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Author Rawolle, Monika ♦ Ruderer, Matthias A. ♦ Prams, Stefan M. ♦ Zhong, Qi ♦ Magerl, David ♦ Perlich, Jan ♦ Roth, Stephan V. ♦ Lellig, Philipp ♦ Gutmann, Jochen S. ♦ Müller-Buschbaum, Peter
Source World Health Organization (WHO)-Global Index Medicus
Content type Text
Publisher Wiley-VCH
File Format HTM / HTML
Language English
Difficulty Level Medium
Subject Domain (in DDC) Natural sciences & mathematics ♦ Chemistry & allied sciences ♦ Life sciences; biology ♦ Physiology & related subjects ♦ Biochemistry ♦ Technology ♦ Medicine & health ♦ Human physiology ♦ Pharmacology and therapeutics ♦ Diseases ♦ Agriculture & related technologies ♦ Manufacture for specific uses ♦ Precision instruments & other devices
Subject Domain (in MeSH) Inorganic Chemicals ♦ Macromolecular Substances ♦ Chemicals and Drugs ♦ Diagnosis ♦ Investigative Techniques ♦ Analytical, Diagnostic and Therapeutic Techniques and Equipment ♦ Physical Phenomena ♦ Chemical Phenomena ♦ Biological Sciences ♦ Technology, Industry, and Agriculture ♦ Technology and Food and Beverages
Subject Keyword Discipline Nanotechnology ♦ Nanostructures ♦ Chemistry ♦ Polymers ♦ Titanium ♦ Microfluidics ♦ Microscopy, Electron, Scanning ♦ Phase Transition ♦ Porosity ♦ Surface Properties ♦ X-rays ♦ Journal Article ♦ Research Support, Non-u.s. Gov't
Abstract Sol-gel templating of titania thin films with the amphiphilic diblock copolymer poly(dimethyl siloxane)-block-methyl methacrylate poly(ethylene oxide) is combined with microfluidic technology to control the structure formation. Due to the laminar flow conditions in the microfluidic cell, a better control of the local composition of the reactive fluid is achieved. The resulting titania films exhibit mesopores and macropores, as determined with scanning electron microscopy, X-ray reflectivity, and grazing incidence small angle X-ray scattering. The titania morphology has three features that are beneficial for application in photovoltaics: 1) a large surface-to-volume ratio important for charge generation with disordered hexagonally arranged mesopores of 25 nm size and a film porosity of up to 0.79, 2) enhanced light scattering that enables the absorption of more light, and 3) a dense titania layer with a thickness of about 6 nm at the substrate (bottom electrode) to prevent short circuits. An optical characterization complements the structural investigation.
Description Country affiliation: Germany
Author Affiliation: Rawolle M ( Lehrstuhl für Funktionelle Materialien, Physik-Department E13, TU München, James-Franck-Strasse 1, 85747 Garching, Germany.)
ISSN 16136810
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Reading ♦ Research ♦ Self Learning
Interactivity Type Expositive
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2011-04-04
Publisher Place Germany
e-ISSN 16136829
Journal Small
Volume Number 7
Issue Number 7

Source: WHO-Global Index Medicus