Dr. Ryan Wagner

585 Purdue Mall · West Lafayette, IN 47907 · rbwagner@purdue.edu

I am a Research Assistant Professor in the School of Mechanical Engineering at Purdue University. My research areas include nanotechnology, microscopy, interferometry, spectrometry, metrology, vibrations, and dynamics. My goal is to apply my expertise in these areas to solve important interdisciplinary and multiphysics research problems.



Experience

Research Assistant Professor

Purdue University, West Lafayette, IN

As a Reserach Proffessor in Mechanical Engineering I supervise graduate students, perform research actives, and engage in grant writing. The goal of my lab is to apply a core expertise in vibrations and dynamics to solve multiphysics problems as a part of interdisciplinary research collaborations.

April 2020 - Present

Postdoctoral Researcher

Asylum Research, Santa Barbara, CA

Asylum Research is a scientific instrument manufacturing company that makes Atomic Force Microscopes (AFM). As part of the research and development team I participated in the development and testing of new AFM instrumentation, techniques, and software.

July 2018 - March 2020

Postdoctoral Researcher

National Institute of Standards and Technology, Gaithersburg, MD

As part of the Mass and Force Group in Quantum Measurement Division I worked on a project to develop a small force standard based on radiation pressure within an optomechanical cavity.

August 2016 - July 2018

Postdoctoral Researcher

National Institute of Standards and Technology, Boulder, CO

As part of the Nanoscale Reliability Group in the Applied Chemicals and Materials Division I worked on various projects to characterize nanomechanical properties with the atomic force microscope.

August 2014 - August 2016

Graduate Research Assistant

Purdue University, West Lafayette, IN

While in graduate school I worked Raman Lab in the School of Mechanical Engineering on various nanotechnology focused projects.

August 2008 - August 2014

Teaching Assistant

Purdue University, West Lafayette, IN

While an undergraduate student I worked as a teaching assistant for ME 270/274, which are the basic mechanics courses in mechanical engineering.

August 2007 - August 2008

Education

Purdue University

Ph.D. in Mechanical Engineering

Thesis title: Advanced atomic force microscopy techniques for characterizing the properties of cellulosic nanomaterials

August 2008 - August 2014

Purdue University

B.S. in Mechanical Engineering

Minor in Physics

August 2004 - May 2008

Publications

Please see my google scholar profile the most up to date list.

[1]
S. S. Cheema et al., “Enhanced ferroelectricity in ultrathin films grown directly on silicon,” Nature, vol. 580, no. 7804, pp. 478–482, 2020.
[2]
G. Shaw, J. Taylor, R. Wagner, and F. Guzman, Optomechanical reference. 2019.
[3]
M. Lorenz, R. Wagner, R. Proksch, and O. S. Ovchinnikova, “Photoinduced Thermal Desorption on an Atomic Force Microscope Platform Coupled with Mass Spectrometry for Multimodal Imaging,” Microscopy and Microanalysis, vol. 25, no. S2, pp. 1064–1065, 2019.
[4]
P. N. Ciesielski et al., “Nanomechanics of cellulose deformation reveal molecular defects that facilitate natural deconstruction,” Proceedings of the National Academy of Sciences, vol. 116, no. 20, pp. 9825–9830, 2019.
[5]
T. J. Woehl, R. B. Wagner, J. Killgore, and R. Keller, Electron vibrometer and determining displacement of a cantilever. Google Patents, 2018.
[6]
R. Wagner, F. Guzman, and G. Shaw, “Towards a Photonic Quantum Standard for Mass and Force,” in 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018), 2018, pp. 1–2.
[7]
R. Wagner, F. Guzman, A. Chijioke, G. K. Gulati, M. Keller, and G. Shaw, “Direct measurement of radiation pressure and circulating power inside a passive optical cavity,” Optics Express, vol. 26, no. 18, pp. 23492–23506, 2018.
[8]
R. Wagner and J. Killgore, “Reconstructing the distributed force on an atomic force microscope cantilever,” Nanotechnology, vol. 28, no. 10, p. 104002, 2017.
[9]
R. Wagner, R. J. Moon, and A. Raman, “Mechanical properties of cellulose nanomaterials studied by contact resonance atomic force microscopy,” Cellulose, vol. 23, no. 2, pp. 1031–1041, 2016.
[10]
R. Wagner, T. Woehl, R. Keller, and J. Killgore, “Detection of atomic force microscopy cantilever displacement with a transmitted electron beam,” Applied Physics Letters, vol. 109, no. 4, p. 043111, 2016.
[11]
R. Wagner, J. P. Killgore, R. C. Tung, A. Raman, and D. C. Hurley, “Vibrational shape tracking of atomic force microscopy cantilevers for improved sensitivity and accuracy of nanomechanical measurements,” Nanotechnology, vol. 26, no. 4, p. 045701, 2015.
[12]
R. Wagner and J. P. Killgore, “Photothermally excited force modulation microscopy for broadband nanomechanical property measurements,” Applied Physics Letters, vol. 107, no. 20, p. 203111, 2015.
[13]
R. B. Wagner, “Advanced atomic force microscopy techniques for characterizing the properties of cellulosic nanomaterials,” PhD Thesis, Purdue University, 2014.
[14]
R. Wagner, A. Raman, and R. Proksch, “Spatial spectrograms of vibrating atomic force microscopy cantilevers coupled to sample surfaces,” Applied Physics Letters, vol. 103, no. 26, p. 263102, 2013.
[15]
R. Wagner, B. R. Pittendrigh, and A. Raman, “Local elasticity and adhesion of nanostructures on Drosophila melanogaster wing membrane studied using atomic force microscopy,” Applied Surface Science, vol. 259, pp. 225–230, 2012.
[16]
R. Wagner, R. Moon, J. Pratt, G. Shaw, and A. Raman, “Uncertainty quantification in nanomechanical measurements using the atomic force microscope,” Nanotechnology, vol. 22, no. 45, p. 455703, 2011.
[17]
M. T. Postek et al., “Development of the metrology and imaging of cellulose nanocrystals,” Measurement Science and Technology, vol. 22, no. 2, p. 024005, 2011.
[18]
X. Wu, R. Wagner, A. Raman, R. Moon, A. Martini, and B. N. Center, “Elastic deformation mechanics of cellulose nanocrystals,” TMS (The minerals, metals & materials society) supplemental proceedings, vol. 2, pp. 689–696, 2010.
[19]
R. Wagner, A. Raman, R. Moon, and others, “Transverse elasticity of cellulose nanocrystals via atomic force microscopy,” Cellulose, vol. 7, p. 27, 2010.
[20]
A. Martini, X. E. Wu, R. Wagner, A. Raman, and R. J. Moon, “Anisotropic elasticity of crystalline cellulose: Atomistic modeling & experiments,” in International Conference on Nanotechnology for the Forest Products Industry 2010, 2010, pp. 292–294.

Awards

  • National Research Council, Postdoctoral Fellowship, 2014
  • Charles C. Chappelle Fellowship, Purdue University, 2009