2003
DOI: 10.1063/1.1593786
|View full text |Cite
|
Sign up to set email alerts
|

High-sensitivity noncontact atomic force microscope/scanning tunneling microscope (nc AFM/STM) operating at subangstrom oscillation amplitudes for atomic resolution imaging and force spectroscopy

Abstract: Cataloged from PDF version of article.We describe a new, highly sensitive noncontact atomic force microscope/scanning tunneling microscope (STM) operating in ultrahigh vacuum (UHV) with subangstrom oscillation amplitudes for atomic resolution imaging and force-distance spectroscopy. A novel fiber interferometer with similar to4x10(-4) A/rootHz noise level is employed to detect cantilever displacements. Subangstrom oscillation amplitude is applied to the lever at a frequency well below the resonance and changes… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1

Citation Types

1
38
0

Year Published

2005
2005
2019
2019

Publication Types

Select...
6
1

Relationship

0
7

Authors

Journals

citations
Cited by 43 publications
(39 citation statements)
references
References 17 publications
1
38
0
Order By: Relevance
“…Simultaneous lateral stiffness and STM topography images on Si(1 1 1)-(7 Â 7) surface are obtained. We also present the direct measurement of lateral forces as we vary the tip-sample separation, similar to our earlier experiments using ultra small amplitude non-contact AFM/STM [12][13][14][15] in normal forces.…”
Section: Introductionmentioning
confidence: 50%
“…Simultaneous lateral stiffness and STM topography images on Si(1 1 1)-(7 Â 7) surface are obtained. We also present the direct measurement of lateral forces as we vary the tip-sample separation, similar to our earlier experiments using ultra small amplitude non-contact AFM/STM [12][13][14][15] in normal forces.…”
Section: Introductionmentioning
confidence: 50%
“…Sub-resonance AM AFM: [20,35,36,38,41,42] The cantilever is oscillated at a frequency far below its first resonance and the amplitude and phase are monitored. This has the advantages of making it easy to maintain small amplitudes and allowing easy separation of conservative and dissipative forces.…”
Section: Introductionmentioning
confidence: 99%
“…A mechanism to optimize the alignment between the cantilever and the fiber end is of importance for low temperature applications. 26 Therefore, we adopt two compact homebuilt walkers to control the relative position of the fiber and the tip in the x-z direction: x for the cantilever's center in width and z for the fiber-tip distance. The intensity and sensitivity of the MFM signal can be maximized by the following procedure: First, the x walker locates the fiber at the middle of the cantilever to achieve the maximum signal intensity.…”
Section: Tip Stagementioning
confidence: 99%
“…[26][27][28][29] We use a 2 × 2 coupler with an intensity ratio of 9:1 (Gould Fiber Optics). A solid state laser (S3FC1550, Thorlabs) with a wavelength of λ = 1550 nm offers a good control of temperature and power.…”
Section: Optical Interferometric Systemmentioning
confidence: 99%