中国科学院机构知识库网格系统: 检索

Calcium deficiency in hydroxyapatite and its drug delivery applications 期刊论文 OAI收割
MICRO & NANO LETTERS, 2018, 卷号: 13, 期号: 4, 页码: 562-564
作者: Rajagopalan, Vijayaraghavan; Koppala, Sivasankar; Swamiappan, Sasikumar; Gangarajula, Yuvaraj; Xu, Lei

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收藏 | 浏览/下载：48/0 | 提交时间：2019/06/20

Calcium Compounds Bioceramics Drug Delivery Systems Drugs Nanoparticles Particle Size Nanofabrication Nanomedicine Fourier Transform Infrared Spectra Precipitation Calcination X-ray Diffraction Scanning Electron Microscopy X-ray Chemical Analysis Nanoporous Materials Porosity Drug Delivery Applications Calcium Deficient Hydroxyapatites Precipitation Method Calcined Samples Fourier Transformation Infrared Spectroscopy Powder X-ray Diffraction Scanning Electron Microscopy Energy-dispersive X-ray Spectroscopy Phase Purity Particle Size Particle Shape Hap Structure Ciprofloxacin Sustained Drug Release Phosphate Buffer Solution Porous Structure [Ca10-x(Po4)(6)(Oh)(2)]

In vivo theranostics with near-infrared-emitting carbon dots—highly efficient photothermal therapy based on passive targeting after intravenous administration 期刊论文 OAI收割
Bao et al. Light: Science & Applications, 2018, 卷号: 7, 期号: 1
作者: Bao, Xin; Yuan, Ye; Chen, Jingqin; Zhang, Bohan; Li, Di

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收藏 | 浏览/下载：26/0 | 提交时间：2019/09/17

Infrared devices Carbon Medical applications Nanostructured materials Photoacoustic effect Photoluminescence Tumors

Graphene Plasmonics for Terahertz to Mid-Infrared Applications 期刊论文 OAI收割
ACS NANO, 2014, 卷号: 8, 期号: 2, 页码: 1086-1101
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收藏 | 浏览/下载：42/0 | 提交时间：2016/05/16

graphene plasmonics terahertz mid-infrared damping applications metamaterials spectroscopy plasmonic devices plasmon-polaritons plasmon-phonon-polaritons

Study of horizontal shafting with spherical four-way structure (EI CONFERENCE) 会议论文 OAI收割
2012 International Conference on Optoelectronics and Microelectronics, ICOM 2012, August 23, 2012 - August 25, 2012, Changchun, China
作者: Yang L.; Yang L.

收藏 | 浏览/下载：31/0 | 提交时间：2013/03/25

Altazimuth photoelectric theodolite level shaft U-type and T-type structure but with the expanding field of applications of photoelectric theodolite the horizontal shaft structure occur great changes. For example in the marine environment shipboard conditions the instrument has a waterproof corrosion-resistant easy maintenance and other functions while carrier-based optoelectronic devices from a single visible television configure the development of integrated infrared system and ranging system as one of the single-station measurement system due to the spherical structure has sufficient internal space exactly adapted to this need. In this paper the horizontal axis of a spherical four-way structure. From aspects of the spherical four-way split in the form and shafting design and finite element analysis of the detailed design. A spherical four-way horizontal axis system diameter 550mm weight 19kg sphere in the 40kg load the maximum deformation of 3.3m fully meet the requirements. The shaft of the structure of the shaking is less than 2 arc seconds the vibration test the re-examination instrument accuracy change is less than 1 arc seconds. Verify that the structure is stable and reliable. 2012 IEEE.

pH-responsive drug delivery system based on luminescent CaF2:Ce3+/Tb3+-poly(acrylic acid) hybrid microspheres 期刊论文 OAI收割
biomaterials, 2012, 卷号: 33, 期号: 8, 页码: 2583-2592
Dai YL; Zhang CM; Cheng ZY; Ma PA; Li CX; Kang XJ; Yang DM; Lin J

收藏 | 浏览/下载：24/0 | 提交时间：2013/06/08

MESOPOROUS SILICA NANOSPHERES INFRARED UP-CONVERSION BIOMEDICAL APPLICATIONS HYDROTHERMAL SYNTHESIS FLUORIDE NANOCRYSTALS HOLLOW SPHERES NANOPARTICLES RELEASE CORE NANOCAPSULES

Evaluation of the operating range for ground-based infrared imaging tracking system (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, May 24, 2011 - May 24, 2011, Beijing, China
作者: Zhang Z.-D.

收藏 | 浏览/下载：49/0 | 提交时间：2013/03/25

Ground-based infrared imaging tracking system (GIITS) is of great importance for aerial target warning and guard. The operating range is one of the key performance specifications on the other which should be calculated calculate the radiation power received on the detector in order to analysis whether the output signal meets the detection requirements or not analyzed and studied during the whole GIITS design process. The operating range is mostly influenced by a few factors without considering the effect of the background radiation. By improving of the traditional method including atmospheric attenuation a new operating range calculation model of the GIITS was established based on two requirements. One is that the image size of observed target should meet the requirement of the processor signal extraction. The number of the pixel occupied by target image should be more than 9. The other is that the signal noise ratio (SNR) of the GIITS should not be less than 5 to meet the requirements of the target detection probability and spatial frequency. The SNR calculation equation in form of energy is deduced and the radiation characteristic of the observed target and background are analyzed. When evaluate the operating range of the GIITS using the new method the performance of GIITS and feature of target and background. This paper firstly makes analysis and summarization on the definite localizations of the traditional operating range equation of the GIITS. The localizations are mainly in two aspects. On one hand we should successively calculate two operating range values according to two requirements mentioned above and choose the minimum value as the analytic result. In the end the dispersion of the image and the effect of image dispersion are not considered in the traditional method an evaluation of operating range for fighter aircraft is accomplished as an example. The influence factors in every aspect on operating range were explored by the calculated result. The new operating range calculation model provides the theoretical basis for the design and applications as well as the comprehensive evaluation of a GIITS. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).

Simulation and experiment of the static FTIR based on micro multi-step mirrors (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Sensor and Micromachined Optical Device Technologies, May 24, 2011 - May 26, 2011, Beijing, China
作者: Liang Z.-Z.; Zhang J.; Zhang J.; Zhang J.; Zhu W.-B.

收藏 | 浏览/下载：30/0 | 提交时间：2013/03/25

In recent years Fourier transform spectrometer (FTS) with small size and low mass is required in many applications with growing need for real-time and small platform spectral detection. In this paper a micro Fourier transform infrared spectrometer (FTIR) based on spatial modulation mode was designed. This spectrometer has the advantages of high stability and simplified configuration. It also promises optical path differences (OPD) with high precision as MOEMS technology is used in manufacturing the key components. The simulation and the experiments with regard to this FTIR configuration have been done. Firstly the diffraction effect of the micro multi-step mirrors (MMSMs) is studied. We discuss the influence to the reversed spectrum by different mirror widths and different diffraction distances. Secondly we simulate and analyze the influence of the source solid angle to the spectral resolution. Thirdly we set up the theoretical model of the collimation error which is mainly from the defocus of the optical system and analyze the result caused by the collimation error. Fourthly a new discrete Fourier transform arithmetic using least-squares cosines progression (LSCP) is proposed which can reconstruct the spectrum with nonuniform sampled signals. Finally the MMSMs are fabricated used the MOEMS technology and the structural parameters are tested. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).

Experiments of second harmonic generation output in pulsed TEA CO 2 laser (EI CONFERENCE) 会议论文 OAI收割
High-Power Lasers and Applications V, October 18, 2010 - October 19, 2010, Beijing, China
作者: Li D.

收藏 | 浏览/下载：54/0 | 提交时间：2013/03/25

It is always the hot subject to realize the output of high-power laser in the range of 3-5m wavelength. This rang of wave band has greatly important applications in military because it located in the atmosphere window. Generally there are two ways to obtain this range of laser wavelength. One way is through optical parameter oscillation (OPO) from shorter laser wavelength and the other is through second harmonic generation (SHG) from longer laser wavelength. Firstly the comparison between tow nonlinear crystals ZnGeP2 and AgGaSe2 is conducted for their nonlinear coefficient and damaging threshold in theory. The theoretical results show that the crystal AgGaSe 2 is more suitable for the SHG of pulsed TEA CO2 laser. When using pulsed TEA CO2 laser with wavelength of 9.3m to pumping AgGaSe2 SHG crystal the wavelength of 4.65m is obtained. In the condition of repetition rate 100Hz the upmost output power of single pulse is up to level of 1W which corresponding efficiency of SHG is about 6%. The experimental results show that the polarization of laser beam has greatly influence on the SHG output of the crystal. Under the radiation of 3MW/cm 2 from fundamental wave and the right position for maximal SHG output in the crystal when polarization of laser beam rotates 4.5 the SHG output of energy decrease about 30%. The research of this paper will make a foundation for further development of mid-infrared laser. 2010 Copyright SPIE - The International Society for Optical Engineering.

Packaging technology of polymer/Si arrayed waveguide grating and their environmental stability (EI CONFERENCE) 会议论文 OAI收割
2005 6th International Conference on Electronics Packaging Technology, August 30, 2005 - September 2, 2005, Dameisha, Shenzhen, China
作者: Zhang Y.; Zhang X.; Zhang X.; Zhang X.; Wang F.

收藏 | 浏览/下载：30/0 | 提交时间：2013/03/25

Future optical communication systems will use more of the exceptional high bandwidth of optical fiber. Wavelength division multiplexing (WDM) systems are well suited to transport terabits of information via the fiber[1]. Multiplexers/ demultiplexers (MUX/DEMUX) are essential components for dense WDM systems. Several different kinds of multiplexer types have been developed in the past: (a) interference filters (b) fiber gratings and (c) planar lightwave circuit (PLC) MUX/DEMUXers[2 3]. The planar fabrication process of the last mentioned PLCs allows the realization of high performance filters with a large number of wavelength channels. Further an integration with other optical elements seems to be possible. Arrayed waveguide gratings (AWG) are a special kind of PLC-MUX/DEMUXers which are very attractive components for WDM systems because of their great flexibility in filter design[4 5]. Basically an AWG is an optical spectrograph built in planar waveguide technique. Typically AWGs works in a high grating order (50-250). For AWG multiplexer applications in communications systems a precise wavelength controllability and wavelength stability with long term is demanded. Recently a polymeric (especially fluorinated polymer with low optical absorption loss in the infrared region) AWG has attracted much attention because of its easy fabrication low cost possibility and a potential of integration with other polymer devices[6]. Standard AWGs however show a change of center wavelength with temperature. A method to prevent this temperature drift is to package the AWG together with a temperature controller in order to tune and fix the desired filter-wavelength. In this paper a 32-channel AWG was fabricated using a cross-linkable fluorinated poly (ether ether ketone) (FPEEK) its package technology and environmental stability were also discussed. 2005 IEEE.

Synthesis of high-quality AgGaSe2 polycrystalline material by the melt temperature oscillation method 期刊论文 OAI收割
Materials Chemistry and Physics, 1996, 卷号: 46, 期号: 1, 页码: 100-102
S. F. Zhu; B. J. Zhao; J. Liu; H. G. Jiang; Z. H. Li; W. T. Li

收藏 | 浏览/下载：20/0 | 提交时间：2012/04/14

silver gallium diselenide polycrystal synthesis melt temperature oscillation infrared applications optical-quality crystals growth