Exciton tuning in monolayer WSe substrate induced electron doping.

We report large exciton tuning in WSe monolayers substrate induced non-degenerate doping. We observe a redshift of ∼62 meV for the A exciton together with a 1-2 orders of magnitude photoluminescence (PL) quenching when the monolayer WSe is brought in contact with highly oriented pyrolytic graphite (HOPG) compared to dielectric substrates such as hBN and SiO. As the evidence of doping from HOPG to WSe, a drastic increase of the intensity ratio of trions to neutral excitons was observed.

Biomedical Diagnostics Enabled by Integrated Organic and Printed Electronics.

Organic and printed electronics integration has the potential to revolutionize many technologies, including biomedical diagnostics. This work demonstrates the successful integration of multiple printed electronic functionalities into a single device capable of the measurement of hydrogen peroxide and total cholesterol. The single-use device employed printed electrochemical sensors for hydrogen peroxide electroreduction integrated with printed electrochromic display and battery.