Pattern formation in drying droplets of polyelectrolyte and salt

Kaya D., Belyi V. A., Muthukumar M.

JOURNAL OF CHEMICAL PHYSICS, cilt.133, sa.11, 2010 (SCI-Expanded)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 133 Sayı: 11
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1063/1.3493687
  • Dergi Adı: JOURNAL OF CHEMICAL PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: bifurcation, Ising model, nonequilibrium thermodynamics, pattern formation, reaction-diffusion systems, stability, DIFFUSION-LIMITED AGGREGATION, EVAPORATING SESSILE DROPLET, SURFACE-TENSION, FLOW, NANOCRYSTALS, ASSEMBLIES
  • Akdeniz Üniversitesi Adresli: Hayır

Özet

We have discovered spectacular patterns formed by drying aqueous drops of sodium poly (styrene sulfonate) containing fixed amounts of sodium chloride. Crystallization of salt molecules takes place at a critical concentration and several factors such as the polyelectrolyte concentration and humidity affect the final patterns formed. The observed patterns include concentric rings, needle-like structures, chains of triangular-shaped crystallites, etc. We describe the observed phenomenology accompanied by a theoretical model for the occurrence of concentric rings. (C) 2010 American Institute of Physics. [doi:10.1063/1.3493687]

We have discovered spectacular patterns formed by drying aqueous drops of sodium poly (styrene sulfonate) containing fixed amounts of sodium chloride. Crystallization of salt molecules takes place at a critical concentration and several factors such as the polyelectrolyte concentration and humidity affect the final patterns formed. The observed patterns include concentric rings, needle-like structures, chains of triangular-shaped crystallites, etc. We describe the observed phenomenology accompanied by a theoretical model for the occurrence of concentric rings.