Photodeposition in Porous Glasses

多孔玻璃中的光沉积

• 批准号: 9314033
• 负责人: Steven Schwarz
• 金额: $ 31万
• 依托单位: CUNY Queens College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-05-01 至 1998-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9314033&HistoricalAwards=false
• 关键词: Photodeposition; Porous; Glasses

9314033 Gafney This research is concerned with the study of methodologies capable of incorporating and patterning new materials in transparent media such as glasses needed for new optical technologies. One approach is the photolysis of transition and main group organometallic reagents adsorbed on porous Vycor glass and tetramethylorthosilicate-methanol-water (TMOS/CH3OH/H20) xerogels followed by thermal consolidation to a nonporous glass. Deposition changes the refractive index, and standard photolithographic techniques offer a means of patterning refractive index gradients, magnetic impregnates, and regions of porosity within the host glass. However, there is little information on the nature of the species deposited, their properties, or their effect on the host matrix. In this work, a number of techniques will be used to determine the nature and properties of the deposits. These techniques include electronic and diffuse reflectance fourtier transform infra-red spectroscopy, Mossbauer, electron spin resonance, and other spectroscopic techniques. Specifically, it is proposed to determine the criteria for the deposition of transparent, magnetically-ordered iron in the different glasses, and through a comparison of the results in the different matrices, probe the effect of the host matrix. Cluster precursors and applied magnetic fields will be examined as means to enhance magnetic ordering without necessarily increasing impregnate aggregation. Similar experiments will be conducted using trimetholtin iodide (CH3)3SnI, except in this case, the goal will be to determine how tin prevents consolidation of Si-based glasses. Because porosity offers access into an optical network, this work will examine polymer diffusion as a way to carry reagents that are unable to withstand glass consolidation temperatures, typically 1000C, into an optical network in glass. The photo deposition of Cr-, Er, Nd- organometallics will be examined as a means to deposit laser ac tive species, and tailor optical and magnetic properties. To determine the generality of the technique, photo deposition in Al-, Se and Te-based glasses will be examined. The nature of the species deposited and their properties will be compared to those obtained in Sibased glasses to better understand the role of the host matrix. %%% This research is concerned with the study of methodologies capable of incorporating and patterning new materials in transparent media such as glasses needed for new optical technologies. It is proposed to determine the criteria for the deposition of transparent, magnetically-ordered iron in the different glasses, and probe the effect of the host matrix. To determine the generality of the technique, photo deposition in aluminum-, selenium- and tellurium-based glasses will be examined. The nature of the species deposited and their properties will be compared to those obtained in silicon-based glasses to better understand the role of the host matrix.

9314033 Gafney 这项研究涉及能够在透明介质（例如新光学技术所需的玻璃）中结合新材料并对其进行图案化的方法的研究。 一种方法是光解吸附在多孔 Vycor 玻璃和原硅酸四甲酯-甲醇-水 (TMOS/CH3OH/H20) 干凝胶上的过渡族和主族有机金属试剂，然后热固结成无孔玻璃。 沉积会改变折射率，而标准光刻技术提供了一种在基质玻璃内形成折射率梯度、磁性浸渍和孔隙区域图案的方法。 然而，关于沉积物种的性质、它们的特性或它们对宿主基质的影响的信息很少。 在这项工作中，将使用多种技术来确定矿床的性质和特性。 这些技术包括电子和漫反射傅里叶变换红外光谱、穆斯堡尔、电子自旋共振和其他光谱技术。 具体来说，建议确定在不同玻璃中沉积透明磁序铁的标准，并通过比较不同基质中的结果，探讨主体基质的影响。将检查团簇前驱体和施加的磁场，作为增强磁有序性而不必增加浸渍聚集的手段。 将使用三甲氧基碘化物 (CH3)3SnI 进行类似的实验，但在这种情况下，目标将是确定锡如何防止硅基玻璃的固结。 由于孔隙率提供了进入光学网络的通道，因此这项工作将检查聚合物扩散作为一种将无法承受玻璃固结温度（通常为 1000°C）的试剂携带到玻璃光学网络中的方法。 Cr-、Er、Nd-有机金属的光沉积将作为沉积激光活性物质并定制光学和磁性的一种手段进行研究。 为了确定该技术的通用性，将检查 Al、Se 和 Te 基玻璃中的光沉积。 沉积物质的性质及其特性将与硅基玻璃中获得的物质进行比较，以更好地了解主体基质的作用。 %%% 这项研究涉及能够在透明介质（例如新光学技术所需的玻璃）中融入新材料并对其进行图案化的方法的研究。 建议确定在不同玻璃中沉积透明磁序铁的标准，并探讨主体基质的影响。 为了确定该技术的通用性，将检查铝基、硒基和碲基玻璃中的光沉积。 沉积物质的性质及其特性将与硅基玻璃中获得的物质进行比较，以更好地了解主体基质的作用。