Fabrication of bistable switching device using CdS nanorods embedded in PMMA (polymethylmethacrylate) nanocomposite

Abstract

An organic bistable memory device was fabricated using CdS NR's/PMMA (polymethylmethacrylate) nanocomposite sandwiched between ITO and Al thin film. XRD analysis confirmed that CdS NR's reveals wurtzite hexagonal phase. FESEM and TEM images showed the monodispersed rod-like morphology. The nanorods were uniformly dispersed in the PMMA (polymethylmethacrylate) layer. EDX spectrum confirms that the product consists of only Cd and S elements. No other impurities were found. UVvisible absorption of CdS NR's showed a slight blue shift. The photoluminescence spectra of CdS NR's spectra showed surface defects which may be due to sulfur vacancies in surface of nanorods. The CdS NR's polymer nanocomposite showed better thermal stability. The current-voltage (C-V) measurement of ITO/CdS NR's/Al showed a clockwise hysteresis with flatband shift voltage in C-V curve for the device.

Visible Light-Driven Photocatalytic Rhodamine B Degradation Using CdS Nanorods

“…The XRD peak intensities of the CdS NRs differ from the bulk material. It is noted that XRD peak intensity at 26.67 • corresponding to (002) facet of CdS, is much more intense with a small width than all the other peaks, indicating the orientation growth of the nanorods along the c-axis [35], in agreement with FESEM results. Moreover, the XRD pattern of the as-synthesized CdS NRs did not show any peaks except for CdS, which confirms the high purity of the catalyst.…”