Micellar formation and correlation in the cavity of porous silica glass

Journal Article · Thu Nov 15 04:00:00 EST 1990 · Physical Review, A; (USA)

DOI:https://doi.org/10.1103/PhysRevA.42.6015· OSTI ID:6223075

Bradley, K F ^[1]; Chen, S ^[2]; Thiyagarajan, P ^[3]

---

1. Department of Physics, Brown University, Providence, RI (USA)
2. Nuclear Engineering Department, Massachusetts Inst. of Tech., Cambridge, MA (USA) Centerfor Materials Science Engineering, Massachusetts Inst. of Tech., Cambridge, MA (USA)
3. Intense Pulsed Neutron Source,Argonne National Laboratory, Argonne, IL (USA)

Small-angle neutron scattering (SANS) is used to study the scattering length density correlations in a dry porous silica glass (Vycor) and in the glass filled with anionic and cationic surfactant molecules dispersed in water. SANS intensity distributions from empty pores of the glass can be satisfactorily analyzed using a standard late stage spinodal decomposition model in which the porous structure is described by a superposition of random density waves. This model, however, agrees with experiment only if one allows for a suitable distribution of wave numbers for the density waves. Micellar formation is observed in Vycor filled with surfactant solutions. We discuss the interpretation of the intermicellar correlations, measured by SANS, within the pores of the Vycor glass.

• OSTI ID: 6223075
• Journal Information: Physical Review, A; (USA), Journal Name: Physical Review, A; (USA) Vol. 42:10; ISSN 1050-2947; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
AQUEOUS SOLUTIONS
CAVITIES
COHERENT SCATTERING
COLLOIDS
CORRELATIONS
DIFFRACTION
DIMENSIONS
DISPERSIONS
LENGTH
MATERIALS
MICELLAR SYSTEMS
MIXTURES
NEUTRON DIFFRACTION
POROUS MATERIALS
PRECIPITATION
SCATTERING
SCATTERING LENGTHS
SEPARATION PROCESSES
SMALL ANGLE SCATTERING
SOLUTIONS
SURFACTANTS
SYNTHESIS
VYCOR