Solutions
eQCM
The electrochemical quartz crystal microbalance (eQCM) is an enhanced version of the QCM designed for electrochemical analysis. Here’s a condensed breakdown:
How it works:
Utilizes an oscillating quartz crystal as a sensor.
Changes in resonant frequency indicate mass variations on the crystal surface.
Frequency alterations are precisely quantified, enabling accurate mass determination (Sauerbrey equation).
Applications:
QCMs function not only as scales but also as versatile sensors.
Widely employed in biophysics (e.g., vesicle adsorption), moisture measurement, film thickness determination, solid/liquid phase boundary analysis, sublimation enthalpy, and viscosity determination.
Materials:
Primary material: Crystalline α-quartz.
Special applications may employ materials like langasite (LGS) or gallium orthophosphate (GaPO4).
RTI
Reflectance Transformation Imaging (RTI) is a fascinating method in photography that makes it possible to capture the surface shape and colour of an object through a series of images. Each image is illuminated from slightly different angles1. Here are some important aspects:
How it works:
RTI uses a sequential photograph of the object with different light source positions.
These images are then combined using software to create a manipulable image.
The technique enables virtual and enhanced visualisation of an object’s surface, with the ability to interactively change the direction of illumination.
Applications:
In archaeological research, RTI is used to examine artefacts in more detail.
It helps to analyse surface structures, inscriptions, decorations and other details.
RTI is also useful in numismatics (numismatics) to analyse ancient coins2.
Practical implementation:
Standard photographic equipment and freely available software are used for RTI.
The method is used in the documentation, research, publication and conservation of artefacts.
RTI enables us to visualise hidden details on the surface of objects and opens up new possibilities for research and the preservation of cultural artefacts.
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