The adhesion and resuspension of nanoparticles is important in applications ranging from semiconductor manufacturing to pollution management. The objective of this work is to understand the effect of particle size on re-entrainment of nanometer scale particles. One of the major contributions is to reduce the randomness introduced in past measurements on resuspension by controlling humidity, temperature, material and the distribution of shape and particle sizes. In the process of studying particle size, the effect of surface roughness was also found. Measurements of the detachment fraction of carbon particles as a function of flow rate show three distinct regimes that we attribute to the dominance of drag, energy accumulation by particles, and collision and agglomeration respectively. Experiments with silica nanoparticles on silica microspheres show the detachment fraction to increase non-linearly with particle diameter and to decrease with the substrate diameter. We attribute the former to the dominance of the drag moment over the adhesive moment. We attribute the influence of the substrates to the surface roughness being comparable to the size of the nanoparticles. This work provides new empirical insight into the interaction of nanoparticles with surfaces and fluid flows.

No description available.

Chan Wang-Ming. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2004. / Includes bibliographical references (leaves 87-94). / Abstracts in English and Chinese. / TITLE PAGE --- p.i / THESIS COMMITTEE --- p.ii / ABSTRACT (ENGLISH) --- p.iii / ABSTRACT (CHINESE) --- p.v / ACKNOWLEDGEMENTS --- p.vi / TABLES OF CONTENTS --- p.vii / LIST OF FIGURES --- p.ix / LIST OF TABLES --- p.xii / Chapters / Chapter 1 --- Introduction --- p.1 / Chapter 2 --- Laser absorption spectroscopy of C2 Phillips System --- p.4 / Chapter A. --- Introduction --- p.4 / Chapter B. --- Quantum mechanics of C2 --- p.13 / Chapter C. --- Experimental details --- p.18 / Chapter D. --- Observation --- p.24 / Chapter E. --- Spectroscopic analysis --- p.30 / Chapter F. --- Discussion --- p.43 / Chapter G. --- Conclusion --- p.48 / Chapter 3 --- Computational study of O2-(rare gas) van der Waals complexes --- p.49 / Chapter A. --- Background --- p.49 / Chapter B. --- Van der Waals complexes: an overview --- p.60 / Chapter C. --- Methodology --- p.62 / Chapter D. --- Results --- p.65 / Chapter E. --- Discussion and Conclusion --- p.81 / Chapter 4 --- Concluding Remarks --- p.85 / REFERENCES --- p.87

No description available.

Thesis (Ph.D)--Chemical Engineering, Georgia Institute of Technology, 2010. / Committee Chair: Victor Breedveld; Committee Member: Eric W. Weeks; Committee Member: Hang Lu; Committee Member: J. Carson Meredith; Committee Member: L. Andrew Lyon. Part of the SMARTech Electronic Thesis and Dissertation Collection.

Bochum, Univ., Diss., 2001. / Computerdatei im Fernzugriff.

Bochum, Univ., Diss., 2001. / Computerdatei im Fernzugriff.

Techn. Universiẗat, Diss., 2000--Berlin.

University, Diss., 2005--Würzburg. / Erscheinungsjahr an der Haupttitelstelle: 2005.

Thesis (Ph. D.)--University of Chicago, Dept. of Chemistry, December 1997. / Includes bibliographical references. Also available on the Internet.