2010
DOI: 10.1063/1.3458006
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Intermittent contact hydration scanning probe microscopy

Abstract: Hydration scanning probe microscopy is a technique similar to scanning tunneling microscopy, in which the probe current, sustained by the slight surface conduction of a thin hydration layer covering an insulating support surface, is essentially electrochemical in nature instead of electronic tunneling. Such a technique allows the imaging of a great variety of samples, including insulators, provided that they are hydrophilic, as well as the study of molecular samples of biological interest (such as DNA) fixed o… Show more

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Cited by 4 publications
(6 citation statements)
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“…This open source package, operating in a Linux environment, has been originally developed for real time control of the feedback of a scanning microscope. [20][21][22] The second channel of the ADC is used to directly sample the f m signal. Acquired data are stored to disk for off-line processing.…”
Section: Methodsmentioning
confidence: 99%
“…This open source package, operating in a Linux environment, has been originally developed for real time control of the feedback of a scanning microscope. [20][21][22] The second channel of the ADC is used to directly sample the f m signal. Acquired data are stored to disk for off-line processing.…”
Section: Methodsmentioning
confidence: 99%
“…This phenomenon, described both in AFM (Ref. 22) and in HSPM, 23,24 is usually a severe hindrance in measurements; probe oscillation has often been used both for AFM (Ref. 25) and HSPM (Ref.…”
Section: Introductionmentioning
confidence: 99%
“…The key difference for STM in air is that a thin water layer (<1 nm) [48] is present on the STM tip and sample surface under typical laboratory conditions. This may lead to a water bridge between the tip and sample [44,[48][49][50][51]. In such a configuration, the current between the biased tip and sample may have two sources: the expected tunnel current [52][53][54][55][56], and an ionic or Faradaic current of electrochemical nature [44,49,51,[57][58][59].…”
Section: Introductionmentioning
confidence: 99%
“…This may lead to a water bridge between the tip and sample [44,[48][49][50][51]. In such a configuration, the current between the biased tip and sample may have two sources: the expected tunnel current [52][53][54][55][56], and an ionic or Faradaic current of electrochemical nature [44,49,51,[57][58][59]. This latter current is expected to exist in particular at relatively high applied voltages, for example above 1.23 V, the standard theoretical electrochemical potential for water electrolysis [60].…”
Section: Introductionmentioning
confidence: 99%
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