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Zinc oxide films with different thicknesses have been synthesized by modified sol-gel technique. The films are polycrystalline in nature with average grain size between 32 and 57 nm. The thicker films are less strained than the thinner ones. The optical band gap of the films is ~ 3.22 eV. PL spectra are dominated by a strong luminescence peak at ~387 nm… (More)

- Aloknath Chakrabarti, Birendranath N. Mandal, Rupanwita Gayen
- Int. J. Math. Mathematical Sciences
- 2005

The dock problem (cf. [2], [4, 5]), which is that of understanding the scattering of surface water waves by a thin semi-infinite rigid plate floating on the free surface of water of infinite depth, gives rise to the following mixed boundary value problem, involving Laplace’s equation in two dimensions, with (x, y) representing the rectangular Cartesian… (More)

- Rupanwita Gayen, Sourav Gupta, Aloknath Chakrabarti
- Appl. Math. Lett.
- 2016

- Rupanwita Gayen, Birendranath N. Mandal
- SIAM Journal of Applied Mathematics
- 2009

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