Welcome to the Arnold group homepage

Prof. Craig B. Arnold and his research group focus on materials processing and fabrication, with applications in energy, optoelelectronics, sensing and nanotechnology.

News and recent publications

  • Deposition-on-contact regime and the effect of donor-acceptor distance during laser-induced forward transfer of viscoelastic liquids

    E. Turkoz, A. Perazzo, L. Deike, H. A. Stone and C. B. Arnold, Opt. Mater. Express (2019) demonstrates the novel deposition-on-contact regime during the laser-induced forward transfer of viscoelastic liquids. Dimensionless parameters comparing the underlying forces are introduced, and a phase diagram is presented to predict the resulting deposition regime.

  • Experimental investigations of liquid‑infused surface robustness under turbulent flow

    M. K. Fu, T.-H. Chen, C. B. Arnold, M. Hultmark, Exp. Fluids. (2019) studied the robustness and behavior of lubricant-infused streamwise microgrooves in a turbulent channel flow facility. In the presence of external turbulent shear flow, a finite length of lubricant is found to be retained within the microtextures by a mechanism analogous to capillary rise, consistent with the observations of Wexler et al. (PRL 2015), while the remainder of the lubricant is driven out of the surface. This retention mechanism is exploited to maintain a lubricating layer over a larger surface area by using a novel chemical patterning technique. Chemical barriers are scribed along the streamwise length of the grooves. These periodic barriers disrupt the continuity of the streamwise groove and inhibit the downstream drainage of the lubricant. The effectiveness of this approach is evaluated in a turbulent channel flow with promising results.

  • Varying power generation in ultra low-frequency mechanical energy harvesting of piezoelectrochemical materials

    S. Kang, J. Preimesberger, and C. B. Arnold, Journal of The Electrochemical Society (2019) analyzes difference in power generation between different piezoelectrochemical (PEC) systems and experimentally demonstrates the varying energy converting properties between three different types of PEC systems. This paper explores an important parameter space for controlling power generation behavior in ultra-low-frequency mechanical energy harvesting of PEC materials.

  • Reduction of transfer threshold energy for laser-induced jetting of liquids using Faraday waves

    E. Turkoz, S. Kang, X. Du, L. Deike, and C. B. Arnold, Physical Review Applied (2019) couples flow focusing to BA-LIFT and uses surface-tension effects to reduce the size of the ejected droplet. This approach is expected to impact the development of deposition techniques that incorporate multiple forms of energy to enhance droplet resolution.

  • Emre Turkoz, SeungYeon Kang, Xiaohan (Amanda) Du, Luc Deike, and Craig B. Arnold awarded the best student paper award at SPIE Photonics West 2019

    Emre Turkoz was presented the LAMOM Best Student Paper Award by Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) by Conference Chairs Carlos Molpeceres (L) and Gediminas Račiukaitis (R). Award sponsored by Okamoto Optics and Plymouth Grating Laboratory

Craig Arnold holding a TAG lens

Announcements

  • Graduate student Emre Turkoz has sucessfully defended his thesis. Congratulations Dr. Turkoz!
  • Undergraduate student Anushka Dasgupta has won NSF fellowship for her graduate studies. Congratulations Anushka!
  • Thomas (Tommy) Metke has joined our group as a first-year graduate student! Welcome Tommy!

Talks and Conferences

  • APS DFD 2018: Atlanta, Georgia (November 18-20, 2018). Abstract submission deadline: August 1st, 2018
  • ECS and SMEQ Joint International Meeting: Cancun, Mexico (September 30 – October 4, 2018).