| dc.creator |
Oliveira D.A. de |
|
| dc.creator |
Fernandes P.R.G. |
|
| dc.date |
2002 |
|
| dc.date.accessioned |
2013-06-01T09:21:21Z |
|
| dc.date.available |
2013-06-01T09:21:21Z |
|
| dc.date.issued |
2013-06-01 |
|
| dc.identifier |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332002000300012 |
|
| dc.identifier |
http://www.doaj.org/doaj?func=openurl&genre=article&issn=01039733&date=2002&volume=32&issue=2b&spage=531 |
|
| dc.identifier.uri |
http://koha.mediu.edu.my:8181/jspui/handle/123456789/7787 |
|
| dc.description |
In this work we present experimental results that show a resonance effect in the isotropic phase of a lyotropic liquid crystal. The lyotropic mixture is made up of Potassium Laurate (KL), Decanol (DeOH) and water with three different relative concentrations: 2.62, 2.79 and 2.90 (C = [KL]/[DeOH], [KL] and [DeOH] in % molar). These mixtures have an isotropic (ISO) phase between two lamellar phases as a function of the temperature. From the transmittance of the sample (I) as a function of the frequency (f) itwas possible to evaluate a characteristic time (tau) in order of magnitude as a function of the temperature (T). The existence of a maximum in tau vs. T around 30ºC indicates the possibility of employing lyotropic liquid crystals in mechanical vibration sensors. We are proposing a mechanical vibration sensor able to measure low mechanical frequencies (f <= 200 Hz). |
|
| dc.publisher |
Sociedade Brasileira de Física |
|
| dc.source |
Brazilian Journal of Physics |
|
| dc.title |
Resonance effect in isotropic phase of lyotropic liquid crystal |
|