Materials Literature
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A new mechanism for negative differential resistance (NDR) is discovered in three-terminal graphene devices based on a field-effect transistor configuration. This NDR effect is a universal phenomenon for graphene and is demonstrated in devices fabricated with different types of graphene materials and gate dielectrics.…
Graphene nanoribbons-semiconducting quasi-one-dimensional graphene structures-have great potential for the realization of novel electronic devices. Recently, graphene nanoribbon heterojunctions-interfaces between nanoribbons with unequal band gaps-have been realized with lithographic etching techniques and via chemica…
Breast cancer remains one of the most prevalent and lethal malignancies in women. The inability to diagnose small volume metastases early has limited effective treatment of stage 4 breast cancer. Here we report the rational development and use of a multifunctional superparamagnetic iron oxide nanoparticle (SPION) for…
Hydrogel-based biomaterial systems have great potential for tissue reconstruction by serving as temporary scaffolds and cell delivery vehicles for tissue engineering (TE). Hydrogels have poor mechanical properties and their rapid degradation limits the development and application of hydrogels in TE. In this study, nan…
Spintronic devices currently rely on magnetic switching or controlled motion of domain walls by an external magnetic field or spin-polarized current. Achieving the same degree of magnetic controllability using an electric field has potential advantages including enhanced functionality and low power consumption. Here w…
The energetics and length scales associated with the interaction between point defects (vacancies and self-interstitial atoms) and grain boundaries in bcc Fe was explored. Molecular statics simulations were used to generate a grain boundary structure database that contained $\ensuremath{\approx}$170 grain boundaries w…
Submillimeter single-crystal monolayer and multilayer graphene domains were prepared by an atmospheric pressure chemical vapor deposition method with suppressing nucleation on copper foils through an annealing procedure. A facile oxidation visualization method was applied to study the nucleation density and morphology…
This review focuses on smart nano-materials built of stimuli-responsive (SR) polymers and will discuss their numerous applications in the biomedical field. The authors will first provide an overview of different stimuli and their corresponding, responsive polymers. By introducing myriad functionalities, SR polymers pr…
The electronic and optical behavior of conjugated small molecules constitutes one of the most extensively studied properties of this class of organic compounds.In particular, electron donor-acceptor compounds separated by π-conjugation have attracted much research interest because of their applications as electroactiv…
Objetivo: O objetivo do presente estudo foi comparar as angulações dos bráquetes metálicos pré-ajustados da prescrição Roth de incisivos centrais e caninos superiores esquerdos. Materiais e Método: Para o estudo foram selecionados 10 bráquetes, de três marcas disponíveis no mercado: GAC, Forestadent e Morelli. Foram c…
A novel strategy of coupling Mie's scattering effect into the light-absorption region of TiO2 was developed to enhance the photocatalytic performance of H2 evolution over TiO2 spheres. The TiO2 spheres with different diameters (330-750 nm) were controllably fabricated via adopting different sized polymer poly(methyl m…
The purpose of this work is to obtain a microelectronic component by the mean of a laser treatment. Our choice concerned on the piezoelectric ceramic barium titanate BaTiO3. The first step of this study was to prepare and optimise new kind of inks named composite inks consisted of a mixture of a BaTiO3 powder (nanomet…
The aim of the present work is to manufacture porous ceramics exhibiting an unidirectional channels structure. Different processing routes for freeze casting of particle suspension are studied, with a control of the microstructure orientation. A series of cellular ceramic samples were processed by the ice templating t…
A convergência entre a biotecnologia e a nanotecnologia tem levado ao desenvolvimento de novos nanobiocompósitos híbridos com funções sinérgicas que incorporam as propriedades de reconhecimento dos biomateriais com as propriedades eletrônicas, ópticas e catalíticas únicas das nanopartículas. Apesar do recente desenvol…
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Nanowhiskers semicondutores de compostos III-V apresentam grande potencial para aplicações tecnológicas. Controlando as condições de crescimento, tais como temperatura e diâmetro, é possível alternar entre as fases cristalinas zincblend e wurtzita, dando origem ao politipismo. Esse efeito tem grande influência nas pro…
Le travail présenté ici a pour but d’évaluer l’influence de surcharges incidentelles sur le comportement en fatigue de tôles en acier soudées par points et destinées à une application automobile. Une campagne d’essais expérimentale sur éprouvettes a permis d’établir les courbes effort – durée de vie de trois nuances d…
Luminescence of semiconductors is nowadays based on very firm background of solid state physics. The purpose of this book is to introduce the reader to the study of the physical principles underlying inorganic semiconductor luminescence phenomena. It guides the reader starting from the very introductory definitions ov…
Luminescence of semiconductors is nowadays based on very firm background of solid state physics. The purpose of this book is to introduce the reader to the study of the physical principles underlying inorganic semiconductor luminescence phenomena. It guides the reader starting from the very introductory definitions ov…
Luminescence of semiconductors is nowadays based on very firm background of solid state physics. The purpose of this book is to introduce the reader to the study of the physical principles underlying inorganic semiconductor luminescence phenomena. It guides the reader starting from the very introductory definitions ov…