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Dc four-point resistance of a double-barrier quantum pump
(American Physical Society, 2009-12)
We investigate the behavior of the dc voltage drop in a periodically driven double-barrier structure (DBS) sensed by voltages probes that are weakly coupled to the system. We find that the four-terminal resistance R4t ...
Design and construction a four-point method system for electrical characterization of thin films with photovoltaic applications
(2015-10-21)
We present a system for measuring the sheet resistance by the four point method in semiconductor thin films. The system includes: a sample holder, a head holder probes, two electrometers Keithley Model 6517B of high ...
A simple method to generate spontaneous chemisorption of metallic particles mediated by carboxylate groups from silylated oligomeric poly(amide-imide)s
(2017)
The present work describes oligomeric poly(amide-imide)s (PAIs) containing several L-amino acidic residues and two silicon atoms in their repeat unit, whose carboxylate terminal group was chemisorbed onto metallic particles ...
Comparison of RF and Pulsed Magnetron Sputtering for the Deposition of AZO Thin Films on PET
(Univ Fed Sao Carlos, Dept Engenharia Materials, 2020-01-01)
AZO thin films (around 200 nm thick) were grown on polyethylene terephthalate (PET) at room temperature. The plasma was activated using a 13.56 MHz (RF) or a 15 kHz pulsed (PMS) source at a power of 60 W. Optical reflection ...
Effect of the precipitates on the thermodynamics of the martensitic transformations in Ti-rich Ni-Ti-Co thin films
(Elsevier Science, 2020-03)
The wide-spread multiple transformation in Ti-rich Ni-Ti shape memory alloys produced by Ti2Ni nano-precipitates was investigated. For this purpose, a series of amorphous Ti-Ni-Co thin films with the same composition were ...
Transporte eletrônico em filmes ultrafinos nanoestruturados : o sistema SNO2:SB
(Universidade Federal de São CarlosUFSCarPrograma de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEMCâmpus São Carlos, 2015-12-14)
This thesis describes a study of the electronic charge transport properties in antimony-doped tin oxide (ATO) ultrathin films, prepared by two different methods: by colloidal deposition process (CDP) and by pulsed electron ...
Large p explorations. From SUGRA to big STRINGS in Mellin space
(2020-12-01)
We explore a new way of probing scattering of closed strings in AdS5×S5, which we call ‘the large p limit’. It consists of studying four-point correlators of single-particle operators in N = 4 SYM at large N and large ’t ...
Optical, electrical and electrochemical evaluation of sputtered platinum counter electrodes for dye sensitized solar cells
(Elsevier Science Bv, 2016)
Since Gratzel and O'Regan started in 1991, dye-sensitized solar cells (DSSC) have been extensively studied around the world. In addition to increasing efficiency, their characteristics such as low cost materials and ...