量子点

Abstract(#br)This study demonstrates the high performance of GaAs solar cells with dual-layer CdS quantum dots (QDs) carried by flexible polydimethylsiloxane (PDMS) film. Several parameters were enhanced, including the short circuit current, fill factor, and power conversion efficiency, which were measured under white light illumination similar to the solar spectrum. The flexible PDMS film was fabricated using the spin-coating technique, and was then used to embed dual-layer CdS QDs. Different concentrations of QDs were applied in this design to test the optimal combination.

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.

Abstract(#br)In this work, a simple, flexible and low-cost sample-introduction technique was developed and integrated with droplet platform. The sample-introduction strategy was realized based on connecting the components of positive pressure input device, sample container and microfluidic chip through the tygon tubing with homemade polydimethylsiloxane (PDMS) adaptor, so the sample was delivered into the microchip from the sample container under the driving of positive pressure.

Abstract(#br)In this study, we developed a multiplex immunoassay system that combines the suspension and planar microarray formats within a single layer of polydimethylsiloxane (PDMS) using soft lithography technology. The suspension format was based on the target proteins forming a sandwich structure between the magnetic beads and the quantum dot (QD) probes through specific antibody–antigen interactions. The planar microarray format was produced by fabricating an array of micro-wells in PDMS.

Abstract(#br)Functionalization of thin and stretchable polymer layers by nano- and micro-patterning of nanoparticles is a very promising field of research that can lead to many different applications in biology and nanotechnology. In this work, we present a new procedure to self-assemble semiconductor quantum dots (QDs) nanoparticles by a simple fabrication process on a freestanding flexible PolyDiMethylSiloxane (PDMS) membrane.

量子点( QDs )是具有独特尺寸可调发光的半导体纳米晶。为了获得精确的发射光谱，尺寸上的单分散性是必不可少的，它是通过控制反应动力学在连续流动的活性微反应器中实现的。进一步，采用多元方法(量纲分析)对导致CdTe量子点单分散制备的反应过程进行严格控制。量纲分析将多个变量组合成无量纲的数学形式，不仅可以精确地预测参数以获得窄的尺寸可调性，而且可以保证合成的重现性。对微反应器合成的聚二甲基硅氧烷( PDMS )包复CdTe QDs进行分析、结构和光学表征，发现量子效率( 61.5 % )、光稳定性( 44 % )和5 ~ 15 nm的生物相容性纳米晶。进一步，PDMS包复的QDs ( P- QDs )与细胞器特异性抗体/生物标记物偶联，用于NIH 3T3细胞的体外成像。同样，增殖细胞核抗原( PCNA )和抗肌球蛋白( MF20 )、心肌细胞抗体分别与P- QDs (红色和绿色)结合，成像斑马鱼心肌组织。用量子点标记的抗体用共聚焦显微镜同时成像。因此，成功实现了体外和斑马鱼组织的多重生物成像。结果表明，连续流活性微反应器结合工艺参数的数学预测适合合成可再生单分散、量子高效的量子点。