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Patent
CAS Technical Institute of Physics and Chemistry | Date: 2015-04-09

The present invention discloses an anti-ultraviolet flaky cellulose material which is characterized in that the cellulose material has a flaky morphology, a particle width of 5-200 m and a thickness of 0.01-10 m, and the flaky cellulose material can block transmission of ultraviolet ray within the range of UVA (320-400 nm) and UVB (280-320 nm). Meanwhile, the present invention also provides a preparation method of the flaky cellulose material and a use thereof.


Patent
CAS Technical Institute of Physics and Chemistry | Date: 2017-02-15

The present invention discloses an anti-ultraviolet flaky cellulose material which is characterized in that the cellulose material has a flaky morphology, a particle width of 5-200 m and a thickness of 0.01-10 m, and the flaky cellulose material can block transmission of ultraviolet ray within the range of UVA (320-400 nm) and UVB (280-320 nm). Meanwhile, the present invention also provides a preparation method of the flaky cellulose material and a use thereof.


Tang F.,CAS Technical Institute of Physics and Chemistry | Li L.,CAS Technical Institute of Physics and Chemistry | Chen D.,Beijing Creative Nanophase Hi Technology Company
Advanced Materials | Year: 2012

In the past decade, mesoporous silica nanoparticles (MSNs) have attracted more and more attention for their potential biomedical applications. With their tailored mesoporous structure and high surface area, MSNs as drug delivery systems (DDSs) show significant advantages over traditional drug nanocarriers. In this review, we overview the recent progress in the synthesis of MSNs for drug delivery applications. First, we provide an overview of synthesis strategies for fabricating ordered MSNs and hollow/rattle-type MSNs. Then, the in vitro and in vivo biocompatibility and biotranslocation of MSNs are discussed in relation to their chemophysical properties including particle size, surface properties, shape, and structure. The review also highlights the significant achievements in drug delivery using mesoporous silica nanoparticles and their multifunctional counterparts as drug carriers. In particular, the biological barriers for nano-based targeted cancer therapy and MSN-based targeting strategies are discussed. We conclude with our personal perspectives on the directions in which future work in this field might be focused. Mesoporous silica nanoparticles (MSNs) are drawing growing attention for their biomedical applications. With unique mesoporous structure, high surface area and low toxicity, MSNs exhibit super performance as versatile drug delivery systems especially for cancer therapy. This review focuses on recent progresses of synthesis strategies, biocompatibility research and drug delivery application of MSNs. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Yao L.,CAS Technical Institute of Physics and Chemistry | Yao L.,University of Chinese Academy of Sciences | He J.,CAS Technical Institute of Physics and Chemistry
Progress in Materials Science | Year: 2014

Recently, antireflective coatings (ARCs) with self-cleaning properties have attracted significant attention for both their fundamental aspects and wide practical applications. In the current review, the basic principles of antireflection and self-cleaning are briefly discussed first. Then, fabrication strategies with particular emphasis on silicon and silica substrates are reviewed in detail. Meanwhile, ARCs and self-cleaning coatings on polymer and metal foil are also briefly described. Afterwards, progresses in antireflective self-cleaning coatings and some multifunctional ARCs in the latest five years are presented in detail. The applications of ARCs are discussed in terms of architectural glasses, solar collectors, photovoltaic modules, and display devices. Finally, current challenges faced in practical applications and the trend of future development are presented and discussed to facilitate a universal understanding of ARCs and self-cleaning coatings. © 2013 Elsevier Ltd. All rights reserved.


Patent
CAS Technical Institute of Physics and Chemistry | Date: 2015-09-23

Disclosed is a surface plasmon resonance sensor chip, comprising a glass substrate layer, a gold film layer and a probe molecule layer. The gold film layer is disposed on the glass substrate layer and the probe molecule layer is disposed on the gold film layer. Also disclosed is a method for preparing the surface plasmon resonance sensor chip. By means of a surface plasmon resonance spectrum generated by the surface of the gold film disposed on the glass substrate, the content of lipopolysaccharide in an aqueous solution is detected in a fast, simple, quantitative and ultra-sensitive way.


Patent
CAS Technical Institute of Physics and Chemistry | Date: 2013-07-31

A laser micro/nano processing system (100, 200, 300, 400) comprises: a laser light source used to provide a first laser beam having a first wavelength and a second laser beam having a second wavelength different from the first wavelength, with the pulse width of the first laser beam being in the range from a nanosecond to a femtosecond; an optical focusing assembly used to focus the first laser beam and the second laser beam to the same focal point; and a micro mobile platform (21) controlled by a computer. Also disclosed are a method for micro/nano-processing photosensitive materials with a laser and a method for fabricating a device with a micro/nano structure using laser two-photon direct writing technology. In the system and methods, spatial and temporal overlapping of two laser beams is utilized, so as to obtain a micro/nano structure with a processing resolution higher than that of a single laser beam, using an average power lower than that of a single laser beam.


Patent
CAS Technical Institute of Physics and Chemistry | Date: 2014-10-08

Disclosed is a method for preparing stably dispersed cellulose nanofibers. The method comprises following steps: 1) mixing cellulose and an organic solvent, the percentage of the cellulose being 1% to 15% in weight; 2) adding an esterification agent into the resultant mixture of step 1), the molar ratio of the esterification agent to the cellulose being from 1: 0.1 to 4; 3) physically breaking the resultant mixture of step 2) until a suspension liquid with stably dispersed cellulose nanofibers of 2-1000 nm in diameter and 100-100 m in length is obtained, an esterification reaction of hydroxyl group(s) on the surface of cellulose fibers being occurring at the meantime of the breaking. Since the surface of the cellulose nanofibers with the esterified surface is hydrophobized by alkyl molecular chains, the dispersant solvent may be DMF, or may be replaced by other solvents. Moreover, when recombining the cellulose nanofibers of the invention with the synthetic resins, compatibility of the cellulose nanofibers to the matrix is better than that of the untreated cellulose, and thus the strength of the composite material may be improved.


Patent
CAS Technical Institute of Physics and Chemistry | Date: 2015-06-17

The present invention discloses a method for preparing heteroatom doped carbon quantum dot, and application thereof in fields of biomedicine, catalysts, photoelectric devices, etc. The various kinds of heteroatom doped carbon quantum dots are obtained by using a conjugated polymer as a precursor and through a process of high temperature carbonization. These carbon quantum dots contain one or more heteroatoms selected from the group consisting of N, S, Si, Se, P, As, Ge, Gd, B, Sb and Te, the absorption spectrum of which ranges from 300 to 850 nm, and the fluorescence emission wavelength of which is within a range of 350 to 1000 nm. The carbon quantum dot has a broad application prospect in serving as a new type photosensitizer, preparing drugs for photodynamic therapy of cancer and sterilization, photocatalytic degradation of organic pollutants, photocatalytic water-splitting for hydrogen generation, organic polymer solar cell and quantum dot-sensitized solar cell.


Patent
CAS Technical Institute of Physics and Chemistry | Date: 2015-01-14

Provided is a polymer micro-needle array chip comprising a micro-needle array and a substrate on which the micro-needle array is placed; a polyacrylamide polymer with a molecular weight of 1.0x10^(4)-2.0x10^(5), Vickers hardness of 150-600 HV and impact strength of 5-30 J/m is used as the material of the micro-needle array. The polymer micro-needle array chip has high mechanical strength and a sharp needle tip; and it can easily be dissolved or can swell on contact with a water-containing environment, which helps the drug to be released slowly in the skin.


Patent
CAS Technical Institute of Physics and Chemistry | Date: 2015-11-03

A laser micro/nano processing system (100, 200, 300, 400) comprises: a laser light source used to provide a first laser beam having a first wavelength and a second laser beam having a second wavelength different from the first wavelength, with the pulse width of the first laser beam being in the range from a nanosecond to a femtosecond; an optical focusing assembly used to focus the first laser beam and the second laser beam to the same focal point; and a micro mobile platform (21) controlled by a computer. Also disclosed are a method for micro/nano-processing photosensitive materials with a laser and a method for fabricating a device with a micro/nano structure using laser two-photon direct writing technology. In the system and methods, spatial and temporal overlapping of two laser beams is utilized, so as to obtain a micro/nano structure with a processing resolution higher than that of a single laser beam, using an average power lower than that of a single laser beam.

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