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DOI: 10.1021/la9047227 7833Langmuir 2010, 26(11), 78337842 Published on Web 03/25/2010 pubs.acs.org/Langmuir
 

Summary: DOI: 10.1021/la9047227 7833Langmuir 2010, 26(11), 78337842 Published on Web 03/25/2010
pubs.acs.org/Langmuir
2010 American Chemical Society
Self-Assembly of Colloidal Particles from Evaporating Droplets: Role of
DLVO Interactions and Proposition of a Phase Diagram
Rajneesh Bhardwaj,
Xiaohua Fang,
Ponisseril Somasundaran,
and Daniel Attinger*,

Laboratory for Microscale Transport Phenomena, Department of Mechanical Engineering and
Langmuir
Center of Colloids and Interfaces, Department of Earth and Environmental Engineering, Columbia University,
New York, New York 10027
Received December 14, 2009. Revised Manuscript Received February 24, 2010
The shape of deposits obtained from drying drops containing colloidal particles matters for technologies such as
inkjet printing, microelectronics, and bioassay manufacturing. In this work, the formation of deposits during the drying
of nanoliter drops containing colloidal particles is investigated experimentally with microscopy and profilometry, and
theoretically with an in-house finite-element code. The system studied involves aqueous drops containing titania
nanoparticles evaporating on a glass substrate. Deposit shapes from spotted drops at different pH values are measured

  

Source: Attinger, Daniel - Department of Mechanical Engineering, Columbia University

 

Collections: Engineering