32results about How to "Efficient light-to-heat conversion efficiency" patented technology

The invention belongs to the technical field of nano biomedical imaging, and relates to a near infrared two-zone imaging contrast agent, and a preparation method and an application thereof. The contrast agent is self-assembled by a three-block polymer, and three blocks comprise an intermediate diketopyrrolopyrrole-thiophene polymer chain segment and poly(ethylene glycol)acrylate polymer chain segments on both sides. The polymer has near-infrared two-zone imaging effect and can be used as the contrast agent to realize near-infrared two-zone imaging and photothermal therapy of tumor. Compared with a conventional near-infrared two-zone imaging contrast agent, the prepared near-infrared two-zone imaging contrast agent has higher water solubility, fluorescence quantum efficiency and imaging penetration depth, and becomes a promising photothermal agent for cancer treatment due to high-efficiency photothermal conversion efficiency.

The invention provides a cell membrane coated Au-Fe 3 o 4 The targeted nanomaterial and its preparation method and application belong to the technical field of targeted nanomaterials. Targeted nanomaterial cancer cell membrane provided by the present invention and Au-Fe wrapped in the cancer cell membrane 3 o 4 Nanoparticles, tannic acid and phorbol 12‑myristate 13‑acetate. PMA can effectively stimulate cells to produce H 2 o 2 and reactive oxygen species 2 ‑ , can suppress the insufficient H in cancer cells 2 o 2 Supplement to supplement raw materials for Fenton reaction; Fe 3 o 4 Can be partially decomposed in the presence of tannic acid to form Fe 2+ and Fe 3+ , Fe 2+ Can catalyze H in cancer cells 2 o 2 Decomposed into hydroxyl radicals, TA can promote Fe 3 o 4 Produced Fe 3+ to Fe 2+ Rapid transformation; at the same time, Au and Fe 3 o 4 It has good photothermal conversion efficiency and can give full play to the therapeutic effect of PTT.

The invention discloses a ferric oxide / bismuth sulfide nanocomposite material and its preparation. The preparation method is: the Fe 3 O 4 and dopamine are dispersed in Tris-HCl buffer solution to obtain Fe 3 O 4 @PDA nanoparticles; the bismuth source was dispersed in the solvent and then added dropwise to the bovine serum albumin solution to obtain BSA‑Bi 2 S 3 particles; Fe 3 O 4 @PDA nanoparticles dispersed into Na 2 HPO 4 ‑NaH 2 PO 4 buffer solution, add BSA‑Bi 2 S 3 particles, to obtain Fe 3 O 4 @PDA@BSA‑Bi 2 S 3 nanoparticles. The product obtained by the invention is easy to prepare and non-toxic, and has good biocompatibility, colloid stability and MRI&CT contrast effect at the level of cells and animals.

The invention discloses a polysiloxane aerogel composite material for efficient water evaporation. The polysiloxane aerogel composite material uses cerium-doped nano-powder as supporting powder and hydrophilic polysiloxane aerogel as a supporting carrier, and a cerium-doped nano-powder is an efficient photothermal conversion material. The hydrophilically modified polysiloxane aerogel has unique structural characteristics, substrate loading can be easily realized, meanwhile, the aerogel has the advantages that the thermal conductivity is low and a 3D porous structure is realized and the salt are not prone to being enriched and crystallized, the rapid passing of water vapor is realized, and the characteristics of efficient light absorption, light conversion, water transport and water evaporation are achieved. The invention further discloses a preparation method of the polysiloxane aerogel composite material for efficient water evaporation and application of the material in seawater desalination or industrial sewage treatment.

The invention discloses a preparation method of a graphene / nanofiber hybrid gel film with light-to-heat conversion function, which relates to a preparation method of the graphene / nanofiber hybrid gel film. The invention aims to solve the problems of low evaporation speed and low photothermal conversion efficiency of existing photothermal conversion materials in the seawater desalination process. Preparation method: 1. preparation of gel fiber; 2. preparation of graphene oxide sheet; 3. preparation of hybrid gel film. The invention is used for the preparation of the graphene / nanofiber hybrid gel film with light-to-heat conversion function.

The invention discloses a synthesis method of rice-shaped liquid metal nanoparticles. The liquid metal is a gallium-indium eutectic. In the above synthesis method, melanin nanoparticles are used to stabilize the gallium-indium eutectic. Concentration≤0.25mg / mL, rice-shaped liquid metal nanoparticles were obtained. Rice-shaped liquid metal nanoparticles have high photothermal conversion efficiency and high photothermal stability, and are a better photothermal therapy material. The invention discloses rice-shaped liquid metal nanoparticles. The liquid metal nanoparticles are gallium indium eutectic nanoparticles, the surface of the gallium indium eutectic nanoparticles chelates melanin nanoparticles, and the aspect ratio of the liquid metal nanoparticles is 2:1. -3:1. Rice-shaped liquid metal nanoparticles have high photothermal conversion efficiency, good photothermal stability, high biocompatibility, and good tumor ablation effect, and can be used as photothermal therapy materials for photothermal therapy of tumors.

The invention discloses an NIR SERS probe including gold nanorods GNRs and a conductive polymer CP wrapping the surface of the gold nanorods GNRs. A stabilizer polyvinylpyrrolidone PVP can also be distributed on the surface of the conductive polymer CP. The probe has the advantages of low cost, simple preparation, low toxicity and stable structure, and has both imaging and therapeutic effects. The invention also discloses a preparation method of the NIR SERS probe; the preparation method has the advantage of concise process, low cost and high success rate. The invention further discloses applications of the NIR SERS probe in SERS imaging and preparation of a drug having a photothermal therapeutic effect.

The invention discloses a bionic bismuth nanoflower, a preparation method and application thereof, and belongs to the technical field of medicine. The biomimetic bismuth nanoflowers include cell membranes and bismuth nanoflowers, and the cell membrane is used as a shell to cover the surface of the bismuth nanoflowers. The biomimetic bismuth nanoflowers of the present invention not only have good biological safety and degradability in the physiological environment, but also have good NIR II photothermal conversion efficiency, radiotherapy sensitization and CT / PAI dual-mode imaging, and are integrated photothermal synergistic radiotherapy in A new integrated carrier for diagnosis and treatment.

The invention relates to a charred rice husk foam photothermal material and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps: adding 2 to 8 parts of charred rice husks by mass into 100 parts of de-ionized water by mass and uniformly mixing; adding 2 to 2.5 parts of sodium dodecyl benzenesulfonate by mass, 2 to 2.5 parts of dodecanol by mass and 2 to 2.5 parts of resin glue by mass; stirring for 10 to 20min under the conditions that the temperature is 40 to 60 DEG C and the rotary speed is 100 to 200r / min, so as to obtain a mixed solution; stirring the mixed solution for 15 to 20min under the condition that the rotary speed is 1500 to 2000r / min; then adding 3 to 12 parts of a binding agent by mass into the stirred mixed solution; continually stirring for 5 to 10min to obtain charred rice husk foam slurry; pouring and molding the charred rice husk foam slurry and freezing and drying for 6 to 12h; and drying for 18 to 24h under the condition that the temperature is 80 to 100 DEG C to prepare the charred rice husk foam photothermal material. The preparation method provided by the invention has a simple technology andlow cost; and the prepared charred rice husk foam photothermal material has high water evaporation efficiency and photothermal conversion efficiency.