No abstract

Significant multiplexing capacity of optical time-domain coding has been recently demonstrated by tuning luminescence lifetimes of the upconversion nanoparticles called ‘τ-Dots’. It provides a large dynamic range of lifetimes from microseconds to milliseconds, which allows creating large libraries of nanotags/microcarriers. However, a robust approach is required to rapidly and accurately measure the luminescence lifetimes from the relatively slow-decaying signals. Here we show a fast algorithm suitable for the microsecond region with precision closely approaching the theoretical limit and compatible with the rapid scanning cytometry technique. We exploit this approach to further extend optical time-domain multiplexing to the downconversion luminescence, using luminescence microspheres wherein lifetimes are tuned through luminescence resonance energy transfer. We demonstrate real-time discrimination of these microspheres in the rapid scanning cytometry, and apply them to the multiplexed probing of pathogen DNA strands. Our results indicate that tunable luminescence lifetimes have considerable potential in high-throughput analytical sciences.

A series of inorganic–organic hybrid multifunctional crystalline materials constructed using double-tartaric bridging mono-lanthanide substituted phosphotungstates display reversible photochromic, switchable luminescence, and magnetic properties.

Figure 4. a)The CV curves of Zn@CuHCF//V 2 O 5 and bare Zn//V 2 O 5 full cells. b) The charging/discharging curves of Zn@CuHCF//V 2 O 5 cells. c) Rate performance. d) Cycling performance of full cells. e) Ragone plot of Zn@CuHCF//V 2 O 5 cell compared with previously reported AZIBs. [60][61][62][63][64][65][66] f) Schematic diagram of a flexible quasi-solid-state Zn@CuHCF//V 2 O 5 battery. g) The optical images of open circuit voltage of the flexible quasi-solid-state Zn@CuHCF//V 2 O 5 battery in various bending states. h) LED powered by two flexible quasi-solid-state Zn@CuHCF//V 2 O 5 batteries.

Eye-safe solid-state lasers that operate at 2 mm wavelength have many applications in medical, remote sensing and military technologies. With a 3-W CW laser-diode pumping, we obtained 760 mW 2.01 mm Tm:YAG laser under CW operation. The slope efficiency was 44% and the optical to optical efficiency reached 36%. In the acousto-optic Q-switched operation, laser pulses with the energy of 1.2mJ and 380 ns FWHM width have been achieved.