Nanostructures Materials
Mostrando 1-12 de 27 artigos, teses e dissertações.
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1. Proteins and Peptides at the Interfaces of Nanostructures
Abstract: The present review focuses on the proteins and peptides at the interfaces of nanostructured metals and semiconductors as a result of their use in synthesis in-situ and functionalization of nanostructures. We start the review with an introduction about the peculiar properties of nanostructured materials and their applications. In the following, the
An. Acad. Bras. Ciênc.. Publicado em: 25/11/2019
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2. Removal of Orange G Dye by Manganese Oxide Nanostructures
Two types of manganese oxide were investigated for the removal/degradation of Orange G (OG) dye in aqueous solution. One manganese oxide (pyrolusite) was obtained commercially and the other (birnessite) was prepared according to the polyol method by means of the oxidation of MnII hydroxide by H2O2. Both materials were characterized by X-ray diffraction (XRD)
J. Braz. Chem. Soc.. Publicado em: 12/08/2019
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3. Development of metakaolin and geopolymer proppants with nanocarbon materials
Abstract From the first hydraulic fracturing in the 40’s until nowadays, the techniques of each process step have evolved significantly. This study presents a new approach on the development of metakaolin (MK) and geopolymer based proppant with and without nanocarbon materials such as multi-walled carbon nanotubes and graphene oxide. For manufacturing the
Cerâmica. Publicado em: 2019-01
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4. Carbon nanotube buckypaper reinforced polymer composites: a review
Abstract This review provides valuable information about the general characteristics, processing conditions and physical properties of carbon nanotube buckypaper (BP) and its polymer composites. Vacuum filtration is the most common technique used for manufacturing BP, since the carbon nanotubes are dispersed in aqueous solution with the aid of surfactant. Pr
Polímeros. Publicado em: 21/09/2017
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5. Opto-electronic Properties of Nano-electronic Materials
Nanoelectronic is nanotechnology applied in the context of electronic circuits and systems. Molecular electronic, which is supposed to replace silicon electronic in the future, is an incipient branch of Nanotechnology which focusing on the organic molecules. Since recognizing and examining this family of Nanostructures needs a long time and very expensive, a
Mat. Res.. Publicado em: 13/07/2017
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6. Syntesis of Carbon Nanostructures Near Room Temperature Using Microwave PECVD
Carbon nanostructures (nanotubes, nanofibers and nanosponges) were synthesized onto Si (001) substrates using a microwave assisted plasma enhanced chemical vapor deposition (PECVD) from C2H2-Ar mixtures at low substrate temperatures (120 °C). Catalytic films (Ni and Cu) 3 nm thick were used. Different structures were formed, depending on the C2H2 partial pr
Mat. Res.. Publicado em: 2015-08
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7. CuO Nanofibers Immobilized on Paraffin-Impregnated Graphite Electrode and its Application in the Amperometric Detection of Glucose
1-D nanostructures are promising materials for development of electrochemical devices offering benefits such as fast electron transfer rates and large surface areas. Copper oxide nanofibers (CuO-NFs) synthesized by electrospinning technique and subsequent thermal treatment, were used to modify paraffin-impregnated graphite electrode (PIGE) for a sensitive
J. Braz. Chem. Soc.. Publicado em: 2015-08
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8. Modeling the size dependent pull-in instability of beam-type NEMS using strain gradient theory
It is well recognized that size dependency of materials characteristics, i.e. size-effect, often plays a significant role in the performance of nano-structures. Herein, strain gradient continuum theory is employed to investigate the size dependent pull-in instability of beam-type nano-electromechanical systems (NEMS). Two most common types of NEMS i.e. nano-
Lat. Am. j. solids struct.. Publicado em: 2014
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9. Nanoestrutura de CdS: propriedades estruturais, eletrônicas e oxidação
CdS nanostructures form different shapes, with potential applications in solar cells, optical and mechanical devices. The presence of oxygen in nanostructures of these materials can be useful for obtaining new forms such as propellers, as well as for the construction of high performance devices as regards grinding. In this work, we made initially a comparati
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/08/2012
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10. Desenvolvimento de materiais e métodos de fabricação de sensores químicos/bioquímicos baseados em silício e nanoestruturas de carbono (ISFET, CNTFET e GraFET) : Development of materials and methods of fabrication of chemical/biochemical sensors based on silicon and carbon nanostructures (ISFET, CNTFET and GraFET) / Development of materials and methods of fabrication of chemical/biochemical sensors based on silicon and carbon nanostructures (ISFET, CNTFET and GraFET)
Este trabalho teve como objetivo o desenvolvimento de materiais e métodos avançados de fabricação de sensores químicos/bioquímicos. Utilizando equipamentos disponíveis no Centro de Componentes Semicondutores da UNICAMP, foram desenvolvidos e caracterizados filmes finos de alta constante dielétrica e filmes metálicos. Os materiais desenvolvidos foram
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/07/2012
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11. Síntese e caracterização de nanoestruturas peptídicas: estudos espectroscópicos e aplicações / Synthesis and characterization of peptide nanostructures: spectroscopic studies and applications
The study had as aimed the development of nanostructured materials based on processes of molecular self-assembly of peptide compounds in order to obtain systems of great structural versatility seeking possible applications related to bionanotechnology. In this regard, peptide sequences based on linear and cyclic precursors were synthesized by solid-phase met
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2012
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12. Bending investigation on carbon fiber/epoxy composites nano-modified by graphene
An extreme conditions situation, e.g. pre-salt deep sea exploration, requires new materials with even better performance. Nanotechnology is the new paradigm that can lead to the development of these new super materials. The effect of graphene pileups dispersion into carbon fiber/epoxy composites was investigated experimentally. The dispersion process was bas
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012-09