PMID- 9268557
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20191120
IS  - 1095-7103 (Electronic)
IS  - 0021-9797 (Linking)
VI  - 192
IP  - 1
DP  - 1997 Aug 1
TI  - Reverse Micelle Formation of Triton X-100 in Butanol and n-Heptane Mixed Solvents 
      Studied by the Positron Annihilation Technique.
PG  - 184-8
AB  - The positron annihilation technique (PAT) has been applied to study the molecular 
      association phenomenon of Triton X-100 (TX-100) and formation of reversed 
      micelles in the mixed solvent of butanol and n-heptane. The results indicate the 
      sensitivity of positronium (Ps) parameters to the phase transition region due to 
      the self-aggregation phenomenon of TX-100 within the system. The intensity of the 
      long-lived ortho-Ps component, I3, and its lifetime, tau3, show a remarkable 
      change at a critical concentration of the surfactant at approximately 1.5 mM 
      coined as the operational CMC of TX-100 in both (1:1) and (1:2) butanol-n-heptane 
      (BuHp) systems. The narrow component/para-Ps intensity as computed from Doppler 
      broadening of annihilation radiation indicates discernable changes at the same 
      concentration region ( approximately 1.5 mM) of TX-100 in the system. Further, 
      microphase changes due to the association of water molecules within the 
      nonaqueous phase has been studied by Ps parameters, which reveals a clear 
      demarcation of the polar and nonpolar zones.
FAU - Das, SK
AU  - Das SK
AD  - Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Saltlake City, Calcutta, 700 
      064, India
FAU - Ganguly, BN
AU  - Ganguly BN
LA  - eng
PT  - Journal Article
PL  - United States
TA  - J Colloid Interface Sci
JT  - Journal of colloid and interface science
JID - 0043125
EDAT- 1997/08/01 00:00
MHDA- 1997/08/01 00:01
CRDT- 1997/08/01 00:00
PHST- 1997/08/01 00:00 [pubmed]
PHST- 1997/08/01 00:01 [medline]
PHST- 1997/08/01 00:00 [entrez]
AID - CS975006 [pii]
AID - 10.1006/jcis.1997.5006 [doi]
PST - ppublish
SO  - J Colloid Interface Sci. 1997 Aug 1;192(1):184-8. doi: 10.1006/jcis.1997.5006.