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Influence of surface texture by NH4Cl aqueous solution on the electrical and optical properties of al-doped zinc oxide films

Xiao-Yong,Gao; Qing-Geng,Lin; Yu-Fen,Liu; Jing-Xiao,Lu
Fonte: Sociedade Brasileira de Física Publicador: Sociedade Brasileira de Física
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/09/2008 EN
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714.094%
Aluminum-doped zinc oxide (AZO) films were prepared on glass substrate by mid-frequency direct current reactive magnetron sputtering (MF-DC-MS). The influence of surface texture by NH4Cl aqueous solution on the surface morphology, electrical and optical properties of the AZO films was systematically investigated by scanning electron microscope, four-point probe and ultraviolet-visible-near infrared spectrophotometer, respectively. The results indicate that textured AZO film obtains a better texture surface for light trapping. The reflectivity for textured AZO film decreases drastically in visible light region and the electrical resistivity increases, which can be explained by the textured surface morphology of AZO film. The results above prove that NH4Cl aqueous solution is an appropriate candidate for AZO wet etching because of its easy control and relatively low cost.

Allelopathic effect of melissa, lemongrass, lavender and rosemary on germination and vigor of lettuce seeds; Efeito alelopático de melissa, capim-cidreira, lavanda e alecrim na germinação e vigor de sementes de alface

Teixeira, Daniela Aparecida; UNESP-Campus Botucatu; Bonfim, Filipe Pereira Giardini; UNESP/FCA- Botucatu
Fonte: Universidade Federal de Santa Catarina Publicador: Universidade Federal de Santa Catarina
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; Formato: application/pdf
Publicado em 29/09/2014 POR
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192.25957%
http://dx.doi.org/10.5007/2175-7925.2014v27n4p37The objective of this study was to evaluate the influence of four herbal plants on the germination and vigor of lettuce seeds, using aqueous preparations and teas of Melissa officinalis L. (melissa), Rosmarinus officinalis L. (rosemary), Lavandula angustifolia Mill. (lavender) and Cymbopogon citratus (DC.) Stapf. (lemongrass). A randomized complete block design was used with 9 treatments and 4 repetitions. The treatments were: melissa tea, melissa aqueous preparation, rosemary tea, rosemary aqueous preparation, lavender tea, lavender aqueous preparation, lemongrass tea, lemongrass aqueous preparation and control. The variables evaluated were: germination speed index, percentage of abnormal plants, percentage of germinated plants, fresh matter, dry matter, shoot length and radicle length. Lemongrass showed negative allelopathic effects on germination and vigor of L. sativa L. Melissa tea had a stimulatory effect.; http://dx.doi.org/10.5007/2175-7925.2014v27n4p37Objetivou-se, neste estudo, avaliar a influência na germinação e vigor de sementes de alface (Lactuca sativa L.) de macerados e infusões de Melissa officinalis L. (melissa), Rosmarinus officinalis L. (alecrim), Lavandula angustifolia Mill. (lavanda) e Cymbopogon citratus (DC.) Stapf. (capim-cidreira). O delineamento estatístico utilizado foi inteiramente casualizado...