Maloney picture

John M. Maloney

Research affiliate

Research associate / research scientist (2006-2015)
MIT Laboratory for Material Chemomechanics

Senior MEMS engineer (2001-2005) 
MicroCHIPS, Inc.
Engineer-in-residence (2001-2005)
MIT Microsystems Technology Labs

I answer scientific and engineering questions as Mapes on and as Chemomechanics on the less toxic subreddits and (recently) on Stack Exchange.

November 2016: Updated collection of thin film patterns.
September 2016: Updated list of errata and new insights.
June 2016: Blebs, chemical fixation, and the optical stretcher; trying out the new Tufte class in LaTeX (source files here).
July 2015: Sampoerna students kindly summarized my invited talk in Jakarta.
November 2014: Briefed my department on the statistical technique of bootstrapping.
August 2014: New paper published in Soft Matter; updated pictures and publications.
May 2013: What we should know about mechanics of materials.
January 2012: Thesis: Chemomechanics of Attached and Suspended Cells.
January 2010: Gave Topics in Statistics talk at MIT's IAP.
October 2009: Created How deep can cells feel?, a 10-minute video describing recent research.
My Erdős number is at most 5 (Langer, Jaenisch, Lander, Kleitman). See, engineers can do it too!


Equirectangular map Mapping our round-the-world trip programmatically using different global projections.
Cell schematic My PhD research on the chemomechanics of biological cells (thesis, 7MB) was performed in the Van Vliet Group in the Department of Materials Science and Engineering at MIT under co-advisors Prof. Krystyn Van Vliet and Prof. Robert Langer.

1999 lab picture

Publications and pictures are here.
3-D stress state Technical notes (pdf): On true strain vs. engineering strain and Interpreting the Tresca yield criterion (for 3.032, Mechanical behavior of materials); Determining entropy (for 3.20, Materials at equilibrium); Generalized Hooke's Law (for 3.22, Mechanics of materials); What we should know about mechanics of materials; Blebs, chemical fixation, and the optical stretcher.
Cambridge Science Festival poster One of my images of cells could be seen up and down Massachusetts Avenue in Cambridge for several years, before the laminated posters bleached and disintegrated.
Notebook sketch My experience with MIT's oral qualifying exam in materials science and engineering.
Controlled-exposure microchip A controlled-exposure technology is described here in an adapted excerpt from my 2006 MEng thesis.

Optical profilometry image of buckled thin film

I've collected a variety of thin film patterns.

MicroCHIPS logo

From 2001 to 2005 I worked for MicroCHIPS, Inc., a Boston-area bioMEMS company. This extended abstract describes the state of the technology in 2003.

3DMEMS platform

One of my areas of research at the University of Maryland was 3-D microfabrication.

Thermal actuator

The other was electrothermal actuation.

© Copyright John M. Maloney.