Here we present a systematic study on the morphological deviation of ZnO nanostructure (from sheets to micro-flowers) by varying pH of the solution via precipitation method. In this regard, zinc nitrate hexa-hydrate, NaOH and hydroxylamine hydrochloride (NH2OH HCl) were used. The solution of all three compounds was refluxed at a very low temperature (60 C) for short time (20min). The solution p...

Structural changes of few-layer graphene sheets induced by CF4 plasma treatment are studied by optical microscopy and Raman spectroscopy, together with theoretical simulation. Experimental results suggest a thickness reduction of few-layer graphene sheets subjected to prolonged CF4 plasma treatment while plasma treatment with short time only leads to fluorine functionalization on the surface la...

The purpose of this work is to numerically evaluate the behavior microscopic gas-focused liquid sheets in terms material properties, nozzle structure and operating conditions used for experiments spectroscopy scattering where a short optical path required. numerical simulations are presented gas flow focusing nozzle, capable producing stream consisting sequence perpendicular micrometre thin she...

A novel bath lily-like graphene sheet-wrapped nano-Si composite synthesized via a simple spray drying process exhibits a high reversible capacity of 1525 mAh g(-1) and superior cycling stability, which could be attributed to a synergistic effect between highly conductive graphene sheets and active nanoparticles in the open nano/micro-structure."

Fibrin polymerizes into the fibrous network that is the major structural component of blood clots and thrombi. We demonstrate that fibrin from three different species can also spontaneously polymerize into extensive, molecularly thin, 2D sheets. Sheet assembly occurs in physiologic buffers on both hydrophobic and hydrophilic surfaces, but is routinely observed only when polymerized using very l...

To tackle tissue vascularization, a robust 3-D micro-patterning technique was developed to create complex bioscaffolds from a synthetic biodegradable elastomer (Poly(octamethylene maleate (anhydride) citrate) by pre-patterning, solidifying, and stamping thin polymer sheets layer-by-layer to form intricate micro-structures. The bio-scaffold contains an 3-D perfusable branched network which suppo...

introduction: the information recorded in medical sheets can help us facilitate the treatment process, recognize the quality of performance of the medical staff, plan health care programs and make accurate and appropriate decisions. this study intends to compare the quality of recording information in admission and summary sheets of three hospitals in isfahan in the first six months of 1381. ma...