~ ~ ~
Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/New_York' for 'EST/-5.0/no DST' instead in /var/www/custom/archive.cmdm/config.php on line 60

Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/New_York' for 'EST/-5.0/no DST' instead in /var/www/custom/archive.cmdm/config.php on line 60

Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/New_York' for 'EST/-5.0/no DST' instead in /var/www/custom/archive.cmdm/config.php on line 60

Warning: mktime() [function.mktime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/New_York' for 'EST/-5.0/no DST' instead in /var/www/custom/archive.cmdm/config.php on line 60

Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/New_York' for 'EST/-5.0/no DST' instead in /var/www/custom/archive.cmdm/config.php on line 61

Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/New_York' for 'EST/-5.0/no DST' instead in /var/www/custom/archive.cmdm/config.php on line 62

Deprecated: Function ereg_replace() is deprecated in /var/www/custom/archive.cmdm/article.php on line 102
导电金刚石在体内微机电器械中大有作为 - China Medical Device Manufacturer
CMDM

- English | 中文

Fri, January 19th, 2018

2009年11月CMDM电子快讯 » 技术新知
导电金刚石在体内微机电器械中大有作为

By: Shana Leonard

金刚石的价值日益上升。由于金刚石具有惰性且坚硬、抗腐蚀,因此在生物医学领域广受青睐。事实证明,金刚石是多种器械涂层的理想材料。Advanced Diamond Technologies (ADT)公司(美国伊利诺州, Romeoville; www.thindiamond.com)却认为,金刚石能够凭借更重要的价值为设备行业所瞩目。该公司开发出了一种薄膜金刚石材料,其表面光滑且具有导电性——这种综合特性可为某些体内微机电设备带来重大变革。

UNCD Lightning采用ADT的薄膜技术,是一款具有纳米结构的光滑导电金刚石。ADT在化学气相沉积 (CVD) 工艺中添加硼,并利用金刚石表面甲烷和氢的反应形成金刚石碳键,以达到上述效果。金刚石颗粒的大小约为5 nm。“我们使用的这种特殊的化学工艺称为核植入,”ADT公司首席技术官John Carlisle解释道。“新的晶体不断形成,组成纳米结构。 由于该产品具有多种特性,因此性能优于此前使用的其它形式的CVD金刚石。”

形成的超薄膜目前可用于Carlisle所说的“不活泼”的应用中,即依赖于薄膜金刚石的生物相容性及其它固有特性的应用,例如支架及髋和膝关节的涂层。然而,充分利用金刚石的“活泼”特性——即导电性——并结合不活泼特性,才能真正发挥其潜力。

据Carlisle介绍,在金刚石上加载电荷时,与钛和金等材料不同,它不会将水电解。他指出,金刚石的宽电势窗口对于生物医学电极至关重要,因为生物医学电极通常必须与体内活的软组织直接接触。在电极上涂布薄膜金刚石具有广泛的应用前景。“金刚石的电压窗口很宽,我们可以利用它来传递信息,”Carlisle说道。“因此,在2.5 V的电压范围内,我们可以通过此界面以电子方式传导信息。这是电化学工作者非常熟悉的特性;但在生物医学领域却极少受到关注。”

将金刚石的活泼和不活泼特性相结合的目标尽管目前仍处于探索阶段,但其成果在未来的生物医学应用中必将拥有广阔的前景。如果能实现在组织或血液之间传递信息,人类就能开发出可实时检测葡萄糖含量并识别特定神经递质的仪器。Carlisle预计,在更遥远的未来,一旦官能基表面可在水中长期保持稳定,该技术甚至有助于创造出金刚石质的胰腺。


版权所有 © 2005-2010 医疗设计和制造OEM (CMDM) 本网站所有内容,如未获书面同意,不得以任何形式转载和节录。违反上述声明者,我方将依法追究法律责任。

本期其他技术新知

相关文章

- 主页 | 当期杂志 | 订阅 | 联系方式 | 关于我们 -©2011 汇科传讯集团 医疗设计和制造OEM 版权所有.