Fabrication process for ferrule-top indenter probes (not to scale): we refer the reader to the main text for a detailed explanation of the steps illustrated.
Indentation tips of different sizes obtained by modifying optical fibers.
Schematic view of the ferrule-top nanoindenter setup.
Readout for ferrule-top cantilever probes.
Readout signal observed while indenting a glass sample with a ferrule-top indenter. The two lines correspond to two different wavelengths of the light source mounted in the readout. The graph is meant to illustrate the advantages (in terms of signal linearity) of working close to quadrature (λ1) rather than close to a maximum of interference (λ2).
Load versus indentation depth curves obtained while indenting the PDMS 10:1 sample with Probe-1.
Illustration of the 2-point analysis method.
Load versus indentation depth for indentation of PDMS (20:1) in liquid by Probe-1.
Ferrule-top indenter probes used for indentation experiments.
Result of the measurement of the reduced Young modulus of two PDMS samples with three different probes.
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