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Title: Stratification during evaporative assembly of multicomponent nanoparticle films

Journal Article · · Journal of Colloid and Interface Science
 [1];  [2];  [2];  [2];  [3];  [4];  [5];  [2]
  1. Stony Brook Univ., NY (United States). Dept. of Chemistry; Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials
  2. Stony Brook Univ., NY (United States). Dept. of Chemistry
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials
  4. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials; Univ. of Warsaw (Poland). Dept. of Chemistry
  5. Univ. of Cambridge (United Kingdom). Dept. of Chemical Engineering and Biotechnology

Multicomponent coatings with layers comprising different functionalities are of interest for a variety of applications, including electronic devices, energy storage, and biomaterials. Rather than creating such a film using multiple deposition steps, we explore a single-step method to create such films by varying the particle Peclet numbers, Pe. Our hypothesis, based on recent theoretical descriptions of the stratification process, is that by varying particle size and evaporation rate such that Pe of large and small particles are above and below unity, we can create stratified films of polymeric and inorganic particles. In this paper, we present AFM on the surface composition of films comprising poly(styrene) nanoparticles (diameter 25–90 nm) and silica nanoparticles (diameter 8–14 nm). Previous studies on films containing both inorganic and polymeric particles correspond to large Pe values (e.g., 120–460), while we utilize Pe ~ 0.3–4, enabling us to test theories that have been developed for different regimes of Pe. We demonstrate evidence of stratification and effect of the Pe ratio, although our results agree only qualitatively with theory. Finally, our results also provide validation of recent theoretical descriptions of the film drying process that predict different regimes for large-on-top and small-on-top stratification.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Science Foundation (NSF); Dept. of Education (ED) (United States)
Grant/Contract Number:
SC0012704; CBET-1335787; CHE-1358959; P200A160163
OSTI ID:
1438209
Alternate ID(s):
OSTI ID: 1548891
Report Number(s):
BNL-205654-2018-JAAM
Journal Information:
Journal of Colloid and Interface Science, Vol. 515; ISSN 0021-9797
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 36 works
Citation information provided by
Web of Science

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Spray-assisted vapor deposition of CdS nanoparticles on ZnO nanowires with enhanced photocatalytic performance journal September 2018
Influence of hydrodynamic interactions on stratification in drying mixtures journal July 2018
Stratification of drying particle suspensions: Comparison of implicit and explicit solvent simulations journal June 2019
Stratification of mixtures in evaporating liquid films occurs only for a range of volume fractions of the smaller component journal April 2018
Stratification of mixtures in evaporating liquid films occurs only for a range of volume fractions of the smaller component text January 2018
Stratification of drying particle suspensions: Comparison of implicit and explicit solvent simulations text January 2018

Figures / Tables (9)