CrossRef 16. Moharam MG, Gaylord TK: Rigorous coupled-wave analysis of planar-grating
diffraction. J Opt Soc Am 1981, 7:811–818.CrossRef 17. selleckchem NREL’s AM 1.5 standard data set. http://rredc.nrel.gov/solar/spectra/am1.5/ Competing interests The authors declare that they have no competing interests. Authors’ contributions CLT carried out the experimental work associated with the fabrication and characterization of the samples, analyzed the results, and prepared the manuscript. YMS and SJJ helped in the analysis of the results and preparation of the manuscript. KA helped prepare the manuscript. YTL developed the PLX4032 datasheet conceptual framework and supervised the whole project, including finalizing the manuscript. All authors read and approved the final manuscript.”
“Background Among the numerous chemical sensors, pH sensor is the major field of research area, which is one of the controlled parameter for the biochemical industrial processes. Lots of aspects have been identified to detect the hydrogen ions under different environment conditions. In development of solid state sensor, recent approaches are ISFET (ion-sensitive field effect transistor), LAPS (light addressable potentiometric sensor),
and capacitance-based Trametinib electrolyte insulator semiconductor (EIS) [1–4]. Among these developments, EIS has shown potential in terms of its simple structure, label-free detection, easy fabrication procedure, and cost effectiveness [5, 6]. In addition, nanoparticles have generated considerable Axenfeld syndrome interest as diagnostic tool because of their small sizes and comparatively higher surface area that leads to more interaction with ions in solution [7–10]. Semiconductor nanoparticles such as quantum dots (QDs) are one of the major candidates being studied for sensor development [11, 12]. The QDs are better than bare SiO2 sensing membrane because of their high surface area to volume ratio which gives the platform for controlled immobilization of the biomolecules. In addition, the QDs have been studied as fluorescent labels for bioimaging
as well as ionic probes to detect chemical ion concentration in electrolyte solution and immunosensor for cancer detection [13–16]. Long-term environmental stability for robust sensing device is still a major limitation due to environmental factors, such as exposure of reactive ions, humidity, and temperature; results in transformation of nanoparticles such as photooxidation or size change have been reported earlier [17–20]. The controlled distribution of QDs to prevent agglomeration on sensing surface is another important aspect for sensitivity enhancement as well as long-term stability of the device. Some protein-mediated approaches have been demonstrated for the controlled ordering of quantum dots array [21–23].