Link to the University of Pittsburgh Homepage
Link to the University Library System Homepage Link to the Contact Us Form

Linear Quadrupole Focusing for High Resolution Microdroplet-Based Fabrication

Heston, Stephen F (2005) Linear Quadrupole Focusing for High Resolution Microdroplet-Based Fabrication. Master's Thesis, University of Pittsburgh. (Unpublished)

Primary Text

Download (4MB) | Preview


In industry, particularly in the field of rapid prototyping, droplet-based manufacturing is proving to be an extremely efficient technique for the production of low cost electronic components. However, for some applications, the desired material properties at deposition are not easily integrated with a homogeneous, low viscosity fluid suitable for droplet ejection. For this reason, it would prove beneficial to have some means of altering the material properties of the droplets during their travel to the substrate. Due to the inherent irregularities in droplet ejection systems, increases in the associated throw-distances and travel times generally cause decreased resolution in placement. Thus, the purpose of this study was to assess the potential of a linear electrodyamic quadrupole for use in constraining the trajectories of charged microdroplets to allow for modification of their material properties prior to deposition. The equations of motion for the droplets within the device were derived and integrated numerically. Approximate bounds on the system stability were determined and the effects of the respective parameters were considered. An experimental system was constructed and used for deposition experiments. The results obtained, show that a linear quadrupole can be used to focus microdroplet streams for deposition, and that the corresponding operating variables can be predicted from the governing equations.


Social Networking:
Share |


Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Heston, Stephen
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairLovell, Michaelmlovell@pitt.eduMLOVELL
Committee MemberSchaefer, Lauralaschaef@engr.pitt.eduLAS149
Committee MemberMickle, Marlinmickle@pitt.eduMICKLE
Date: 28 January 2005
Date Type: Completion
Defense Date: 29 November 2004
Approval Date: 28 January 2005
Submission Date: 2 December 2004
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Mechanical Engineering
Degree: MSME - Master of Science in Mechanical Engineering
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: charged; deposition; droplet-based; fabrication; focusing; microdroplet; quadrupole
Other ID:, etd-12022004-133959
Date Deposited: 10 Nov 2011 20:07
Last Modified: 15 Nov 2016 13:52


Monthly Views for the past 3 years

Plum Analytics

Actions (login required)

View Item View Item