SNR-enhanced temperature-insensitive microfiber humidity sensor based on upconversion nanoparticles and cellulose liquid crystal coating

Phase-transition microcavity laser

“…The exceptional tunability enables a wide range of applications of LC microlasers in tunable light sources, [28][29][30] light field modulation, [31][32][33] and laser display. 34,35 The stimulus-response allows LC microlasers for high-performance sensing of temperature 36,37 and humidity, 38 as well as biomolecules 39,40 and ions. 41,42 In these applications, the LC microlasers are tuned generally by changing the orientation of LC molecules within a specific phase.…”

Microwave synthesis of upconverting nanoparticles with bis(2-ethylhexyl) adipate

“…Currently, research and industrial UCNP applications encompass areas as diverse as solar energy harvesting, 2 photocatalysis, 3 NIR-responsive drug delivery systems, 4 photodynamic therapy, 5 multimodal biological imaging, 6–8 and sensing physical and chemical stimuli. 9–12…”

“…Currently, research and industrial UCNP applications encompass areas as diverse as solar energy harvesting, 2 photocatalysis, 3 NIR-responsive drug delivery systems, 4 photodynamic therapy, 5 multimodal biological imaging, [6][7][8] and sensing physical and chemical stimuli. [9][10][11][12] Since the physicochemical properties of UCNPs correlate with their geometrical parameters, well-dened nanoparticle characteristics such as size, shape, and crystallographic phase are crucial for achieving high luminescence efficiency and application performance. 13 Although great effort has been made into developing effective nanocrystal synthesis methods, [14][15][16] there is still a need for improved approaches that can consistently deliver well-dened particles while being feasible from the research to the pilot and industrial scales towards future applications.…”

Phase-Transition Microcavity Laser

“…The exceptional tunability enables a wide range of applications of LC microlasers in tunable light sources, 28−30 light field modulation, 31−33 and laser display. 34,35 The stimulus-response allows LC microlasers for high-performance sensing of temperature 36,37 and humidity 38 as well as biomolecules 39,40 and ions. 41,42 In these applications, the LC microlasers are tuned generally by changing the orientation of the LC molecules within a specific phase.…”

“…Liquid crystal (LC) has been recently introduced into optical microcavities, creating new opportunities for tunable lasers and high-performance sensors. − The long-range order and the fluid nature of LC molecules lead to their unique properties that are not presented in any other material. The exceptional tunability enables a wide range of applications of LC microlasers in tunable light sources, − light field modulation, − and laser display. , The stimulus-response allows LC microlasers for high-performance sensing of temperature , and humidity as well as biomolecules , and ions. , In these applications, the LC microlasers are tuned generally by changing the orientation of the LC molecules within a specific phase. Theoretically, LC microlasers operated in the vicinity of the phase transition are expected to enhance significantly their tunability and sensitivity, , but this has yet to be demonstrated experimentally.…”