AgNWs-PDMS composite flexible conductive optical fiber micro lens and preparation method thereof

Abstract

The invention discloses an AgNWs-PDMS composite flexible conductive optical fiber micro lens and a preparation method thereof. The preparation method comprises the following steps that a PDMS precursor solution is sucked into a sleeve pipe and taken out after curing, the tail end of a PDMS fiber core is cut into a flat end surface, the PDMS fiber core is immersed into a PDMS solution, concentrically rotating is conducted after taking out, and curing is conducted to obtain a micro lens; one end, provided with the micro lens, of the PDMS optical fiber is coated with an ultraviolet curing adhesive and adhered to a quartz optical fiber; a PDMS optical fiber micro lens is immersed into the PDMS precursor solution, concentrically rotating is conducted after taking out, then heating is conducted,and the PDMS optical fiber micro lens is taken out and immersed into an AgNWs isopropanol solution to prepare an AgNWs conductive layer; the micro lens is immersed into a PDMS solution, concentrically rotating is conducted after taking out, and curing is conducted to prepare an insulating layer; and the micro-lens is soaked in ethanol, and the ultraviolet curing adhesive is stripped to expose theconductive layer and the micro-lens. The provided micro lens is good in conductivity and light guide performance, and the micro lens at the tail end of the optical fiber has a focusing function.

Description

technical field [0001] The invention relates to the medical field, in particular to an AgNWs-PDMS composite flexible conductive optical fiber microlens and a preparation method thereof. Background technique [0002] Biological neuron activity signals can be monitored by electrophysiological recording and optical imaging, and neuron activity can also be regulated by electrical stimulation and optical genetics. The traditional electrodes used for electrophysiological recording and electrical stimulation are mostly metal electrodes, such as Ag / AgCl electrodes, and the implantable optical fibers used for optical genetics and optical imaging are mostly quartz optical fibers and quartz optical fiber microlenses. The Young’s modulus of these materials It is seven to eight orders of magnitude higher than that of biological tissue, and its biocompatibility is poor. After implantation into a living body, it will often cause a strong foreign body reaction, which is not conducive to the...

AI Technical Summary

Problems solved by technology

[0004] At present, there are conductive optical fibers prepared by combining PDMS and conductive hydrogel, but the resistivity of the conductive hydrogel is high and the prepared PDMS optical fiber does not have a complete core-clad fiber waveguide structure, and its electrical and optical properties are poor. (Zhao Y, Wang K, Li S, et al.Polydimethylsiloxane(PDMS)-Based Flexible Optical Electrodes with Conductive Composite Hydrogels Integrated Probe for Optogenetics[J].Journal of Biomedical Nanotechnology,2018,14(6):1099-1106)

Images