Vero is a next-generation AFM from Oxford Instruments Asylum Research that precisely and accurately measures true tip displacement using Quadrature Phase Differential Interferometry (QPDI). Until now, AFMs have relied on optical beam detection (OBD), which actually measures cantilever angle, not tip displacement. This distinction is important for AFM techniques that rely on quantitative analysis of tip motion. Vero builds on the unrivaled stability and performance of the Cypher AFM family and is the first and only AFM to feature QPDI cantilever sensing technology. This unique patented innovation enables Vero to provide AFM results with higher accuracy, precision, and repeatability.
Vero enables more accurate and repeatable AFM results because QPDI:
Measures true tip displacement: QPDI directly measures true tip displacement instead of cantilever angle, enabling improved quantification of many AFM measurements.
Improves measurement sensitivity: QPDI lowers cantilever detection noise by a factor of up to 10× or more on many cantilevers, enabling improved measurement sensitivity.
Avoids crosstalk between vertical and in-plane forces: Only QPDI measures pure vertical tip displacement, avoiding the large crosstalk between ODB vertical and lateral deflection signals.
Is precisely calibrated by the wavelength of light: Interferometric detection avoids the assumptions and uncertainties associated with OBD calibration.
Introducing the Vero Interferometric AFM by Oxford Instruments Asylum Research
Video Credit: Asylum Research - An Oxford Instruments Company