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Application of the third biological window near-infrared light as an excitation light source for photothermal conversion

A technology of excitation light source and photothermal conversion, which is used in heat exchange materials, applications, and non-combustion exothermic chemical reactions to generate heat, etc., to achieve effective photothermal conversion, expansion of wavelength range, and good application prospects.

Active Publication Date: 2020-11-10
CAPITAL NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Application of the third biological window near-infrared light as an excitation light source for photothermal conversion
  • Application of the third biological window near-infrared light as an excitation light source for photothermal conversion
  • Application of the third biological window near-infrared light as an excitation light source for photothermal conversion

Examples

Experimental program
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Embodiment 1

[0044] Example 1, the laser in the NIR III range is used as the excitation light source to excite the PDA-coated NaLuF 4 :Nd nanoparticles for photothermal conversion:

[0045] First, measure the PDA-coated NaLuF 4 : UV-Vis-NIR spectra of Nd nanoparticles and laser at 1470 nm wavelength (0.9W cm -2 ) irradiation, the temperature change was recorded for 5 minutes using a photothermographic analysis system.

[0046] figure 1 NaLuF coated for PDA 4 : Transmission electron micrographs of Nd nanoparticles, from figure 1 Known: NaLuF coated with PDA 4 : Nd nanoparticles are spherical, uniform in shape, and the particle size is 20-90nm; figure 2 NaLuF coated for PDA 4 : UV-Vis-NIR spectra of Nd nanoparticles, from figure 2 It can be known that: PDA-coated NaLuF 4 : Nd nanoparticles have obvious absorption at 1470nm; image 3 NaLuF coated for PDA 4 : The aqueous dispersion of Nd nanoparticles (concentration is 1mg / ml) is lasered at 1470nm wavelength (0.9W cm -2 ) tempera...

Embodiment 2

[0047] Embodiment 2, the laser in the range of NIR III is used as the excitation light source to excite PEDOT nanoparticles for photothermal conversion:

[0048] First, the UV-Vis-NIR spectrum of PEDOT nanoparticles was measured and the laser at a wavelength of 1470nm (0.9W cm -2 ) irradiation, the temperature change was recorded for 5 minutes using a photothermographic analysis system.

[0049] Figure 4 is a transmission electron micrograph of PEDOT nanoparticles, from Figure 4 It can be seen that: PEDOT nanoparticles are spherical, uniform in shape, and the particle size is about 20nm; Figure 5 UV-Vis-NIR spectra of PEDOT nanoparticles, from Figure 5 It can be known that: PEDOT nanoparticles have obvious absorption at 1470nm; Figure 6 A laser (0.9W cm -2 ) temperature change under irradiation, from Figure 6 It can be known that the laser (0.9W cm -2 ) irradiation, the temperature can rise by about 4 °C within 5 minutes, thus realizing the photothermal conversion...

Embodiment 3

[0050] Example 3, the laser in the NIR III range is used as the excitation light source to excite the PPy-coated Ag nanoparticles for photothermal conversion:

[0051] First, the UV-Vis-NIR spectra of PPy-coated Ag nanoparticles were measured and the laser at 1470 nm wavelength (0.9 W cm -2 ) irradiation, the temperature change was recorded for 5 minutes using a photothermographic analysis system.

[0052] Figure 7 Transmission electron micrographs of Ag nanoparticles coated with PPy, from Figure 7 It can be known that the Ag nanoparticles coated with PPy are polygonal, and the particle size is about 30-40nm; Figure 8 UV-Vis-NIR spectra of Ag nanoparticles coated with PPy, from Figure 8 It can be known that the Ag nanoparticles coated with PPy have obvious absorption at 1470nm; Figure 9 Laser (0.9W cm -2 ) temperature change under irradiation, from Figure 9 It can be known that the laser (0.9W cm -2 ) under irradiation, the temperature can rise by about 9°C within...

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Abstract

The invention discloses application of third biological window near-infrared light as a photo-thermal conversion excitation light source. A photo-thermal conversion method comprises the step that an excited material is excited with an excitation light source, wherein the wavelength of laser light emitted by the excitation light source is 1450-1870nm. The excited material contains a photo-thermal conversion material or is a material capable of absorbing exciting light with wavelength of 1450-1870nm and converting energy into thermal energy. The application of the NIRIII range laser as the photo-thermal conversion excitation light source is a novel photo-thermal conversion excitation method; the NIRIII range laser has a deeper penetration depth of biological tissues, can more effectively penetrate the biological tissues to realize photo-thermal conversion, and has a good application prospect in biological applications.

Description

technical field [0001] The invention belongs to the field of photothermal materials, and in particular relates to the application of a third biological window near-infrared light as an excitation light source for photothermal conversion. Background technique [0002] Photothermal conversion nanomaterials are functional materials that can absorb near-infrared light and generate heat through plasmon resonance or non-radiative transitions, and have great application potential in the field of biomedicine. However, light has a limited penetration depth due to absorption and scattering by biological fluids. Improving the penetration ability of light has become a research hotspot in the field of photothermal conversion. Compared with the traditional first (NIR I: 700-900nm) and second (NIR II: 1000-1400nm) biological window near-infrared light, the third biological window near-infrared light (NIRIII: 1450-1870nm) is scattered by biological fluids Less interference, with deeper bi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24V30/00C09K5/14
CPCC09K5/14
Inventor 周晶蒋安琪刘瑜鑫马李益
Owner CAPITAL NORMAL UNIVERSITY
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