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To date, few effective fluorescent biosensors based on RNA aptamers have been developed because the intrinsic instability of RNA in the presence of nucleases precludes the application of RNA aptamers for the analysis of biological fluids. In this study, we developed a simple, sensitive, selective turn-on fluorescent aptasensor for theophylline detection in serum, utilizing ligand-induced self-assembling...
In this article, we first report an ultralow temperature (−60°C) synthesis of graphene oxide nanosheets (GONs), which is achieved via the reduction reaction of tetrachloroethylene (C2Cl4) and potassium in liquid ammonia solution at atmospheric pressure. The as-obtained multilayer GONs with a high quality exhibit a low C/O atomic ratio of approximately 2:1, indicating that GONs are rich in the oxygen-containing...
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