John Melcher

Origins of phase contrast in the atomic force microscope in liquids (2009)

Melcher, John, Carrasco, Carolina, Xu, Xianfan, Carrascosa, Jose L, Gomez-Herrero, Julio, Jose De Pablo, Pedro, ...

We study the physical origins of phase contrast in dynamic atomic force microscopy (dAFM) in liquids where low-stiffness microcantilever probes are often used for nanoscale imaging of soft biological...

Compositional Contrast of Biological Materials in Liquids Using the Momentary Excitation of Higher Eigenmodes in Dynamic Atomic Force Microscopy (2009)

Xu, Xin, Melcher, John, Basak, Sudipta, Reifenberger, R., Raman, Arvind

Atomic Force microscope (AFM) cantilevers commonly used for imaging soft biological samples in liquids experience a momentary excitation of the higher eigenmodes at each tap. This transient response...

Multiple impact regimes in liquid environment dynamic atomic force microscopy (2008)

Melcher, John, Xu, Xin, Raman, Arvind

A canonical assumption in dynamic atomic force microscopy is that the probe tip interacts with the sample once per oscillation cycle. We show this key ansatz breaks down for soft cantilevers in...

Invited Article: VEDA: A web-based virtual environment for dynamic atomic force microscopy (2008)

Melcher, John, Hu, Shuiqing, Raman, Arvind

We describe here the theory and applications of virtual environment dynamic atomic force microscopy (VEDA), a suite of state-of-the-art simulation tools deployed on nanoHUB (www.nanohub.org) for the...

Organizational capacity and housing production: a study of nonprofit organizations in Michigan

Rex L. LaMore, Susan Cocciarelli, Jose Gomez, John Melcher, John Metzger, Faron Supanich-Goldner, ...