Publication

SECM photography

Hubert Girault, Fernando Cortes Salazar, Bin Su, Mohamad Hojeij
2008
Journal Articles

Abstract

A novel strategy for imaging commercial black-and-white negative photo films by scanning electrochemical microscopy (SECM) is demonstrated. The imaging is based on using IrCl3 6 as the redox mediator to dissolve silver grains. The SECM probe is biased at a sufficient constant anodic potential (0.8 V vs. Ag QRE) to oxidize IrCl3 6 under diffusion control. SECM images of a patterned band array (2.8 mm 3 mm) and of an ‘‘EPFL” logo (8.6 mm 7 mm) have been recorded with a high resolution from the black-and-white negative photo films. The factors relevant to the quality of images are discussed.

Official source

https://infoscience.epfl.ch/entities/publication/d8f89503-fa21-4225-b6cd-5cdb22aad5c6

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Hubert Girault, Fernando Cortes Salazar, Bin Su, Mohamad Hojeij
2008
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/d8f89503-fa21-4225-b6cd-5cdb22aad5c6

About this result

Related concepts (19)

Scanning probe microscopy

Scanning probe microscopy (SPM) is a branch of microscopy that forms images of surfaces using a physical probe that scans the specimen. SPM was founded in 1981, with the invention of the scanning tunneling microscope, an instrument for imaging surfaces at the atomic level. The first successful scanning tunneling microscope experiment was done by Gerd Binnig and Heinrich Rohrer. The key to their success was using a feedback loop to regulate gap distance between the sample and the probe.

Photographic film

Photographic film is a strip or sheet of transparent film base coated on one side with a gelatin emulsion containing microscopically small light-sensitive silver halide crystals. The sizes and other characteristics of the crystals determine the sensitivity, contrast, and of the film. The emulsion will gradually darken if left exposed to light, but the process is too slow and incomplete to be of any practical use. Instead, a very short exposure to the image formed by a camera lens is used to produce only a very slight chemical change, proportional to the amount of light absorbed by each crystal.

Standard electrode potential

In electrochemistry, standard electrode potential , or , is a measure of the reducing power of any element or compound. The IUPAC "Gold Book" defines it as: "the value of the standard emf (electromotive force) of a cell in which molecular hydrogen under standard pressure is oxidized to solvated protons at the left-hand electrode". The basis for an electrochemical cell, such as the galvanic cell, is always a redox reaction which can be broken down into two half-reactions: oxidation at anode (loss of electron) and reduction at cathode (gain of electron).

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