首页   按字顺浏览 期刊浏览 卷期浏览 Biological materials studied with dynamic force microscopy
Biological materials studied with dynamic force microscopy

 

作者: D. Anselmetti,   M. Dreier,   R. Lüthi,   T. Richmond,   E. Meyer,   J. Frommer,   H.‐J. Güntherodt,  

 

期刊: Journal of Vacuum Science&Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena  (AIP Available online 1994)
卷期: Volume 12, issue 3  

页码: 1500-1503

 

ISSN:1071-1023

 

年代: 1994

 

DOI:10.1116/1.587272

 

出版商: American Vacuum Society

 

关键词: BIOLOGICAL MATERIALS;DNA;TOBACCO MOSAIC VIRUS;COLLAGEN;ATOMIC FORCE MICROSCOPY;SPATIAL RESOLUTION;VAN DER WAALS FORCES;CAPILLARITY

 

数据来源: AIP

 

摘要:

Biological materials such as hexagonal packed intermediate (HPI) layers, DNA, tobacco mosaic virus and collagen deposited on various substrates with noncontact dynamic force microscopy under ambient conditions were investigated. This method is highly suited for the investigation of soft organic matter where a minimized interaction between tip and sample is needed for nondestructive and reliable operation. Hence, additional anchoring of the biological specimens was no longer found to be crucial. The vertical and lateral resolution limits of this gentle method were determined to be<0.1 nm and 1–2 nm, respectively, allowing very stable and high resolution results on all investigated systems. By taking approach curves and monitoring the dynamic properties of the cantilever (resonance frequency andQvalue) during the experiment, the interaction mechanism between tip and sample was found to be dominated by attractive van der Waals interaction and capillary forces. Furthermore, initial results from a HPI layer imaged with noncontact dynamic force microscopy in a water environment are presented.

 

点击下载:  PDF (383KB)



返 回