caa a22 4500 445303611 CHVBK 20180317142605.0 cr unu---uuuuu 170323e20101001xx s 000 0 eng 10.1007/s12274-010-0034-4 doi (NATIONALLICENCE)springer-10.1007/s12274-010-0034-4 Contactless monitoring of the diameter-dependent conductivity of GaAs nanowires [Elektronische Daten] [Fauzia Jabeen, Silvia Rubini, Faustino Martelli, Alfonso Franciosi, Andrei Kolmakov, Luca Gregoratti, Matteo Amati, Alexei Barinov, Andrea Goldoni, Maya Kiskinova] Contactless monitoring with photoelectron microspectroscopy of the surface potential along individual nanostructures, created by the X-ray nanoprobe, opens exciting possibilities to examine quantitatively size- and surface-chemistry-effects on the electrical transport of semiconductor nanowires (NWs). Implementing this novel approach-which combines surface chemical microanalysis with conductivity measurements-we explored the dependence of the electrical properties of undoped GaAs NWs on the NW width, temperature and surface chemistry. By following the evolution of the Ga 3d and As 3d core level spectra, we measured the position-dependent surface potential along the GaAs NWs as a function of NW diameter, decreasing from 120 to ?20 nm, and correlated the observed decrease of the conductivity with the monotonic reduction in the NW diameter from 120 to ~20 nm. Exposure of the GaAs NWs to oxygen ambient leads to a decrease in their conductivity by up to a factor of 10, attributed to the significant decrease in the carrier density associated with the formation of an oxide shell. Tsinghua University Press and Springer-Verlag Berlin Heidelberg, 2010 Semiconductor nanowires nationallicence charge transport nationallicence surface oxidation nationallicence photoelectron X-ray microscopy nationallicence charging nationallicence GaAs nationallicence Jabeen Fauzia Sincrotrone Trieste S. C. P. A., Elettra Laboratory, Area Science Park, S. S. 14, Km. 163.5, I-34149, Trieste, Italy aut Rubini Silvia Laboratorio TASC IOM-CNR, Area Science Park, S. S. 14, Km. 163.5, I-34149, Trieste, Italy aut Martelli Faustino Laboratorio TASC IOM-CNR, Area Science Park, S. S. 14, Km. 163.5, I-34149, Trieste, Italy aut Franciosi Alfonso Sincrotrone Trieste S. C. P. A., Elettra Laboratory, Area Science Park, S. S. 14, Km. 163.5, I-34149, Trieste, Italy aut Kolmakov Andrei Department of Physics, Southern Illinois University Carbondale, 1245 Lincoln Dr. Neckers 478, 62901-4401, Carbondale, IL, USA aut Gregoratti Luca Sincrotrone Trieste S. C. P. A., Elettra Laboratory, Area Science Park, S. S. 14, Km. 163.5, I-34149, Trieste, Italy aut Amati Matteo Sincrotrone Trieste S. C. P. A., Elettra Laboratory, Area Science Park, S. S. 14, Km. 163.5, I-34149, Trieste, Italy aut Barinov Alexei Sincrotrone Trieste S. C. P. A., Elettra Laboratory, Area Science Park, S. S. 14, Km. 163.5, I-34149, Trieste, Italy aut Goldoni Andrea Sincrotrone Trieste S. C. P. A., Elettra Laboratory, Area Science Park, S. S. 14, Km. 163.5, I-34149, Trieste, Italy aut Kiskinova Maya Sincrotrone Trieste S. C. P. A., Elettra Laboratory, Area Science Park, S. S. 14, Km. 163.5, I-34149, Trieste, Italy aut Nano Research Tsinghua Press 3/10(2010-10-01), 706-713 1998-0124 3:10<706 2010 3 12274 https://doi.org/10.1007/s12274-010-0034-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12274-010-0034-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jabeen Fauzia Sincrotrone Trieste S. C. P. A., Elettra Laboratory, Area Science Park, S. S. 14, Km. 163.5, I-34149, Trieste, Italy aut NATIONALLICENCE 700 1- Rubini Silvia Laboratorio TASC IOM-CNR, Area Science Park, S. S. 14, Km. 163.5, I-34149, Trieste, Italy aut NATIONALLICENCE 700 1- Martelli Faustino Laboratorio TASC IOM-CNR, Area Science Park, S. S. 14, Km. 163.5, I-34149, Trieste, Italy aut NATIONALLICENCE 700 1- Franciosi Alfonso Sincrotrone Trieste S. C. P. A., Elettra Laboratory, Area Science Park, S. S. 14, Km. 163.5, I-34149, Trieste, Italy aut NATIONALLICENCE 700 1- Kolmakov Andrei Department of Physics, Southern Illinois University Carbondale, 1245 Lincoln Dr. Neckers 478, 62901-4401, Carbondale, IL, USA aut NATIONALLICENCE 700 1- Gregoratti Luca Sincrotrone Trieste S. C. P. A., Elettra Laboratory, Area Science Park, S. S. 14, Km. 163.5, I-34149, Trieste, Italy aut NATIONALLICENCE 700 1- Amati Matteo Sincrotrone Trieste S. C. P. A., Elettra Laboratory, Area Science Park, S. S. 14, Km. 163.5, I-34149, Trieste, Italy aut NATIONALLICENCE 700 1- Barinov Alexei Sincrotrone Trieste S. C. P. A., Elettra Laboratory, Area Science Park, S. S. 14, Km. 163.5, I-34149, Trieste, Italy aut NATIONALLICENCE 700 1- Goldoni Andrea Sincrotrone Trieste S. C. P. A., Elettra Laboratory, Area Science Park, S. S. 14, Km. 163.5, I-34149, Trieste, Italy aut NATIONALLICENCE 700 1- Kiskinova Maya Sincrotrone Trieste S. C. P. A., Elettra Laboratory, Area Science Park, S. S. 14, Km. 163.5, I-34149, Trieste, Italy aut NATIONALLICENCE 773 0- Nano Research Tsinghua Press 3/10(2010-10-01), 706-713 1998-0124 3:10<706 2010 3 12274 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer