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Langmuir
Volumn 23, Issue 10, 2007, Pages 5305-5314
Hard versus soft particle electrokinetics of silica colloids
Author keywords

[No Author keywords available]
Indexed keywords

ELECTROPHORESIS; POLARIZATION; POLYELECTROLYTES; POTASSIUM COMPOUNDS; SILICA; SURFACE CHARGE;
EID: 34249724375     PISSN: 07437463     EISSN: None     Source Type: Journal    
DOI: 10.1021/la0635451     Document Type: Article
Times cited : (15)
References (99)
  • 5
    • 0003514266 scopus 로고    scopus 로고
    • Ohshima, H, Furusawa, K, Eds, Marcel Dekker: New York
    • Ohshima, H., Furusawa, K., Eds. Electrical Phenomena at Interfaces; Marcel Dekker: New York, 1998.
    • (1998) Electrical Phenomena at Interfaces
  • 8
    • 0002858631 scopus 로고
    • Booth, F. Nature 1948, 161, 83.
    • (1948) Nature , vol.161 , pp. 83
    • Booth, F.1
  • 21
    • 34249704910 scopus 로고    scopus 로고
    • A similar situation is encountered when evaluating the electrokinetics of bare spheroidal colloidal particles with a charge distribution along their surface22-24 deviating from that of otherwise equivalent but uniformly charged particles
    • 22-24 deviating from that of otherwise equivalent but uniformly charged particles.
  • 33
  • 37
    • 34249674254 scopus 로고    scopus 로고
    • The authors of the study34 hold to the constancy of the polyelectrolyte layer thickness while meaning swelling surfaces
    • 34 hold to the constancy of the polyelectrolyte layer thickness while meaning "swelling" surfaces.
  • 41
    • 34249699991 scopus 로고    scopus 로고
    • 39 that in calculating the hydrodynamic particle size the effects of the particle charge and diffuse layer together with the associated polarization and relaxation effects (in the absence of an electric field) are usually omitted so that the colloids might not be considered to have a surface layer at all. Indeed, the hydrodynamic particle radius with increasing ionic strength was found to decline less gradually by taking into account the above effects (e.g., when increasing the electrolyte concentration above 0.1 mM, the hydrodynamic radius of the latices was only 4% larger than the TEM size and became almost constant).
    • 39 that in calculating the hydrodynamic particle size the effects of the particle charge and diffuse layer together with the associated polarization and relaxation effects (in the absence of an electric field) are usually omitted so that the colloids might not be considered to have a surface layer at all. Indeed, the hydrodynamic particle radius with increasing ionic strength was found to decline less gradually by taking into account the above effects (e.g., when increasing the electrolyte concentration above 0.1 mM, the hydrodynamic radius of the latices was only 4% larger than the TEM size and became almost constant).
  • 89
    • 34249734056 scopus 로고    scopus 로고
    • A two-stage force versus distance (force curve) was detected: an electrostatic repulsion at longer distances and a strong repulsion at short distances. It was expected that the short-range repulsion is at least partially resolvable because the electrostatic force by simply positioning the origin of charge at a negative surface separation is equal to half the maximum roughness (∼1.5 nm) of the silica substrate. Moreover, because the extra force in the last few nanometers before contact was much smaller at pH 2 (zero charge) than at pH 5.6 in 102 M NaCl, the effect of the swelling of a gel layer promoted at the higher surface charge density could also participate in the force, This means further moving the origin of charge to negative values, The surface potential was evaluated by fitting the surface force curves at infinite separation, assuming both the plane of charge situated at the plane of closest approach and that of charge shifted -1.5 nm relative to the positio
    • 2 M NaCl), the effect of the swelling of a gel layer promoted at the higher surface charge density could also participate in the force. (This means further moving the origin of charge to negative values). The surface potential was evaluated by fitting the surface force curves at infinite separation, assuming both the plane of charge situated at the plane of closest approach and that of charge shifted -1.5 nm relative to the position of constant compliance.
  • 93
    • 34249717653 scopus 로고    scopus 로고
    • Role of Interfaces In Environmental Protection
    • Barany, S. Ed, Kluwer Academic Publliheri: Dordrecht, The Netherlands, 24, p
    • Škvarla, J. In Role of Interfaces In Environmental Protection, Barany, S. Ed,; Nato Science Series IV; Kluwer Academic Publliheri: Dordrecht, The Netherlands, 2003, Vol, 24, p 201.
    • (2003) Nato Science Series , vol.4 , pp. 201
    • Škvarla, J.1

* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.