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25 Oct 2004

Volume 85, Issue 17, pp. 3657-3939

Issue Cover Spotlight Figure

Appl. Phys. Lett. 85, 3851 (2004); http://dx.doi.org/10.1063/1.1808886 (3 pages)

P. Guha, S. Kar, and S. Chaudhuri
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Onset detection of solid-state phase transition in estrogen-like chemical via terahertz transmission spectroscopy

Alex V. Quema, Masahiro Goto, Masahiro Sakai, Riadh El Ouenzerfi, Hiroshi Takahashi, Hidetoshi Murakami, Shingo Ono, Nobuhiko Sarukura, and Gerardo Janairo

Appl. Phys. Lett. 85, 3914 (2004); http://dx.doi.org/10.1063/1.1812366 (3 pages) | Cited 5 times

Online Publication Date: 29 October 2004

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Show Abstract
Solid-state phase transition onset in an endocrine-disrupting estrogen-like chemical (1,4-naphthol) is detected using terahertz transmission spectroscopy. The appearance of two absorption peaks and the sudden upsurge of terahertz-radiation power at 210 K indicate the onset of the solid-state phase transition. Differential scanning microscopy reveals a first-order phase transition at around 240 K while temperature-dependent x-ray diffraction analysis shows the occurrence of such phenomenon also at around 240 K. This demonstrates the sensitivity of the terahertz spectroscopic technique to phase transition since it provides a signal before such phenomenon actually occurs.
Show PACS
87.15.B- Structure of biomolecules
64.70.K- Solid-solid transitions
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