4. Department of Medicinal Chemistry, Faculty of Pharmacy, Mansoura University, P.O. Box 35516, Mansoura, Egypt;5. Department of Biochemistry, Faculty of Pharmacy, Egyptian Russian University, Badr City, Cairo, Egypt;6. Department of Applied Organic Chemistry, National Research Center, Dokki, Cairo 12622, Egypt;1. Laboratorio de Estudios sobre Tripanosomiasis, Departamento de Inmunología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, C.P. 04510 México, D.F., Mexico;2. Departamento de Productos Naturales, Instituto de Química, Universidad Nacional Autónoma de México, C.P. 04510 México, D.F., Mexico |
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| Abstract: | Angular and velocity distributions of desorbing O2 during irradiation of 308 nm laser pulses were studied on a stepped Pt(1 1 3) surface. With increases in the coverage, three desorption components collimated at around 12°, 30° and 50° successively appeared when the desorption angle was changed in a plane along the step edge. The translational temperature also showed maxima at these collimation angles, and the values were slightly lower than previous results for 193 nm irradiation. Some possible desorption mechanisms are discussed. |
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