Revised proposal Nano-composite Matching Layer

修改提案纳米复合匹配层

基本信息

批准号：
6831240
负责人：
Yuhong Huang
金额：
$ 10万
依托单位：
CHEMAT TECHNOLOGY, INC.
依托单位国家：
美国
项目类别：
财政年份：
2004
资助国家：
美国
起止时间：
2004-09-30 至 2005-03-31
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/6831240
关键词：
bioimaging /biomedical imaging biomaterial development /preparation biomaterial evaluation biomaterial interface interaction biotechnology crystallization molecular film nanotechnology polymers sound frequency sound impedance surface coating surface property ultrasonography

项目摘要

DESCRIPTION (provided by applicant): The goal of proposed research is to develop a novel matching materials based on nano-composite materials and to develop spin-on coating process to facilitate fabrication of precisely controlled matching layer. Current technology for making matching layer is difficult in the control of thickness and thus the uniformity of thickness. An increase of acoustic loss was often observed in the system from the adhesion of a matching layer to the transducer. These problems will be much more severe for high frequency ultrasound transducers. In this proposed research, Chemat is planning to develop organic/inorganic hybrid nano-composite Sol-gel system matching materials and coating techniques to overcome these disadvantages of current matching layer technology. Due to nanostructure of the coating, matching layer with extreme low attenuation and wide range of impedance can be achieved. Using this hybrid Sol-gel coating process, uniform coating with thickness varying from submicron to 100 micron can be easily deposited at low temperature. Coating process provides better interface between transducer and matching layer than adhesive bonding process. This eliminates the loss due to the interface defects. In our previous work, Chemat has successfully developed technology for the fabrication of nanosized crystalline powder, its colloidal solution and spin-on process. By working closely with one of the leading research laboratory on diagnostic ultrasonic transducer research lead by Prof. K. Kirk Shung at the Department of Biomedical Engineering, University of Southern California, modeling of the effect of the matching layers developed under this effort on transducer performance will be conducted. The matching layer developed will be incorporated into the fabrication of transducers and tested. Success of this research will result in a new generation of matching layer materials which are easier to fabricate.

描述（由申请人提供）：拟议的研究的目的是开发基于纳米复合材料的新型匹配材料，并开发旋转涂料工艺，以促进精确控制的匹配层的制造。当前用于制造匹配层的技术在控制厚度以及厚度的均匀性方面很困难。从匹配层对传感器的粘附，通常观察到声音损失的增加。对于高频超声传感器，这些问题将更加严重。在这项拟议的研究中，Chemat计划开发有机/无机混合纳米复合溶胶凝胶系统匹配材料和涂料技术，以克服当前匹配层技术的这些缺点。由于涂层的纳米结构，可以实现具有极高衰减和广泛阻抗范围的匹配层。使用此混合溶胶 - 凝胶涂料工艺，厚度从亚微米到100微米变化的均匀涂层很容易在低温下沉积。涂料过程比粘合键合过程提供了传感器和匹配层之间更好的接口。这消除了由于接口缺陷而引起的损失。在我们以前的工作中，Chemat成功地开发了用于制造纳米化结晶粉，其胶体溶液和旋转过程的技术。通过与南加州大学生物医学工程系K. Kirk Shung教授的领导者的领导诊断超声传感器研究的领先研究实验室紧密合作，建模了这种匹配层在这项努力上对透射剂绩效的影响将进行。开发的匹配层将纳入换能器的制造并进行了测试。这项研究的成功将导致新一代的匹配层材料易于制造。