Photodeposition in Porous Glasses

[9314033] Gafney这项研究关注的是能够在透明介质（如新光学技术所需的玻璃）中合并和制作新材料的方法。一种方法是将过渡族和主族有机金属试剂吸附在多孔Vycor玻璃和四甲基硅酸盐-甲醇-水（TMOS/CH3OH/H20）干凝胶上光解，然后热固结成无孔玻璃。沉积改变了折射率，标准光刻技术提供了折射率梯度、磁浸渍和主体玻璃孔隙区域的图像化手段。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，将使用一些技术来确定矿床的性质和性质。这些技术包括电子和漫反射四层变换红外光谱、穆斯堡尔光谱、电子自旋共振和其他光谱技术。具体而言，提出了确定透明磁有序铁在不同玻璃中的沉积标准，并通过比较不同基质中的结果，探讨基质的影响。团簇前体和外加磁场将作为在不必然增加浸渍物聚集的情况下增强磁有序的手段加以研究。类似的实验将使用碘化三甲氧锡（CH3）3SnI进行，除了在这种情况下，目标将是确定锡如何阻止硅基玻璃的固结。由于孔隙度提供了进入光学网络的途径，这项工作将研究聚合物扩散作为一种方式，将无法承受玻璃固化温度（通常为1000℃）的试剂携带到玻璃中的光学网络中。光沉积Cr-， Er， Nd-有机金属材料将作为沉积激光活性物质的一种手段，并调整光学和磁性能。为了确定该技术的普遍性，将对铝基、Se基和te基玻璃中的光沉积进行研究。沉积物种的性质及其性质将与在硅基玻璃中获得的物质进行比较，以更好地了解宿主基质的作用。本研究关注的是能够在透明介质（如新光学技术所需的玻璃）中合并和制作新材料的方法。提出了确定透明、磁有序铁在不同玻璃中沉积的标准，并探讨基体的影响。为了确定该技术的普遍性，将对铝基、硒基和碲基玻璃中的光沉积进行研究。沉积物质的性质及其性质将与在硅基玻璃中获得的物质进行比较，以更好地了解宿主基质的作用。

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.