Fabrication of Functional Surface Patterns by Inkjet Printing
Li, Wenyi.
2019
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Inkjet printing has
been an established and popular deposition technique in both industrial and academic
fields for many years. While it is widely applied in daily graphical pattern production,
by tailoring the ink and substrate materials and jetting variables during the printer
settings, this technique can also serve as a material fabrication tool due to its small
drop volume and precise ... read moredeposition. Recently, inkjet printing has also found potentials
to be a site-specific chemical synthesis tool with high reaction yields along with
material consumption. In this research, the inkjet printing technique is explored and
expanded to be a platform for the fabrication of functional surfaces through
multi-material deposition and control over the physical and chemical interactions with
the printing substrates. Based on the understanding of fundamental inkjet printing
mechanism and drop interaction with substrates, applications in technical, chemical and
biological fields have been achieved. Conductive traces on flexible paper and polymer
surfaces are obtained by inkjet printing water-based metal nanoparticle suspension
followed by subsequent rapid low-power plasma sintering. Reproducible electrochemical
sweat pH sensors on paper patches are generated by depositing silk-based pH-sensitive
ink. Direct patterning of biophotonic crystals is realized by inkjet printing of organic
solvents for surface etching. Biosilica micropattern on silk hydrogel is generated by
inkjet printing R5 peptides for cell and protein alignment. In this dissertation, inkjet
printing of nanoparticle suspension, bio-ink (silk solution and biomolecules) and
organic solvents on paper, polymer, silk film and silk hydrogel are described. With the
combination of printing strategies and material diversity, this printing technique
suggests novel tactics for the realization of functional interfaces with life sciences
and advanced technologies.
Thesis (Ph.D.)--Tufts University, 2019.
Submitted to the Dept. of Biomedical Engineering.
Advisor: Fiorenzo Omenetto.
Committee: Xiaocheng Jiang, Benedetto Marelli, and Hyunmin Yi.
Keyword: Biomedical engineering.read less - ID:
- 1257b5614
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