A phase diagram of smectogen-non-smectogen binary mixture: A photon transmission study

S. Yildiz; I. E. Serhatli; Ö Pekcan; A. N. Berker; H. Özbek

doi:10.1142/S0217979202013122

A phase diagram of smectogen-non-smectogen binary mixture: A photon transmission study

S. Yildiz
, I. E. Serhatli
, Ö Pekcan
, A. N. Berker
, H. Özbek^*

^*Bu çalışma için yazışmadan sorumlu yazar

Istanbul Technical University
Feza Gursey Res. Ctr. of Basic Sci.
Massachusetts Institute of Technology

Araştırma sonucu: Dergiye katkı › Makale › bilirkişi

6 Atıf (Scopus)

Özet

The ultraviolet/visible photon transmission technique was applied to study the phase diagram of a mixture of 4-ethoxy-4′-(6-vinyloxyhexyloxyl) azobenzene (VE), a smectogen, and 4-hexoxy-3′-methyl-4′-(6-acryloyloxyhexyloxy) azobenzene (AH), which by itself exhibits no liquid crystalline behavior. It has been found that the N-Sm-A phase line terminates at either a tricritical point at about X_VE = 0.9, where X_VE is the weight percentage of VE in the binary mixture, or at least at a tricritical region 0.9 < X_VE < 1 within the experimental resolution. For X_VE = 1 the nematic phase region is not large enough to drive the transition second-order. It is found that the value of the critical exponent β for X_VE = 0.9 is consistent with the tricritical value.

Orijinal dil	İngilizce
Sayfa (başlangıç-bitiş)	3959-3970
Sayfa sayısı	12
Dergi	International Journal of Modern Physics B
Hacim	16
Basın numarası	26
DOI'lar	https://doi.org/10.1142/S0217979202013122
Yayın durumu	Yayınlandı - 20 Eki 2002

Finansman

This work was supported by the Scienti c and Techonological Research Council of Turkey (TÜBI_TAK) under Grant No: TBAG-1951 (100T074), and the Research Fund of Istanbul Technical University, Grant No: 1426 and 1538. The authors wish to thank Prof. G. Galli (University of Pisa, Chemistry Department) for providing the liquid crystalline monomer.

Finansörler	Finansör numarası
Scienti c and Techonological Research Council of Turkey	TBAG-1951, 100T074
Istanbul Teknik Üniversitesi	1426, 1538

Belgeye Erişim

10.1142/S0217979202013122

Diğer Dosyalar ve Linkler

Link to publication in Scopus

Alıntı Yap

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title = "A phase diagram of smectogen-non-smectogen binary mixture: A photon transmission study",

abstract = "The ultraviolet/visible photon transmission technique was applied to study the phase diagram of a mixture of 4-ethoxy-4′-(6-vinyloxyhexyloxyl) azobenzene (VE), a smectogen, and 4-hexoxy-3′-methyl-4′-(6-acryloyloxyhexyloxy) azobenzene (AH), which by itself exhibits no liquid crystalline behavior. It has been found that the N-Sm-A phase line terminates at either a tricritical point at about XVE = 0.9, where XVE is the weight percentage of VE in the binary mixture, or at least at a tricritical region 0.9 < XVE < 1 within the experimental resolution. For XVE = 1 the nematic phase region is not large enough to drive the transition second-order. It is found that the value of the critical exponent β for XVE = 0.9 is consistent with the tricritical value.",

keywords = "Binary mixture, Critical exponents, Nematic order, Photon transmission technique, Smectic order, Tricritical point",

author = "S. Yildiz and Serhatli, \{I. E.\} and {\"O} Pekcan and Berker, \{A. N.\} and H. {\"O}zbek",

year = "2002",

month = oct,

day = "20",

doi = "10.1142/S0217979202013122",

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journal = "International Journal of Modern Physics B",

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TY - JOUR

T1 - A phase diagram of smectogen-non-smectogen binary mixture

T2 - A photon transmission study

AU - Yildiz, S.

AU - Serhatli, I. E.

AU - Pekcan, Ö

AU - Berker, A. N.

AU - Özbek, H.

PY - 2002/10/20

Y1 - 2002/10/20

N2 - The ultraviolet/visible photon transmission technique was applied to study the phase diagram of a mixture of 4-ethoxy-4′-(6-vinyloxyhexyloxyl) azobenzene (VE), a smectogen, and 4-hexoxy-3′-methyl-4′-(6-acryloyloxyhexyloxy) azobenzene (AH), which by itself exhibits no liquid crystalline behavior. It has been found that the N-Sm-A phase line terminates at either a tricritical point at about XVE = 0.9, where XVE is the weight percentage of VE in the binary mixture, or at least at a tricritical region 0.9 < XVE < 1 within the experimental resolution. For XVE = 1 the nematic phase region is not large enough to drive the transition second-order. It is found that the value of the critical exponent β for XVE = 0.9 is consistent with the tricritical value.

AB - The ultraviolet/visible photon transmission technique was applied to study the phase diagram of a mixture of 4-ethoxy-4′-(6-vinyloxyhexyloxyl) azobenzene (VE), a smectogen, and 4-hexoxy-3′-methyl-4′-(6-acryloyloxyhexyloxy) azobenzene (AH), which by itself exhibits no liquid crystalline behavior. It has been found that the N-Sm-A phase line terminates at either a tricritical point at about XVE = 0.9, where XVE is the weight percentage of VE in the binary mixture, or at least at a tricritical region 0.9 < XVE < 1 within the experimental resolution. For XVE = 1 the nematic phase region is not large enough to drive the transition second-order. It is found that the value of the critical exponent β for XVE = 0.9 is consistent with the tricritical value.

KW - Binary mixture

KW - Critical exponents

KW - Nematic order

KW - Photon transmission technique

KW - Smectic order

KW - Tricritical point

UR - https://www.scopus.com/pages/publications/0037145529

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DO - 10.1142/S0217979202013122

M3 - Article

AN - SCOPUS:0037145529

SN - 0217-9792

VL - 16

SP - 3959

EP - 3970

JO - International Journal of Modern Physics B

JF - International Journal of Modern Physics B

IS - 26

ER -

A phase diagram of smectogen-non-smectogen binary mixture: A photon transmission study

Özet

Finansman

Belgeye Erişim

Diğer Dosyalar ve Linkler

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