No abstract

A ‘turn‐on’ fluorescence method for detection of hydrogen peroxide (H2O2) in marine food samples is presented in this article. Using this method, a carbon dots (CDs)–MnO2 probe was formed in which fluorescence intensity (FI) of CDs was quenched through fluorescence resonance energy transfer by addition of MnO2 nanosheets. When H2O2 was added into the CDs–MnO2 solution, the MnO2 nanosheets formed Mn2+ ions due to a redox reaction between H2O2 and MnO2 nanosheets, and CD FI was recovered. Under optimized conditions, the detection limit for H2O2 was 0.87 μM, and analytical linear range was 4–100 μM. Furthermore, this developed fluorescence sensing system was successfully used with satisfactory results to determine trace H2O2 content in marine food samples.

Due to their unique optical property, low toxicity, high hydrophilicity, and low cost, sulfur quantum dots (SQDs), an emerging luminescent nanomaterial, have shown great potential in various application fields, such as sensing, bioimaging, light emitting diode, catalysis, and anti-bacteria. This minireview updates the synthetic methods and sensing/bioimaging applications of SQDs in the last few years, followed by discussion of the potential challenges and prospects in their synthesis and sensing/bioimaging applications, with the purpose to provide some useful information for researchers in this field.

No abstract

Alkaline phosphatase (ALP), one of vital biomarkers in several diseases, plays a role in indicating disease presence or severity in early diagnosis. Here, a simple H2O2 assisted top-down method was...