Dc2200 led driver

Absorbance was collected with a photodiode array Hewlett-Packard 8453 UV-vis spectrometer with Al₂O₃ scaffold and glass absorbance subtracted from all spectra. Steady-state PL measurements were taken using a home-built system. Samples were excited using a Thorlabs fiber-coupled 405 nm light-emitting diode (LED) pulsed at 10 Hz using a Thorlabs DC2200 LED driver. Visible detection was made using an Ocean Optics OceanFX spectrometer. Spectra were stitched using a LabVIEW program developed in-house. Detector calibration was done using an Ocean Optics HL-2000-HP blackbody lamp. Prior to data acquisition, the substrate was sealed into an air-tight optical holder filled with the desired RH. Optical measurements were collected on films prepared with a 326 ± 22 nm thick Al₂O₃ NP scaffold.

UV–vis spectra changes were recorded upon light irradiation at different time intervals, for which the alternating GL and BL irradiation sequence was controlled by a software package for DC2200 LED Driver (Thorlabs) automated with a mouse-action recorder (HiMacroEx, https://fefnirm.web.fc2.com/soft/himacroex/). During recording spectra, a solution of the photo-triggers (Azo-H, Azo-Me and Azo-F) in organic solvent was stirred with a teflon-coated magnetic chip in a quartz cuvette (1 cm × 1 cm, 800 rpm). For UV–vis spectra of the LC blend, [Azo-F], we used a temperature controller (monoOne-120, THREE HIGH) and a handmade hot stage.

We used a DC2200 LED Driver (ThorLabs) operating ThorLabs mounted LEDs for the light irradiation. The different ThorLab light sources we used are as follows: Royal Blue LED (M455L4), Deep Red LED (M660L4), Far Red LED (M730L5), and Infra-Red LED (M850L3). The light source calibration, and conversion from LED current input (from the driver controller) to light intensity output, was performed with the digital optical power and energy meter (PM100D, ThorLabs) combined with the slim photodiode power sensor (S130VC, ThorLabs). The distance between the OMIEC (or photodiode during calibration) and the light source was maintained at 1 cm throughout the study.