UFSC » Programa de Pós-Graduação em Física
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(Português) Divulgação do Processo Seletivo para ingresso no Programa de Pós-Graduação em Física da Universidade Federal de Santa Catarina (PPGFSC/UFSC) – semestre 2015/2
Publicado em 23/02/2015 às 10:00

Defence of M.Sc. dissertation of Giovanni Formighieri – 31/March/2015 – 5:00 pm
Publicado em 26/03/2015 às 15:18

 The Physics Graduate Program invites everyone to:

 

 Defence of M.Sc. dissertation

 Giovanni Formighieri

 O ESPAÇO-TEMPO DE UM DIPOLO MAGNÉTICO

Defense Commitee

 Prof. Dr. Celso de Camargo Barros Junior – (president) - UFSC/FSC

Prof. Dr. Marcelo Dalagnol Alloy – (external member) - UFFS/Chapecó

Profª. Drª. Débora Peres Menezes – (local member) - UFSC/FSC

Prof. Dr. Eduardo Cerutti Mattei – (local member) - UFSC/FSC

 

Date: 31/March/2015 - tuesday - Time: 5:00 pm - Place: Sala 201 - Sala de Reuniões do Programa de Pós-Graduação em Física

(Português) Relato da 167ª Reunião Ordinária do Colegiado Delegado do Programa de Pós-Graduação em Física da UFSC
Publicado em 25/03/2015 às 14:10

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Qualifying Examination for Doctoral Thesis of Daniel Salvador – 31/March/2015 – tuesday-4:20 pm
Publicado em 25/03/2015 às 11:01

The Physics Graduate Program invites everyone to:

Qualifying Examination for Doctoral Thesis

 Daniel Salvador

 TRANSIÇÕES DE FASE NO MODELO DE POTTS COM MODULAÇÃO APERIÓDICA

 

Defense Committee:

 Prof. Dr. Nilton da Silva Branco - (president) - FSC/UFSC

Prof. Dr. Jürgen Fritz Stilck - (external member) - UFF/IF

Prof. Dr. Wagner Figueiredo - (local member) - UFSC/FSC

Prof. Dr. Daniel Girardi - (local member) - UFSC/Blumenau

Prof. Dr. Marcelo Henrique Romano Tragtenberg – (supplementary member) - UFSC/FSC

Date: 31/March/2015 - tuesday - Time: 4:20 pm - Place: Auditório do LAED - (piso térreo do Departamento de Matemática)

 

 

 

 

 

Defence of M.Sc. dissertation of Luiza Gomes Ferreira – 31/March/2015 – 10:00 am
Publicado em 25/03/2015 às 9:44

The Physics Graduate Program invites everyone to:

 Defence of M.Sc. dissertation

 Luiza Gomes Ferreira

 UM MODELO SIMPLIFICADO PARA A DINÂMICA DE MOTORES MOLECULARES

 

Defense Commitee

Prof. Dr. Wagner Figueiredo – (president) - UFSC/FSC

Profª. Drª. Carla Goldman – (external member) - USP/IF

Prof. Dr. Nilton da Silva Branco – (local member) - UFSC/FSC

Prof. Dr. Lucas Nicolao – (local member) - UFSC/FSC

Prof. Dr. Eduardo Cerutti Mattei – (supplementary member) - UFSC/FSC

 

 Date: 31/March/2015 - tuesday - Time: 10:00 am - Place: Sala 212 - Auditório do Departamento de Física

 

Defence of M.Sc. dissertation of Rodrigo Sergio Tiedt – 31/March/2015 – 2:00 pm
Publicado em 25/03/2015 às 9:00

The Physics Graduate Program invites everyone to:

Defence of M.Sc. dissertation

 Rodrigo Sergio Tiedt

 EFEITO DA RADIAÇÃO ULTRAVIOLETA NA FORMAÇÃO DE NÚCLEOS DE CONDENSAÇÃO DE NUVENS EM MISTURAS DE ÁGUA E DIMETILSULFETO

Defense Commitee

 Prof. Dr. Manoel Gustavo Petrucelli Homem – (president) - UFSCar/QMC

Prof. Dr. Reinaldo Luiz Cavasso Filho – (external member) - UFABC/CCNH

Prof. Dr. Renato Ramos da Silva – (local member) - UFSC/Meteorologia

Prof. Dr. Danilo de Paiva Almeida – (local member) - UFSC/FSC

Prof. Dr. Wendell Rondinelli Gomes Farias – (supplementary member) - UFSC/FSC

Date: 31/March/2015 - tuesday - Time: 2:00 pm - Place: Sala 212 - Auditório do Departamento de Física

 

Seminar with prof. Prof. Dr. Giovanni Zangari – 27/March/2015 – 10h15min
Publicado em 24/03/2015 às 8:35

 THE PHYSICS GRADUATE PROGRAM invites everyone to the seminar: 

 

   Hydrogen from Sunlight – Photoelectrochemical Water Splitting with Li-doped TiO2 Nanotubes 

Prof. Dr. Giovanni Zangari

Department of Materials Science and Engineering, University of Virginia - Charlottesville, VA, USA

 

Abstract:

While solar energy is one of the few energy sources capable of meeting the world’s energy demands,1 the transient nature of sunlight necessitates the development of technologies to store that energy for on-demand use to supplement photovoltaics.2 Photoelectrochemical solar cells use sunlight to electrolyze water to produce hydrogen as a storable fuel, which can then be converted to electricity by a fuel cell. TiO2 nanotubes formed by the anodization of titanium foils in electrolytes containing fluoride ions produce aligned arrays of tube-like structures 70-100 nm in width and tunable length on the order of microns as shown in Figure 1(a, b). These structures are a promising architecture for photoelectrochemical applications3 because of their high stability in solution and under irradiation, high surface area, and 1-dimensional charge transport for efficient movement of photogenerated charges. While hundreds of microns long nanotubes in principle may be grown, one major limitation on the performance of TiO2 nanotubes is the presence of defects in the crystal structure which facilitate the recombination of photogenerated electron-hole pairs;4 the best photoelectrochemical performance of TiO2 nanotubes for water splitting has been observed in Nb-doped TiO2 with a length of 7 mm and an associated photocurrent of 1.0 mA/cm2.5 Electrochemical Li doping was demonstrated to passivate the trap states in TiO2 nanotubes, suppressing recombination. This process resulted in up to a 2 fold increase in the photoelectrochemical performance of 1 mm long TiO2 nanotubes compared to the undoped samples.6 For long TiO2 nanotubes, a new optimum length of 15 mm was achieved, resulting in 1.5 mA/cm2 of photocurrent at 1.0 VSCE under simulated sunlight as seen in Figure 1(c). These results demonstrate the ability to produce high performance TiO2 nanotubes for photoelectrochemical solar energy devices using simple electrochemical techniques.

imagem1imagem2

 

Figure 1. (a) Cross section and (b) surface view of TiO2 nanotubes grown by anodization. (c) Lithium intercalation enhances the photocurrent by trap state passivation, resulting in up to 1.5 mA/cm2 of photocurrent at 15 m.

References

(1)            Lewis, N. S.; Nocera, D. G. Proc. Natl. Acad. Sci. U. S. Amer. 2006, 103, 15729.
(2)            Cook, T. R.; Dogutan, D. K.; Reece, S. Y.; Surendranath, Y.; Teets, T. S.; Nocera, D. G. Chem. Rev. 2010, 110, 6474.
(3)            Tsui, L. -k.; Zangari, G. J. Electrochem. Soc. 2014, 161, D3066
(4)            Tsui, L.; Zangari, G. Electrochim. Acta 2014, 121, 203.
(5)            Das, C.; Roy, P.; Yang, M.; Jha, H.; Schmuki, P. Nanoscale 2011, 3, 3094.
(6)            Tsui, L.; Saito, M.; Homma, T.; Zangari, G. J. Mater. Chem. A 2015, 3, 360.

 

 Date: 27/March/2015 - (friday) - Place: Sala 212 - Auditório do Departamento de Física- Time: 10h15min

 

 

 

 

Qualifying Examination for Doctoral Thesis of Paulo Roberto Innocente – 13/March/2015 – friday-10:00 am
Publicado em 16/03/2015 às 7:45

The Physics Graduate Program invites everyone to:

Qualifying Examination for Doctoral Thesis

 Paulo Roberto Innocente

 Estudo da Geração de H2 com Fotocatodo de Cu2O

 

Defense Committee:

 Prof. Dr. André Avelino Pasa - (president) - FSC/UFSC

Prof. Dr. Andre Santarosa Ferlauto - (external member) - UFMG/FSC

Prof. Dr. Rafael Gallina Delatorre - (local member) - UFSC - Joinville

Prof. Dr. Kleber Ersching - (local member) - IFC/Camboriú

Drª Silvia Pelegrini – (supplementary member) - UFSC/FSC

Date: 13/March/2015 - friday - Time: 10:00 am - Place: Sala 114 - Sala de Reuniões do Departamento de Física

 

Qualifying Examination for Doctoral Thesis of Juan Camilo Macias Ramirez – 20/March/2015 – friday-10:00 am
Publicado em 13/03/2015 às 17:03

The Physics Graduate Program invites everyone to:

Qualifying Examination for Doctoral Thesis

 Juan Camilo Macias Ramirez

 Confinamento e Susceptibilidade da Matéria Hadrônica em Teoria de Perturbação Otimizada

 

Defense Committee:

 Prof. Dr. Marcus Emmanuel Benghi Pinto - (president) - FSC/UFSC

Prof. Dr. Sidney dos Santos Avancini - (external member) - UFSC/FSC

Prof. Dr. Celso de Camargo Barros Junior - (Local member) - UFSC/FSC

Prof. Dr. Paulo Juliano Liebgott - (local member) - UFSC/FSC

Date: 20/March/2015 - friday - Time: 10:00 am - Place: Sala de Aula 206 - Departamento de Física

 

 

Doctoral Thesis defence of Robson Lourenço Cavalcanti – 19/March/2015 – thursday – Times: 2:00 pm
Publicado em 13/03/2015 às 14:00

The Physics Graduate Program invites everyone to:

 Defense of Doctoral Thesis

 Robson Lourenço Cavalcanti

  Caracterização impedimétrica do crescimento de camadas porosas em ITO

 

Defense Committee:

 Profª. Drª. Maria Luisa Sartorelli – (president) - FSC/UFSC

Prof. Dr. Antonio Riul Júnior – (external member) - IF/UNICAMP

Drª Edna Regina Spada – (external member) - USP/IFSC

Prof. Dr. Lucas Natálio Chavero – (membro titular) - UFSC/Blumenau

Profª. Drª. Françoise Toledo Reis – (local member) - UFSC/FSC

Profª. Drª. Marta Elisa Rosso Dotto – (local member) - UFSC/FSC

 

 Date: 19/March/2015 - thursday - Times: 2:00 pm - Place: Sala 212 - Auditório do Departamento de Física

(Português) Convocação para a 167ª Reunião Ordinária do Colegiado Delegado
Publicado em 12/03/2015 às 8:47

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