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Nanoscale ; 2(9): 1573-87, 2010 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-20820688


Recently, one-dimensional (1D) ZnO nanomaterials (NMs) have been extensively studied because both their functional properties and highly controllable morphology make them important building blocks for understanding nanoscale phenomena and realizing nanoscale devices. Compared with high temperature (>450 degrees C) vapor phase methods, solution-based synthesis methods can be conducted at low temperatures (25-200 degrees C) allowing for compatibility with many organic substrate materials and offer additional advantages such as straightforward processing, low cost, and ease of scale up. Although there exist several review articles in the literature regarding the synthesis and applications of 1D ZnO NMs, those focusing on solution-based synthesis methods are lacking. Thus, this review focuses mainly on 1D ZnO NMs synthesized by solution-based processing. Firstly, 1D ZnO non-patterned, nanoparticle-seeded synthesis and its associated solution growth kinetics are discussed. Next, synthesis of vertically-aligned ZnO nanorod arrays with controlled pattern and density on various substrates is reviewed. Finally, important applications of 1D ZnO NMs are highlighted including sensors, field emission devices, photodetectors, optical switches, and solar cells.

Nanoestruturas/química , Soluções/química , Óxido de Zinco/química , Técnicas Biossensoriais , Cinética , Nanoestruturas/ultraestrutura , Energia Solar
Cutis ; 82(1): 38-46, 2008 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-18712023


Tick-borne disease in the United States continues to be a threat as people interact with their natural surroundings. We present a case of an 8-year-old boy with a larval tick infestation. Ticks within the United States can carry Lyme disease, Rocky Mountain spotted fever (RMSF), ehrlichiosis, babesiosis, tularemia, tick-borne relapsing fever, and tick paralysis. These preventable diseases are treatable when accurately recognized and diagnosed; however, if left untreated, they can cause substantial morbidity and mortality. This article highlights the knowledge necessary to recognize, treat, and prevent tickborne disease.

Ixodes , Infestações por Carrapato/diagnóstico , Doenças Transmitidas por Carrapatos/diagnóstico , Animais , Criança , Humanos , Larva , Masculino , Infestações por Carrapato/terapia , Doenças Transmitidas por Carrapatos/terapia
Nanotechnology ; 19(43): 435302, 2008 Oct 29.
Artigo em Inglês | MEDLINE | ID: mdl-21832689


A simple, scalable, and cost-effective technique for controlling the growth density of ZnO nanorod arrays based on a layer-by-layer polyelectrolyte polymer film is demonstrated. The ZnO nanorods were synthesized using a low temperature (T = 90 °C), solution-based method. The density-control technique utilizes a polymer thin film pre-coated on the substrate to control the mass transport of the reactant to the substrate. The density-controlled arrays were investigated as potential field emission candidates. The field emission results revealed that an emitter density of 7 nanorods µm(-2) and a tapered nanorod morphology generated a high field enhancement factor of 5884. This novel technique shows promise for applications in flat panel display technology.