37results about How to "Wide absorption wavelength range" patented technology

The invention discloses application of rhodamine B-based fluorescence sensor. The sensor is benzyl 3-(3',6'-bi(diethylamino)-3-oxohelix[isoindolinyl-1,9'-xanthene]-2-yl) ethyl propionate which can specially detect tin ions. The benzyl 3-(3',6'-bi(diethylamino)-3-oxohelix[isoindolinyl-1,9'-xanthene]-2-yl) ethyl propionate serves as a substrate, then MgCl2.6H2O, SnCl2.H2O, CrCl3.6H2O, AgNO3, CaCl2, NaCl, PbCl2, KCl, MnCl2.4H2O, ZnCl2, CuCl2.2H2O, LiCl.H2O, Ba(NO3)2, HgCl2, CoCl2, FeCl2.4H2O, FeCl3.6H2O, CdCl2.2.5H2O, AlCl3 and other different heavy metal ions are added, and fluorescent response occurs only when the SnCl2.H2O is added, so that the fluorescence sensor for specially detecting the tin ions is developed. The sensor has the advantages of high specificity, high sensitivity and the like and has important application potentials in the aspects of disease diagnosis and health evaluation.

The invention discloses an active and passive hybrid mode-locked optical fiber laser with a temperature compensation function, and belongs to the technical field of optical communication devices. The main structure comprises an active mode-locked optical fiber layer resonant cavity, a temperature compensation system, a passive mode-locked optical fiber laser system and a pulse optimizing system, wherein the active mode-locked optical fiber layer resonant cavity is formed by a pumping light source (1), a wavelength-division multiplexer (2), a first optical coupler (3), an adjustable optical fiber filter (4); the temperature compensation system is formed by absolute ethyl alcohol filled photonic crystal fiber (27), a third optical probe (28) and a second amplifying circuit (29); the passive mode-locked optical fiber laser system is formed by dispersion compensation optical fiber (22) and a black phosphorus saturable absorber (21); the pulse optimizing system is formed by two feedback control rings. Active and passive hybrid mode locking is adopted, a feedback technology is used for conducting automatic feedback control over active and passive hybrid mode-locked optical fiber laser systems, the optical fiber laser has the temperature compensation function, and optical pulses in the system can be optimized better and stable.

The invention discloses a photocatalyst La 2 (WO 4 ) 3 The photocatalyst uses sodium tungstate and lanthanum chloride as raw materials, reacts in an aqueous solution to obtain a colloidal precursor, and then undergoes precipitation, washing, drying, grinding and roasting. The photocatalyst has a fluffy snowflake shape, with an average particle size of about 1-2.5 μm, which greatly increases its specific surface area, thereby increasing the contact area and reaction area with rosebic acid, and providing more surface active sites. It is beneficial to the degradation of rosebic acid and the absorption and utilization of light, and the photocatalyst La 2 (WO 4 ) 3 La in has 5d 1 6f 2 The electronic structure makes the photocatalyst absorb light in a wide range of wavelengths. Under the irradiation of ultraviolet light and visible light, it has good catalytic effect and photocatalytic activity on rosebic acid. Therefore, the present invention has great potential applications in the field of water pollution treatment .

The invention belongs to the field of materials and bioengineering, and relates to a manufacturing method and application of a nano-titanium dioxide-biological protein composite membrane electrode. In this method, nano-TiO was first prepared by electrodeposition 2 A porous film electrode, and then use the electrode to adsorb and fix biological proteins to obtain a nano-titanium dioxide-biological protein composite membrane electrode. The electrodeposited titanium dioxide film electrode prepared by the invention has good light transmittance, uniformity and stability, and provides a good basis for adsorption and fixation of biomolecules. The titanium dioxide-biological protein film electrode prepared by the invention can fully and effectively broaden the absorption wavelength range of light, and provides a reference for the research of biological photoelectric devices. Applying the invention to the manufacture of devices such as solar cells and light-controlled switches can increase sensitivity, greatly improve photoelectric conversion efficiency, and play the role of energy saving and high efficiency.