Atomic Force Microscopy of Atomic-Scale Ledges and Etch Pits Formed During Dissolution of Quartz

Science ◽  
1991 ◽  
Vol 251 (4999) ◽  
pp. 1343-1346 ◽  
Author(s):  
A. J. GRATZ ◽  
S. MANNE ◽  
P. K. HANSMA
Keyword(s):  
Atomic Force Microscopy ◽  
Atomic Scale ◽  
Etch Pits ◽  
Force Microscopy ◽  
Atomic Force

Nanoindentation studies of sublimed fullerene films using atomic force microscopy

1993 ◽  
Vol 8 (12) ◽  
pp. 3019-3022 ◽  
Author(s):  
Juai Ruan ◽  
Bharat Bhushan
Keyword(s):  
Atomic Force Microscopy ◽  
Transfer Film ◽  
Atomic Scale ◽  
Diamond Surface ◽  
Low Friction ◽  
Force Microscopy ◽  
Diamond Sample ◽  
Atomic Force ◽  
Molecular Scale ◽  
Deposited Films

Nanoindentation studies of sublimed fullerene films have been conducted using an atomic force microscope (AFM). Transfer of fullerene molecules from the as-deposited films to the AFM tip was observed during the indentation of AFM tip into some of the samples, whereas such a transfer was not observed for ion-bombarded films. The fullerene molecules transferred to the AFM tip were subsequently transported to a diamond surface when the diamond sample was scanned with the contaminated tip. This demonstrates the capability of material manipulation on a molecular scale using AFM. Atomic-scale friction of the fullerene films was measured to be low. Ability of fullerene films to form transfer film on the mating AFM tip surface may be partly responsible for low friction.

Direct observations of mineral fluid reactions using atomic force microscopy: the specific example of calcite

2012 ◽  
Vol 76 (1) ◽  
pp. 227-253 ◽  
Author(s):  
E. Ruiz -Agudo ◽  
C. V. Putnis
Keyword(s):  
Atomic Force Microscopy ◽  
Atomic Scale ◽  
Physical Parameters ◽  
Extensive Literature ◽  
Mineral Surfaces ◽  
Kinetic Measurements ◽  
Force Microscopy ◽  
Crystal Dissolution ◽  
Direct Observations ◽  
Atomic Force

AbstractAtomic force microscopy (AFM) enables in situ observations of mineral fluid reactions to be made at a nanoscale. During the past 20 years, the direct observation of mineral surfaces at molecular resolution during dissolution and growth has made significant contributions toward improvements in our understanding of the dynamics of mineral fluid reactions at the atomic scale. Observations and kinetic measurements of dissolution and growth from AFM experiments give valuable evidence for crystal dissolution and growth mechanisms, either confirming existing models or revealing their limitations. Modifications to theories can be made in the light of experimental evidence generated by AFM. Significant changes in the kinetics and mechanisms of crystallization and dissolution processes occur when the chemical and physical parameters of solutions, including the presence of impurity molecules or background electrolytes, are altered. Calcite has received considerable attention in AFM studies due to its central role in geochemical and biomineralization processes. This review summarizes the extensive literature on the dissolution and growth of calcite that has been generated by AFM studies, including the influence of fluid characteristics such as supersaturation, solution stoichiometry, pH, temperature and the presence of impurities.

scholarly journals Atomic Resolution with the Atomic Force Microscope

1995 ◽  
Vol 3 (4) ◽  
pp. 6-7
Author(s):  
Stephen W. Carmichael
Keyword(s):  
Atomic Force Microscopy ◽  
Scanning Tunneling Microscopy ◽  
Atomic Force Microscope ◽  
Recent Article ◽  
Atomic Scale ◽  
Atomic Resolution ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Force Microscopy ◽  
Atomic Force

For biologic studies, atomic force microscopy (AFM) has been prevailing over scanning tunneling microscopy (STM) because it has the capability of imaging non-conducting biologic specimens. However, STM generally gives better resolution than AFM, and we're talking about resolution on the atomic scale. In a recent article, Franz Giessibl (Atomic resolution of the silicon (111)- (7X7) surface by atomic force microscopy, Science 267:68-71, 1995) has demonstrated that atoms can be imaged by AFM.

scholarly journals Coupled fluctuations in element release during dolomite dissolution

2014 ◽  
Vol 78 (6) ◽  
pp. 1355-1362 ◽  
Author(s):  
Christine V. Putnis ◽  
Encarnación Ruiz-Agudo ◽  
Jörn Hövelmann
Keyword(s):  
Atomic Force Microscopy ◽  
Fluid Interface ◽  
Etch Pits ◽  
Incongruent Dissolution ◽  
Step Process ◽  
Force Microscopy ◽  
Precipitated Phase ◽  
Atomic Force ◽  
New Phase

Atomic force microscopy has been used to determine more precisely the mechanism of the initial stages of dolomite dissolution. Analysis of outflow solutions initially shows fluctuations of both Ca and Mg release with concentrations of Ca >> Mg. The dolomite surface dissolves congruently in the presence of slightly acidified water as confirmed by the regular spreading of characteristic rhombohedral etch pits. Direct in situ observations show that a new phase precipitates on the dissolving surface simultaneously. As the Ca and Mg release decreases with time, the precipitated phase can be seen to spread across the dolomite surface. These observations indicate that the apparent incongruent dissolution of dolomite is a two-step process involving stoichiometric dissolution with the release of Ca, Mg and CO3 ions to solution at the mineral–fluid interface coupled with precipitation of a new Mg-carbonate phase. The coupled element release confirms the interface-coupled dissolutionprecipitation mechanism.

scholarly journals Array atomic force microscopy for real-time multiparametric analysis

2019 ◽  
Vol 116 (13) ◽  
pp. 5872-5877 ◽  
Author(s):  
Qingqing Yang ◽  
Qian Ma ◽  
Kate M. Herum ◽  
Chonghe Wang ◽  
Nirav Patel ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Structure Function ◽  
Function Analysis ◽  
Atomic Scale ◽  
Beam Deflection ◽  
Emergent Properties ◽  
Multiscale Approach ◽  
Force Microscopy ◽  
Atomic Force ◽  
Wide Range

Nanoscale multipoint structure–function analysis is essential for deciphering the complexity of multiscale biological and physical systems. Atomic force microscopy (AFM) allows nanoscale structure–function imaging in various operating environments and can be integrated seamlessly with disparate probe-based sensing and manipulation technologies. Conventional AFMs only permit sequential single-point analysis; widespread adoption of array AFMs for simultaneous multipoint study is challenging owing to the intrinsic limitations of existing technological approaches. Here, we describe a prototype dispersive optics-based array AFM capable of simultaneously monitoring multiple probe–sample interactions. A single supercontinuum laser beam is utilized to spatially and spectrally map multiple cantilevers, to isolate and record beam deflection from individual cantilevers using distinct wavelength selection. This design provides a remarkably simplified yet effective solution to overcome the optical cross-talk while maintaining subnanometer sensitivity and compatibility with probe-based sensors. We demonstrate the versatility and robustness of our system on parallel multiparametric imaging at multiscale levels ranging from surface morphology to hydrophobicity and electric potential mapping in both air and liquid, mechanical wave propagation in polymeric films, and the dynamics of living cells. This multiparametric, multiscale approach provides opportunities for studying the emergent properties of atomic-scale mechanical and physicochemical interactions in a wide range of physical and biological networks.

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