作者单位
摘要
1 东莞理工学院电子信息与智能化学院, 广东 东莞 523808
2 华南师范大学信息光电子技术学院, 广东 广州, 510631
3 中国科学院化学研究所高分子物理与化学国家重点实验室, 北京 100190
利用太赫兹时域光谱技术 (THz-TDS)对柠檬酸锌二水合物晶体及其失水动力学进行准确、无标记检测。实验结果表明, 室温下柠檬酸锌二水合物有 2个明显的吸收峰: 一个主峰在 1.91 THz, 一个次峰在 1.77 THz。随着温度升高, 柠檬酸锌二水合物吸收主峰强度不断减少, 直至消失。根据柠檬酸锌二水合物在 1.91 THz处的特征吸收峰面积在不同温度、不同加热时间的变化关系, 利用阿伦尼乌斯方程得到柠檬酸锌二水合物转变成无水合物的焓变为 381.13 J/g(232.6 kJ/mol), 与传统差示扫描量热法(DSC)相比测量误差为 4.2%。这些结果表明, THz-TDS可以提供一种快速、有效的结晶水合物焓变检测方法。
太赫兹光谱 柠檬酸锌二水合物 失水动力学 吸收峰 焓变 Terahertz spectroscopy Zinc Citrate dihydrate dehydration kinetics absorption peak enthalpy change 
太赫兹科学与电子信息学报
2023, 21(2): 150
作者单位
摘要
武汉科技大学资源与环境工程学院,冶金矿产资源高效利用与造块湖北省重点实验室,武汉 430081
二氧化硅(SiO2)膜因其耐高温且孔径可调在分离纯化领域得到了广泛关注,但其表面的无定型结构导致渗透性与选择性相互制约,影响分离效果。以二氧化硅膜为基膜,金属有机框架材料(ZIF-8)对其进行修饰改性,制得SiO2@ZIF-8复合膜,探究了ZIF-8合成条件、ZIF-8添加量及原料液温度对复合膜乙醇渗透汽化脱水性能的影响。结果表明:ZIF-8规则的孔道结构提供了额外的水分子传输通道,复合膜的渗透侧含水率可达99.5%,渗透通量提高至9.6 kg/(m2·h),分离因子为1 973。采用Arrhenius方程对改性前后膜的渗透通量与温度的关系进行拟合,发现复合膜在渗透汽化过程中水分子的表观活化能更高,随着温度升高水通量增加的更快,分离效果更好。SiO2@ZIF-8复合膜有效改善了无定型网状结构的缺陷,在渗透汽化有机溶剂脱水方面具有广阔的应用前景。
二氧化硅 金属有机框架材料 复合膜 渗透汽化 乙醇脱水 silicon dioxide metal organic framework material composite membrane pervaporation ethanol dehydration 
硅酸盐学报
2022, 50(7): 1978
Author Affiliations
Abstract
1 Saratov State University (National Research University) 83, Astrakhanskaya Str., Saratov 410012, Russia
2 Tomsk State University (National Research University) 36, Lenina Av., Tomsk 634050, Russia
3 Institute of Precise Mechanics and Control of RAS 24, Rabochaya Str., Saratov 410028, Russia
Complex study of glycerol effects on the skin tissue was performed. The change in optical, weight and geometrical parameters of the rat skin under the action of the glycerol solutions was studied ex vivo. Possible mechanisms of the skin optical clearing under the action of glycerol solutions of different concentrations were discussed. The results can be helpful for refinement of models developed to evaluate the effective diffusion coefficients of glycerol in tissues.
Glycerol solutions skin optical clearing collimated transmittance dehydration 
Journal of Innovative Optical Health Sciences
2021, 14(5): 2142006
作者单位
摘要
中国电子科技集团公司 第四十六研究所,天津 300220
过高的纤芯损耗和纤芯折射率非均匀性严重制约了掺稀土光纤在高功率光纤激光器中的应用,提出一种基于液相掺杂的低损耗近等厚芯层掺稀土光纤的工艺方法。结合改良的化学气相沉积(MCVD)溶液掺杂法制备了含有多层疏松层的掺稀土光纤预制棒,理论分析了光纤预制棒缩棒前、后芯层差的变化原理,采用流量递减沉积工艺降低了缩棒后不同芯层之间的厚度差,并通过优化脱水工艺有效降低了多层疏松层中残留水分的含量。实验结果表明:制备的掺稀土光纤在1380 nm波长处的纤芯损耗仅为9.1 dB/km,有效降低了掺稀土光纤的纤芯损耗和折射率非均匀性。
溶液掺杂 疏松层 脱水 掺稀土光纤 solution doping loose layer dehydration rare earth doped fiber 
光通信技术
2021, 45(1): 48
Author Affiliations
Abstract
Faculty of Technology, Electrical and Electronics Engineering Department, Sakarya University of Applied Sciences, Sakarya, Turkey
In this study, the effects of purification, dehydration, and coagulation processes on the absorption and reduced scattering coefficients of chicken liver tissues have been investigated by using a single integrating sphere system. The purification process performed on the tissue samples to remove blood residue has been found to cause a slight change in the optical parameters. Although the dehydration process brings about an increase in the absorption coefficient due to the water loss, no direct relationship has been observed between the reduced scattering coefficient and the dehydration level of the tissue. In addition, it has been observed that there was a relatively small increase in the absorption coefficient and a significant increase in the reduced scattering coefficient after the coagulation process. Therefore, it can be said that the optical penetration depth decreased significantly after dehydration and coagulation processes unlike blood purification. Moreover, fluence rate distributions inside the fresh, blood purified, dehydrated, and coagulated tissue models have been investigated by using the Monte Carlo modeling of photon transport in multilayered tissues simulation code.
optical properties dehydration coagulation integrating sphere IAD 
Chinese Optics Letters
2021, 19(1): 011701
作者单位
摘要
1 深圳大学 1. 高等研究院
2 深圳大学 2. 光电工程学院, 广东 深圳 518060
CsI光阴极在空气中易潮解是导致实际使用时量子产额降低的重要原因。使用扫描探针显微镜观察CsI光阴极在潮解前后的表面形貌变化,发现CsI晶粒在潮解后的直径与高度变大,且CsI薄膜的覆盖率降低。对CsI光阴极潮解后的表面形貌建模,通过蒙特卡罗模拟来研究CsI光阴极的量子产额在潮解前后的变化。模拟结果显示,CsI晶粒的直径和高度变大会导致CsI光阴极的量子产额下降,并且表面形貌变化越大量子产额下降越多。因此,可以认为潮解造成CsI光阴极量子产额下降的重要原因之一是CsI光阴极表面形貌的变化。
CsI光阴极 潮解 量子产额 表面形貌 蒙特卡罗模型 CsI photocathode dehydration quantum yield surface morphology Monte Carlo model 
半导体光电
2019, 40(3): 360
作者单位
摘要
Department of Laser Technologies and Systems, Saint-Petersburg National Research University of Information Technologies, Mechanics and Optics (ITMO University), Saint Petersburg 197101, Russia
Yb Er:Glass laser Er:YLF laser nail plate microperforation ablation rate ablation efficiency dehydration 
Frontiers of Optoelectronics
2017, 10(3): 299
Author Affiliations
Abstract
1 Physics Department – Polytechnic Institute of Porto School of Engineering Rua Dr. Antonio Bernardino de Almeida, 431, 4200-072 Porto, Portugal
2 FEUP – University of Porto, Rua Dr. Roberto Frias 4200-465 Porto, Portugal
3 CIETI – Centre of Innovation in Engineering and Industrial Technology, ISEP Rua Dr. Antonio Bernardino de Almeida, 431, 4200-072 Porto, Portugal
4 DEEC/FEUP and INESC TEC University of Porto, Rua Dr. Roberto Frias 4200-465 Porto, Portugal
5 Research-Education Institute of Optics and Biophotonics Saratov National Research State University 83 Astrakhanskaya street, Saratov 410012, Russia
6 Laboratory of Laser Diagnostics of Technical and Living Systems Institute of Precision Mechanics and Control RAS 24 Rabochaya street, Saratov 410028, Russia
7 Interdisciplinary Laboratory of Biophotonics Tomsk National Research State University 36 Lenin's avenue, Tomsk 634050, Russia
Optical immersion clearing is a technique that has been widely studied for more than two decades and that is used to originate a temporary transparency effect in biological tissues. If applied in cooperation with clinical methods it provides optimization of diagnosis and treatment procedures. This technique turns biological tissues more transparent through two main mechanisms — tissue dehydration and refractive index (RI) matching between tissue components. Such matching is obtained by partial replacement of interstitial water by a biocompatible agent that presents higher RI and it can be completely reversible by natural rehydration in vivo or by assisted rehydration in ex vivo tissues. Experimental data to characterize and discriminate between the two mechanisms and to find new ones are necessary. Using a simple method, based on collimated transmittance and thickness measurements made from muscle samples under treatment, we have estimated the diffusion properties of glucose, ethylene glycol (EG) and water that were used to perform such characterization and discrimination. Comparing these properties with data from literature that characterize their diffusion in water we have observed that muscle cell membrane permeability limits agent and water diffusion in the muscle. The same experimental data has allowed to calculate the optical clearing (OC) efficiency and make an interpretation of the internal changes that occurred in muscle during the treatments. The same methodology can now be used to perform similar studies with other agents and in other tissues in order to solve engineering problems at design of inexpensive and robust technologies for a considerable improvement of optical tomographic techniques with better contrast and in-depth imaging.
Collimated transmittance agent diffusivity tissue dehydration thickness variation refractive index matching glucose ethylene glycol 
Journal of Innovative Optical Health Sciences
2016, 9(5): 1650035
Author Affiliations
Abstract
1 Research-Educational Institute of Optics and Biophotonics Saratov State University, Saratov 410012, Russia
2 Laboratory of Laser Diagnostics of Technical and Living Systems Institute of Precise Mechanics and Control RAS Saratov 410028, Russia
3 Optoelectronics and Measurement Techniques Laboratory P. O. Box 4500, University of Oulu FIN-90014, Oulu, Finland
The results on determination of glucose and glycerol diffusion coefficients in myocardium tissue are presented. The method is based on the measurement and analysis of temporal dependence of tissue optical collimated transmittance under action of a hyperosmotic agent. This temporal tissue response is related to the rate of the agent and water diffusion in a tissue. The diffusion coefficients for tissue fluid fluxes at glucose and glycerol application to the myocardium at 20℃ have been estimated as (4.75 ± 3.40) × 107 and (7.71 ± 4.63) × 107 cm2/s, respectively.
Diffusion coefficient optical clearing dehydration scattering 
Journal of Innovative Optical Health Sciences
2015, 8(3): 1541006
作者单位
摘要
1 成都光明光电有限责任公司,成都 610100
2 电子科技大学 光电信息学院,成都 610051
利用反应气氛法除水工艺制备了组成为64P205-5.9A12O3-7.1K2O-19BaO-4.0Nd203(Wt%)的掺钕磷酸盐激光玻璃,研究了O2+POCl3、O2+SOCl2两种除水剂的除水效率及同一除水剂在不同除水时间、除水温度、通气流量下对掺钕磷酸盐激光玻璃荧光寿命的影响.结果表明:POCl3的除水效率优于SOCl2;通气最初阶段除水速率最快,且提高除水温度有利于消除水分,但受熔炼设备和工艺的影响,1 200℃进行除水更为合适;延长除水时间、增大通气流量都有助于提高除水效率;玻璃除水反应效率主要受OH基与除水剂界面反应的影响;荧光寿命随着除水时间的延长而增加,最后趋于一个稳定值;通气流量存在最佳值,实验中通气流量为0.8 L/min时较好.
掺钕磷酸盐激光玻璃 钕离子 反应气氛法 除水工艺 OH基 界面反应 荧光寿命 Nd3+-doped phosphate laser glass Neodymium ions Reaction atmosphere process Dehydration processing OH Groups Interface reaction Fluorescence lifetime 
光子学报
2014, 43(1): 0116002_CLJ

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