Self-assembling of metal nanoparticles on patterned semiconductor surfaces (Au/GaAs) |
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| Institution: | 1. Research Group Integrated Optoelectronics and Microoptics (IOE), Physics Department, Kaiserslautern University of Technology, PO Box 3049, D-67653 Kaiserslautern, Germany;2. Institute of Solid State Physics, Technical University of Berlin, Hardenbergstrasse 36, D-10623 Berlin, Germany;3. Fakultät für Physik and CENIDE, Universität Duisburg-Essen, Lotharstraße 1, 47057 Duisburg, Germany;1. CIACyT-UASLP, Sierra Leona Av. # 550, Lomas 2a Secc, San Luis Potosí, S.L.P. 78210, México;2. Physics Department, CINVESTAV-IPN, Apdo. Postal 14470 D. F. México, México;3. IICO-UASLP, Av. Karakorum 1470, Lomas 4a. Sección, San Luis Potosí, S.L.P. 78210, México;1. Department of Neurosurgery, Kohnan Hospital, Sendai, Japan;2. Department of Neurosurgery, Tohoku University Graduate School of Medicine, Sendai, Japan;3. Department of Neurosurgery, Akita University Graduate School of Medicine, Akita, Japan;4. Department of Neurosurgery, National Hospital Organization Sendai Medical Center, Sendai, Japan;1. Centre of Excellence in Solid State Physics, University of the Punjab, Lahore-54590, Pakistan;2. Institut Jean Lamour, Nancy-University, UPVM, CNRS, Boulevard des Aiguillettes, B.P. 239, 54506, Vandæuvre-lès-nancy cedex, France.;1. Department of Surgery, Penn State Hershey Medical Center, 500 University Drive, MC H149, Hershey, Pennsylvania 17033;2. Department of Surgery, Case Western Reserve University School of Medicine, Cleveland, Ohio |
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| Abstract: | The fabrication of selectively deposited arrays of metal nanoparticles on textured semiconductor surfaces is reported. Gold nanoparticles were grown on previously textured surfaces using photostimulated chemical deposition from an aqueous solution of AuCl3 salt. Surfaces with random and periodic microreliefs were used as templates of sites for nanoparticle deposition. Dendrite-like and quasi-grating-like microreliefs were produced by anisotropic etching of GaAs (100) substrates. Periodic reliefs (diffraction gratings and bi-gratings) were fabricated by the holographic photochemical etching of the same substrates. Our results from AFM, SEM and EDX show that gold predominantly locates on the tops of the microreliefs. Since the surface relief strongly affects the topology of metal deposition, the use of microprofiling of semiconductor surfaces allows designing nanostructure deposition. |
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