Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 3 de 3
Filtrar
Mais filtros










Base de dados
Intervalo de ano de publicação
1.
Chem Commun (Camb) ; 47(28): 7944-6, 2011 Jul 28.
Artigo em Inglês | MEDLINE | ID: mdl-21509359

RESUMO

Functionalization of light-emitting poly(3-methylthiophene) (P3MT) nanowires (NWs) with probe-DNA (p-DNA) and their label-free recognition of target-DNA (t-DNA) were correlated quantitatively with both the photoluminescence (PL) color and intensity of P3MT NWs.


Assuntos
Técnicas de Química Analítica/instrumentação , DNA/análise , Luz , Nanofios/química , Polímeros/química , Tiofenos/química , Óxido de Alumínio/química , Benzenossulfonatos/química , DNA/química , Eletroquímica , Eletrodos , Medições Luminescentes , Compostos de Amônio Quaternário/química
2.
Langmuir ; 24(6): 2900-7, 2008 Mar 18.
Artigo em Inglês | MEDLINE | ID: mdl-18260678

RESUMO

Even though the inkjet technology has been recognized as one of the most promising technologies for electronic and bio industries, the full understanding of the dynamics of an inkjet droplet at its operating conditions is still lacking. In this study, the normal impact of water droplets on solid substrates was investigated experimentally. The size of water droplets studied here was 46 microm and was much smaller than the most of the previous studies on drop impact. The Weber number (We) and Reynolds number (Re) were 0.05-2 and 10-100, respectively, and the Ohnesorge number was fixed at 0.017. The wettability of the solid substrate was varied by adsorbing a self-assembled monolayer of octadecyltrichlorosilane followed by the exposure to UV-ozone plasma. The impact scenarios for low We impacts were found to be qualitatively different from the high to moderate We impacts. Neither the development of a thin film and lamella under the traveling sphere nor the entrapment of small bubbles was observed. The dynamics of droplet impact at the conditions studied here is found to proceed under the combined influences of inertia, surface tension, and viscosity without being dominated by one specific mechanism. The maximum spreading factor (beta), the ratio of the diameter of the wetted surface and the drop diameter before impact, was correlated well with the relationship ln beta=0.090 ln We/(fs-cos theta)+0.151 for three decades of We/(fs-cos theta), where theta is the equilibrium contact angle, and fs is the ratio between the surface areas contacting the air and the solid substrate. The result implies that the final shape of the droplet is determined by the surface phenomenon rather than fluid mechanical effects.


Assuntos
Membranas Artificiais , Silanos/química , Dióxido de Silício/química , Silício/química , Água/química , Adsorção , Propriedades de Superfície , Molhabilidade
3.
J Am Chem Soc ; 127(50): 17580-1, 2005 Dec 21.
Artigo em Inglês | MEDLINE | ID: mdl-16351068

RESUMO

Self-assembled diacetylene vesicles were spotted and immobilized on aldehyde-modified glass substrates using conventional microarray technology. Irradiation of the immobilized diacetylenes allowed generation of nonfluorescent "blue-phase" polydiacetylene (PDA) arrays. Specific interaction of the PDA vesicle arrays with carbohydrates or poly(acrylic acid) solutions afforded fluorescent profiles.


Assuntos
Acetileno/análogos & derivados , Corantes Fluorescentes/química , Polímeros/química , Acetileno/química , Ácidos Graxos Insaturados/química , Microscopia de Fluorescência , Polímero Poliacetilênico , Poli-Inos , alfa-Ciclodextrinas/química
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...