Effect of particle shape on drying dynamics in suspension drops using multi-speckle diffusing wave spectroscopy
- Authors
- Park, Baek Sung; Jung, Kevin Injoe; Lee, Seong Jae; Lee, Kwan-Young; Jung, Hyun Wook
- Issue Date
- May-2018
- Publisher
- SPRINGER
- Keywords
- Multi-speckle diffusing wave spectroscopy; Spherical and ellipsoidal particles; Suspension drying; Autocorrelation function; Characteristic time; beta-relaxation; Coffee ring effect
- Citation
- COLLOID AND POLYMER SCIENCE, v.296, no.5, pp.971 - 979
- Indexed
- SCIE
SCOPUS
- Journal Title
- COLLOID AND POLYMER SCIENCE
- Volume
- 296
- Number
- 5
- Start Page
- 971
- End Page
- 979
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/75616
- DOI
- 10.1007/s00396-018-4315-x
- ISSN
- 0303-402X
- Abstract
- The relationship between particle dynamics in a suspension drop during drying and final coffee ring patterns was investigated using suspension systems with spherical and non-spherical ellipsoidal particles. Employing multi-speckle diffusing wave spectroscopy (MSDWS), fast particle Brownian motions in suspension drops containing spherical and ellipsoidal particles were quantitatively compared during the drying process in real time. From the autocorrelation function data and characteristic times for beta-relaxation, we confirmed that ellipsoidal particles move more slowly than spherical particles in a suspension drop due to their structural factor. The resulting coffee ring patterns by spherical and ellipsoidal particles are clearly distinguishable from one another and are dependent upon particulate concentration, initial drop volume, and particle shape. Notably, ellipsoidal particles in a suspension drop form coffee rings less readily than spherical particles.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Chemical and Biological Engineering > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholar.korea.ac.kr/handle/2021.sw.korea/75616)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.