激光防护光学材料的设计及性能研究

随着激光设备的不断发展，自动化程度的不断提高，它对人眼及各种电子装置的干扰、损伤等的威胁也越来越大，激光防护越来越受到各国的重视。报道了激光防护共轭功能高分子的分子设计，合成系列共轭高分子，采用FT-IR、^1H NMR、UV、GPC和TGA对分子结构和热性能进行表征，测试了高分子的光限幅和非线性光学性能，讨论了高分子材料热性能增强与光限幅产生的机理以及分子结构与高分子光学性能之间的关系。     

碳纳米管/高分子复合材料的制备及应用研究进展EI北大核心

将碳纳米管掺杂到聚合物母体中形成的碳纳米管/高分子复合材料具有良好的力学、导电和非线性光学性质。在聚合物中添加少量碳纳米管可以明显改变聚合物的结晶和形貌。大量研究表明,这些复合材料在诸如太阳能电池、有机发光器件、光限幅、光学开关、防护涂料以及人造肌肉等方面具有潜在的实际应用价值。文中介绍了碳纳米管/高分子复合材料的制备方法及其在高科技领域中的应用潜能。     

碳纳米管/高分子复合材料的制备及应用研究进展

将碳纳米管掺杂到聚合物母体中形成的碳纳米管/高分子复合材料具有良好的力学、导电和非线性光学性质。在聚合物中添加少量碳纳米管可以明显改变聚合物的结晶和形貌。大量研究表明,这些复合材料在诸如太阳能电池、有机发光器件、光限幅、光学开关、防护涂料以及人造肌肉等方面具有潜在的实际应用价值。文中介绍了碳纳米管/高分子复合材料的制备方法及其在高科技领域中的应用潜能。     

新型POSS基有机/无机纳米杂化材料的制备及光限幅性能研究

以二苯乙烯衍生物4-乙炔基-4′-硝基二苯乙烯(ENS)和POSS(T8H)为原料,通过钯催化硅氢化反应制备了POSS基有机/无机纳米杂化复合材料(POSS-ENS),并用IR、1H NMR、29Si NMR、UV-vis对其结构进行了表征.同时,对材料的光限幅性能和热性能进行了测试,结果表明,纳米杂化复合材料不仅对532nm、4ns脉宽的激光具有良好的光限幅效应,而且具有很好的光学稳定性和热稳定性能.     

尿烷取代聚二炔反饱和吸收光限幅特性的研究

聚合炔（ＰＤＡｓ）材料有较大的非线性光学效应，在全光设备中有较大的在应用本文分别研究了尿烷取聚二乙炔的增强吸收和粗糙界面的光限幅特性，并分析了共限幅机理，发现粗糙界面光限幅比增强吸收光限幅有更好的光限幅特征。     

长共轭基团取代功能聚丙烯酸酯的制备及光限幅性能研究

设计合成了{4/-[N,N-二(丙烯酸乙酯基)胺基],4-(吡啶-4-乙烯基))偶氮苯(PAC),通过和甲基丙烯酸甲酯共聚,制备出溶解性能较好的聚丙烯酸酯功能高分子,利用FTIR、NMR、UV等对化合物的结构进行了表征.光限幅实验发现,合成的聚合物对脉宽8ns,波长532nm的激光呈现限幅作用,对聚合物的光限幅机理进行探讨,显示主要为反饱和吸收机理.     

石墨烯材料的非线性光学研究进展炭材料专栏

石墨烯作为一种极薄的二维晶体,因其优异的物理和化学特性,引起了科学家广泛的关注。由于石墨烯具有热导率和电子迁移率高、比表面积大、宽波段响应、光学带隙可调、易于表面修饰等特性,石墨烯基材料的光学性质受到了越来越多的重视。近年来,科学家已将该类材料成功地应用到非线性光学研究领域并且取得了一系列重要的研究成果。重点阐述石墨烯及其复合材料近年来在非线性光学中的应用进展,首先概述了石墨烯的饱和吸收特性及其在不同脉冲激光锁模方面的应用;其次介绍了氧化石墨烯在不同条件下的非线性光学性质;最后总结了石墨烯复合材料的光限幅性能以及其激光防护器件的制备,并进一步指出了该研究领域仍存在的一些问题。     

高分子材料在氚工艺和氚防护中的应用

介绍和分析了高分子材料在基本氚工艺设备、惯性约束核聚变聚合物靶丸材料和氚个人防护中的研究和应用现状.并就建立统一的高分子材料氚渗透测试体系和进行高分子材料的各种改性研究以提高抗氚渗透性能等方面提出了建议.     

梯度折射率高分子材料

回顾了梯度折射率材料的发展历史,介绍了园柱径向分布、园柱轴向分布、球径向分布以及立体分布的梯度折射率高分子材料的制造方法、光学性能和发展现状。     

基于非线性光学的激光防护材料

简单总结了现代战争中激光对人眼及光电设备的威胁,阐述了基于光学非线性的激光防护原理,详细综述了激光防护材料的研究现状并指出了其发展方向.     

自修复聚合物在电化学储能领域的研究进展

自修复聚合物材料能够自行修复在加工和使用过程中产生的微观或者宏观损伤,从而解决材料内部微裂纹难以检测和修复的问题,保持其结构和功能的完整性。将自修复聚合物应用于电化学储能器件中,可有效提升器件的安全可靠性和使用寿命,成为近年来的研究热点之一。本文概括介绍了外援型和本征型自修复聚合物材料的修复机理,着重总结了不需要修复剂、且可实现多次可逆修复的本征型自修复聚合物应用于电化学储能领域的研究进展,以储能器件的电极、电解质以及界面为出发点,综述了自修复功能聚合物分别作为高比能电极黏结剂、界面修饰层、可自修复电解质的研究进展,阐述了自修复机理及其对储能器件电化学性能的影响规律,探讨了自修复聚合物材料在储能领域未来的发展方向。     

Graphene and its derivatives for laser protection

The development of functional materials for laser protection is an extremely important research field for the safety and security of users. To achieve simultaneous protection against both pulsed and continuous wave (cw) or quasi-cw lasers, significant research effort has been invested into state-of-the-art broadband optical limiting (OL) materials and processes in an attempt to achieve some measure of protection from such laser beams in the past decades. As the first truly two-dimensional material, graphene is being considered as an ideal material for modern photonic, optoelectronic and electronic devices because of its fantastic physical properties. Graphene shows ultrafast carrier relaxation dynamics and ultra-broadband resonate nonlinear optical (NLO) response due to their extended π-conjugate system and the linear dispersion relation holding for their electronic band structure. Almost all types of graphene-based materials described in this review exhibit strong broadband OL response. The dominant limiting mechanism of graphene is nonlinear scattering, which is very effective in liquid suspensions rather than in solid state hosts. In contrast to the pure graphene, the solubilized graphene and its derivatives optically limits through nonlinear absorption mechanism, nonlinear scattering as well as the photoinduced electron transfer and/or energy transfer between graphene and organic/polymeric species. This review describes systematically the OL mechanisms and the recent achievements on the graphene-based functional materials (i.e., graphene nanostructures, graphene composites, and covalently modified graphene) for OL applications. The future major ongoing areas of effort have also been suggested.     

高分子金属络合物的性能及应用进展

介绍了高分子金属络合物的种类、合成 ,主要综述了高分子金属络合物不同于低分子络合物的催化性能、电学性能、光学性能及磁性以及作为催化剂、光学材料、电学材料等方面的应用进展     

有机电双稳材料与器件的研究进展

由于有机分子材料和聚合物材料本身的各种优良性质,用其取代传统的无机半导体材料来修饰电信号具有非常广阔的研究前景.本文简要介绍了近年来有机电双稳材料与器件在电存储方面的研究进展,并讨论了有机电双稳器件(OEBD)目前存在的问题以及今后发展的方向.     

Self‐Assembly of Functional Molecules into 1D Crystalline Nanostructures

Self‐assembled functional nanoarchitectures are employed as important nanoscale building blocks for advanced materials and smart miniature devices to fulfill the increasing needs of high materials usage efficiency, low energy consumption, and high‐performance devices. One‐dimensional (1D) crystalline nanostructures, especially molecule‐composed crystalline nanostructures, attract significant attention due to their fascinating infusion structure and functionality which enables the easy tailoring of organic molecules with excellent carrier mobility and crystal stability. In this review, we discuss the recent progress of 1D crystalline self‐assembled nanostructures of functional molecules, which include both a small molecule‐derived and a polymer‐based crystalline nanostructure. The basic principles of the molecular structure design and the process engineering of 1D crystalline nanostructures are also discussed. The molecular building blocks, self‐assembly structures, and their applications in optical, electrical, and photoelectrical devices are overviewed and we give a brief outlook on crucial issues that need to be addressed in future research endeavors.     

Monolithic integrated four DFB lasers array with a polymer-based combiner for WDM applications

Compact and low cost integrated photonic components will be of significant importance for a wider penetration of optical technologies into private customer access systems. Hybrid semiconductor/polymer integrated technologies are very promising to achieve this goal by virtue of the highly flexible nature of polymers at both molecular and material scale, of their compatibility with processing steps used in semiconductor technologies, and of their reasonably low cost. One example is an integrated semiconductor 4-wavelength laser array with a polymer based 1–4 passive optical combiner on the same substrate. The polymer waveguide structure is a polysulfone material stripe embedded in PMMA cladding layers, and the laser structure is a buried ridge stripe (BRS). The optical coupling between the active and passive elements is a butt-joint coupling via a reactive ion beam etched (RIBE) semiconductor mirror facet. Such a photonic integration simplifies the optical coupling between a laser array and single mode fibers, while reducing the packaging cost. This optical device has been achieved with interesting performances such as small dimension size (1.2 × 0.5 mm), low laser threshold current, and output powers for each laser from the polymeric waveguide port of at least 1.5 mW without additional on-chip optical amplification.     

紫外激光器及其在微加工中的应用

紫外激光以其波长短、加工精度高、冷加工等特性,在微细制造中具有独特优势,能够有效提高制造品质。近年来,随着现代电子产业的快速发展,其对生产制造的要求不断提高,紫外激光的应用和发展也受到人们的广泛关注。紫外激光在微加工过程中对材料尺寸形状要求小,加工过程灵活可变,产生的热影响区小,能够实现精密复杂结构的加工。本文介绍了紫外激光器的发展过程,并对目前主要用于微加工的两类紫外激光器：准分子激光器和全固态激光器的工作原理和技术特点进行了简要的概述。重点讨论紫外激光在半导体、光学元件和聚合物等领域的技术发展和应用现状,并进一步对未来研究方向进行预测和展望。

     

聚合物/碳纳米管复合材料研究进展

聚合物／碳纳米管复合材料近年来引起人们广泛的关注。本文综述了聚合物／碳纳米管复合材料的研究进展，重点介绍了聚合物／碳纳米管复合材料的类型、制备方法及力学、电学和光学性能等。     

Enhanced Ultrafast Nonlinear Optical Response in Ferrite Core/Shell Nanostructures with Excellent Optical Limiting Performance

Nonlinear optical nanostructured materials are gaining increased interest as optical limiters for various applications, although many of them suffer from reduced efficiencies at high‐light fluences due to photoinduced deterioration. The nonlinear optical properties of ferrite core/shell nanoparticles showing their robustness for ultrafast optical limiting applications are reported. At 100 fs ultrashort laser pulses the effective two‐photon absorption (2PA) coefficient shows a nonmonotonic dependence on the shell thickness, with a maximum value obtained for thin shells. In view of the local electric field confinement, this indicates that core/shell is an advantageous morphology to improve the nonlinear optical parameters, exhibiting excellent optical limiting performance with effective 2PA coefficients in the range of 10^?12 cm W^?1 (100 fs excitation), and optical limiting threshold fluences in the range of 1.7 J cm^?2. These values are comparable to or better than most of the recently reported optical limiting materials. The quality of the open aperture Z‐scan data recorded from repeat measurements at intensities as high as 35 TW cm^?2, indicates their considerably high optical damage thresholds in a toluene dispersion, ensuring their robustness in practical applications. Thus, the high photostability combined with the remarkable nonlinear optical properties makes these nanoparticles excellent candidates for ultrafast optical limiting applications.     

Polymer Carpets

The fabrication of defined polymer objects of reduced dimensions such as polymer‐coated nanoparticles (zero‐dimensional (0D)), cylindrical brushes (1D), and polymer membranes (2D), is currently the subject of intense research. In particular, ultrathin polymer membranes with high aspect ratios are being discussed as novel materials for miniaturized sensors because they would provide extraordinary sensitivity and dynamic range when sufficient mechanical stability can be combined with flexibility and chemical functionality. Unlike current approaches that rely on crosslinking of polymer layers for stabilization, this report presents the preparation of a new class of polymer material, so‐called “polymer carpets,” a freestanding polymer brush grown by surface‐initiated polymerization on a crosslinked 1‐nm‐thick monolayer. The solid‐supported, as well as freestanding, polymer carpets are found to be mechanically robust and to react instantaneously and reversibly to external stimuli by buckling. The carpet mechanics and the dramatic changes of the film properties (optical, wetting) upon chemical stimuli are investigated in detail as they allow the development of completely new integrated micro‐/nanotechnology devices.