Fig. 7: Optical responses of the sensors with various interfaces during monitoring of the photogenerated current of TiO2. | Light: Science & Applications

Fig. 7: Optical responses of the sensors with various interfaces during monitoring of the photogenerated current of TiO2.

From: Microscale insight into the proton concentration during electrolytic reaction via an optical microfiber: potential for microcurrent monitoring by a dielectric probe

Fig. 7

a Photogenerated current of TiO2. b Schematic diagram of optical fiber monitoring of the photogenerated current of TiO2. Inset: microscopic photo of the microfiber position. The microfiber was positioned at a distance of 204 μm from the counter electrode. (BBS broadband source, OSA optical spectrum analyzer, EW electrochemical workstation, CE counter electrode, RE reference electrode, WE working electrode). c pH changes at the counter electrode during the photocurrent generation process. Wavelength shifts and derivative of the wavelength shift with respect to time d(nm)/dt of the sensors with (d) GO-MoS2-Au, (e) GO-MoS2, (f) MoS2-GO, (g) MoS2, and (h) GO interfaces and (i) without an interface. j Wavelength shift decay with increasing number of illumination cycles of TiO2

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