Nanoscale Research Letters 2011, 6:210.CrossRef 48. Lin Y, Koga T, Nitta J: Effect of an InP/In 0.53 Ga 0.47 As interface on spin-orbit interaction in In 0.52 Al 0.48 As/In 0.53 Ga 0.47 As heterostructures . Phys Rev B 2005, 71:045328.CrossRef Apoptosis antagonist Competing interests The authors declare that they have no competing interests. Authors’ contributions JY conducted the experiments and wrote the paper. YC designed the experiments and performed the sample fabrications. SC, YL, and QZ assisted with the measurements and analysis. All authors contributed through scientific discussions and read and approved the final manuscript.”
“Background Organic electrically bistable devices

have aroused extensive interests due to their unique advantages such as simple-fabrication process, large memory density, and lower power consumption [1–3]. A wide variety of materials, including conjugated polymers, small organic molecules and inorganic nanocrystals, have been applied to obtain better device performance [4–6]. Among different candidates for electrically bistable devices, colloidal inorganic nanocrystals have been studied extensively due to their unique chemical and physical properties. To date, some different types of inorganic nanocrystals, such as ZnO, Cu2S, and CdSe/ZnS have been embedded into polymers to fabricate electrically bistable devices,

which have exhibited clear check details electrical bistabilities [7–10]. These nanocrystals mentioned above, however, have their intrinsic defects, such as toxicity and instability, which limit their further applications [11, 12]. In the electrically bistable devices based on inorganic nanocrystals, NDR effects standing for the current decreasing with the increasing bias voltage have often been observed, which have aroused much attention since it is considered to be a key feature for their conduction system [13–15]. fantofarone As promising optoelectronic candidates, Ag2S nanocrystals have the advantages of

less toxic and good stability, which are still rarely seen in the reports of organic electrically bistable devices. In this letter, an electrically bistable device has been fabricated based on the composites containing ARS-1620 spherical Ag2S nanocrystals and PVK using a simple spin-coating method. Current–voltage (I-V) measurements as well as retention and reproducibility tests have demonstrated that the devices show good electrical bistability and stability. The NDR effects have been studied by applying different positive charging voltages and the charging time, which can be attributed to the charge trapping/detrapping process in the Ag2S nanocrystals. Moreover, the carrier transport mechanism has been described based on the I-V results. Methods The Ag2S colloidal nanocrystals used in this study were prepared according to our previous report [16].