Tetravalent chromium doped near infrared light-emitting temperature detecting nano material and preparation and application thereof

Abstract

The invention belongs to the technical field of near infrared nano fluorescent materials and discloses a tetravalent chromium doped near infrared light-emitting temperature detecting nano material anda preparation and an application thereof. According to the near infrared light-emitting temperature detecting nano material, a base material is Ca2Al2SiO7 doped with tetravalent chromium, wherein thedoping amount is 0.1-2mole% the base material. The preparation method comprises the following steps: (1) mixing calcium nitrite, aluminum nitrate, chromic nitrate and silicic acid in water accordingto a stoichiometric ratio and the doping amount to obtain a mixture solution; and (2) under a stirring condition, dropwise adding hydrogen peroxide into the mixture solution at 80-100 DEG C, drying and grinding the mixture, and calcining the mixture in an aerobic environment to obtain the near infrared light-emitting temperature detecting nano material. The exciting and emitting bands of the nanomaterial are located in a biological transmitting window, can increase the signal-to-noise ratio and the resolution and deepen the depth of penetration, and have relatively high thermal sensitivity. The nano material is used in the field of near infrared light-emitting temperature detection.

Description

technical field [0001] The invention belongs to the technical field of near-infrared nano-fluorescent materials, and relates to a tetravalent chromium-doped near-infrared luminous temperature detection nano-material and its preparation and application, in particular to a Cr 4+ Ion-activated calcium aluminum silicate near-infrared luminescence temperature detection nanoparticle material and its preparation method and application. Background technique [0002] Remote all-optical temperature detection has important applications in the biomedical field. Among the many approaches to achieve remote optical thermal control, luminescent nanothermography is rapidly expanding and raises the possibility of non-contact detection of thermal sensation with very good spatial and thermal resolution, and thus can be used as a clinical cancer sensor. Early detector, detection of stroke or inflammatory processes and much more. The key to luminescent nanothermometrics is luminescent nanoparti...

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Problems solved by technology

[0003] However, upconversion nanothermometers including quantum dots, carbon dots, heavy metal nanoparticles, and doped lanthanides still cannot satisfactorily meet the requirements of broadband near-infrared nanoscale temperature detection, and most of them have several disadvantages as follows: Noise ratio, shallow penetration depth, low resolution, high manufacturing cost, working area does not fall in the broad excitation band of biological transmission window, or does not have high thermal sensitivity, etc., hardly suitable for biological transmission window Therefore, the development of high-sensitivity near-infrared luminescent temperature detection nanoparticle materials can further promote the development of this field.

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