Abstract: The present disclosure provides an oral care composition and a preparation method, and an application thereof. The composition includes: a drug-loaded micelle, wherein the drug-loaded micelle includes a polymer micelle and an enamel restoration drug physically wrapped in the polymer micelle, and the polymer micelle is micelle particles formed by a water-soluble polymer with a structure shown by Formula I in an aqueous solution with presence of tannic acid and the micelle particles have a shell connected to a salivary protein polypeptide through chemical bonds. The oral care composition in the present disclosure enables the salivary protein polypeptide to adhere to the surfaces of teeth so as to open the borate ester bond between the tannic acid and the water-soluble polymer in an acidic environment generated by the dental caries and release the tannic acid and sodium fluoride, thus achieving the purpose of preventing dental caries and restoring tooth defects.

Abstract: In various aspects, the present disclosure provides photodetector devices that may be provided in arrays. The photodetector includes a first electrode, a second electrode, and a photoactive layer assembly disposed therebetween. The photoactive layer assembly comprises a first charge transport layer, a second charge transport layer, and an amorphous silicon (a-Si) material substantially free of doping and being substantially free of doping disposed between the first charge transport layer and the second charge transport layer. The photodetector device transmits light in a predetermined range of wavelengths and is capable of generating detectable photocurrent when light having a light intensity of less than or equal to about 50 Lux is directed towards the photodetector device.

Abstract: The present disclosure provides an oral care composition and a preparation method, and an application thereof. The composition includes: a drug-loaded micelle, wherein the drug-loaded micelle includes a polymer micelle and an enamel restoration drug physically wrapped in the polymer micelle, and the polymer micelle is micelle particles formed by a water-soluble polymer with a structure shown by Formula I in an aqueous solution with presence of tannic acid and the micelle particles have a shell connected to a salivary protein polypeptide through chemical bonds. The oral care composition in the present disclosure enables the salivary protein polypeptide to adhere to the surfaces of teeth so as to open the borate ester bond between the tannic acid and the water-soluble polymer in an acidic environment generated by the dental caries and release the tannic acid and sodium fluoride, thus achieving the purpose of preventing dental caries and restoring tooth defects.

Abstract: A terahertz spectrum test device and system includes a femtosecond fiber laser configured to generate a pump light and a probe light. The pump light excites a terahertz transmitter to generate terahertz waves which are transmitted to a sample suspension device to irradiate a suspended to-be-tested sample, and the probe light is directly transmitted to a terahertz detector. The terahertz detector receives the terahertz waves transmitted from the sample suspension device, and then transmits the terahertz waves and the probe light together to a signal processing circuit to obtain a corresponding terahertz time-domain spectrum. By adoption of the terahertz spectrum test device and system, the to-be-tested sample need not be fixed with a clamp or other instruments, so that terahertz waves will not irradiate to the instrument used for fixing the to-be-tested sample during a terahertz spectrum test, which may otherwise affect the test result.

Abstract: A terahertz spectrum test device and system includes a femtosecond fiber laser configured to generate a pump light and a probe light. The pump light excites a terahertz transmitter to generate terahertz waves which are transmitted to a sample suspension device to irradiate a suspended to-be-tested sample, and the probe light is directly transmitted to a terahertz detector. The terahertz detector receives the terahertz waves transmitted from the sample suspension device, and then transmits the terahertz waves and the probe light together to a signal processing circuit to obtain a corresponding terahertz time-domain spectrum. By adoption of the terahertz spectrum test device and system, the to-be-tested sample need not be fixed with a clamp or other instruments, so that terahertz waves will not irradiate to the instrument used for fixing the to-be-tested sample during a terahertz spectrum test, which may otherwise affect the test result.

Abstract: An air duct includes a base and a latching portion extending from the base. The base includes a resilient portion and two blocking plates. The latching portion is configured to receive a fan. The resilient portion is elastic deformable to fasten the base to the fan. The latching portion defines a ventilation hole for air flowing through in a first direction. The two blocking plates are configured to prevent the air from flowing back to the ventilation hole in a second direction opposite to the first direction. A cooling module with the air duct and an electronic device with the air duct are further disclosed.

Abstract: An electronic device enclosure includes a side plate and a strengthening plate. The side plate includes a main body, a first mounting flange extending from a first edge of the main body, and a second mounting flange extending from a second edge of the main body. The first mounting flange defines a first clipping hole, and the second mounting flange defines a second clipping hole. The strengthening plate includes a first securing flange and a second securing flange. The first securing flange includes a first clamping portion. The second securing flange includes a second clamping portion. The strengthening plate is moveable in a first direction that is substantially perpendicular to the main body, to engage the first clamping in the first clipping hole; and the strengthening plate is rotatable about an axis, to engage the second clamping portion in the second clipping hole.

Abstract: Embodiments of the present application disclose a waveguide conversion device. The waveguide conversion device includes: a multi-layer circuit board; and a waveguide cavity and a metal reflection cavity, located at two lateral sides of the multi-layer circuit board. The waveguide cavity and the metal reflection cavity are embedded in the multi-layer circuit board. The multi-layer circuit board is disposed with a micro strip line or a strip line and a match patch connected to the micro strip line or the strip line. The match patch is located in the waveguide cavity.