电化学

Abstract(#br)Release of neurotransmitters and hormones by calcium regulated exocytosis is a fundamental cellular/molecular process that is disrupted in a variety of psychiatric, neurological, and endocrine disorders. Therefore, this area represents a relevant target for drug and therapeutic development, efforts that will be aided by novel analytical tools and devices that provide mechanistically rich data with increased throughput.

Abstract(#br)Electrochemical detection of cadmium-selenide/zinc-sulfide (CdSe@ZnS) quantum dots (QDs) as labeling carriers in an assay for apolipoprotein E (ApoE) detection has been evaluated. The immunocomplex was performed by using tosylactivated magnetic beads as preconcentration platform into a flexible hybrid polydimethylsiloxane (PDMS)-polycarbonate (PC) microfluidic chip with integrated screen printed electrodes (SPE). All the immunoassay was performed in chip and in flow mode. The sensitive electrochemical detection was obtained by square wave anodic stripping voltammetry.

我们报道了一种简单设计的ZnO纳米棒修饰的聚二甲基硅氧烷( PDMS ) /氧化石墨烯纳米片三元纳米复合材料( GO-ZnO NRs )，作为一种优异的超疏水防腐涂料应用于钢铁基体。采用一步化学浴沉积法制备了GO-ZnO杂化纳米填料，并通过溶液浇铸法制备了三元纳米复合材料。分级ZnO NRs为平均宽度40 ~ 50   nm的单晶，

我们报道了一种简单设计的ZnO纳米棒修饰的聚二甲基硅氧烷( PDMS ) /氧化石墨烯纳米片三元纳米复合材料( GO-ZnO NRs )，作为一种优异的超疏水防腐涂料应用于钢铁基体。采用一步化学浴沉积法制备了GO-ZnO杂化纳米填料，并采用溶液浇铸法制备了三元纳米复合材料。分级ZnO NRs为单晶，平均宽度40 ~ 50   nm，平均长度\u003c 1  μm，纤锌矿结构，在[ 0001 ]晶向外露出点。这些NR被修饰在\u003c 2   nm厚的GO片层上，具有纳米级的尺寸、形貌和几何构型。将PDMS / GO - ZnO三元纳米复合材料通过水化固化干燥。考察了分散在PDMS树脂中的不同浓度GO-ZnO杂化纳米填料对阻隔性能和防腐性能的影响。研究了纳米复合涂层的表面特性，包括自由能、超疏水、化学不均匀性和微纳米粗糙度。将碳钢作为相对浸泡表面，在3.5 % NaCl溶液中进行Tafel极化曲线、电化学阻抗谱、开路电位等电化学实验。对涂层试样进行500   h的盐雾试验，研究其耐腐蚀性能。结果表明，添加质量分数为1  %的GO-ZnO杂化纳米填料的有机硅复合材料具有优异的涂层性能。该复合材料表现出较强的超疏水和粗糙度，水接触角为151°，具有一定的耐腐蚀性。因此，所设计的PDMS / GO-ZnO三元纳米复合材料具有优异的超疏水和防腐性能，可用于下一代防腐涂料的设计。