1,721,096 research outputs found
Formation Of A Novel Polypyrrole/porous Phosphate Glass Ceramic Nanocomposite
Full text linkThis work is concerned with evidences of a new composite system, formed by in situ polimerization of pyrrole moieties in the copper-exchanged pore surface of LiTi2(PO4)3 glass ceramic.102167168Ruiz-Hitzky, E., Aranda, P., (1997) An. Quim. Int. Ed., 93, p. 197Maia, D.J., Zarbin, A.J.G., Alves, O.L., De Paoli, M.-A., (1995) Adv. Mater., 7, p. 792Zarbin, A.J.G., De Paoli, M.-A., Alves, O.L., (1997) Synth. Met., 84, p. 107Zarbin, A.J.G., De Paoli, M.-A., Alves, O.L., (1999) Synth. Met., 99, p. 227Tarte, P., Rulmont, A., Merckaert-Ansay, C., (1986) Spectrochim. Acta, 42 A, p. 1009Hosono, H., Zhang, Z., Abe, Y., (1989) J. Am Ceram. Soc., 72, p. 1587Furukawa, Y., Tazawa, S., Fujii, Y., Harada, I., (1988) Synth. Met., 24, p. 32
Nucleation And Growth Of Cdte1-xsx Nanocrystals Embedded In A Borosilicate Glass. Effects Of Sulfur Content And Two-step Thermal Annealing
No full textNucleation and growth of CdTe1-xSx nanocrystals embedded in a borosilicate glass matrix and submitted to isothermal annealing were studied by small-angle X-ray scattering (SAXS). Two different sulfur contents (x=0.3 and x=0.7) were investigated. The formation and growth of the nanocrystals was studied in situ, maintaining the samples at a constant temperature (560 °C) inside a high-temperature cell. The effect of a nucleation pretreatment at 460 °C on the characteristics of nanocrystal formation and growth was also studied. The experimental results demonstrate that, in composites with high sulfur content (x=0.7), nanocrystals grow during the isothermal annealing by coarsening of preformed small crystals. In glasses with low sulfur content (x=0.3), nanocrystals grow by progressive diffusion of Cd, Te and S atoms initially dispersed in the glass matrix. © 2001 Elsevier Science B.V. All rights reserved.293-2951517526Neto, J.A.M., Barbosa, L.C., Cesar, C.L., Alves, O.L., Galembeck, F., (1991) Appl. Phys. Lett., 59, p. 2715Craievich, A.F., Alves, O.L., Barbosa, L.C., (1993) J. Phys., 3, p. 373Craievich, A.F., Alves, O.L., Barbosa, L.C., (1995) Rev. Sci. Instrum., 66, p. 1338Bernardes, A., Tolentino, H., Rodrigues, A.R.D., Craievich, A.F., Torriani, I., (1992) Rev. Sci. Instrum., 63, p. 1065Kellermann, G., Vicentin, F., Tamura, E., Rocha, M., Tolentino, H., Barbosa, A., Craievich, A.F., Torriani, I., (1997) J. Appl. Cryst., 30, p. 880Potter B.G., Jr., Simmons, J.H., (1991) Phys. Rev. B, 43, p. 2234Glatter, O., Kratky, O., (1982) Small Angle X-ray Scattering, , Academic Press, LondonGuinier, A., Fournet, G., (1955) Small-angle Scattering of X-rays, , Wiley, New YorkSvergun, D.I., Semenyuk, A.V., Feigin, L.A., (1988) Acta Crystallogr. A, 44, p. 244Svergun, D.I., (1992) J. Appl. Cryst., 25, p. 495Christian, J.W., (1975) The Theory of Transformations in Metals and Alloys, , Pergamon, New YorkLifshitz, I.M., Slyozov, V.V., (1961) J. Phys. Chem. Solids, 19, p. 35Liu, Y., Reynoso, V.C.S., Royas, R.F.C., Brito Cruz, C.H., Cesar, C.L., Alves, O.L., (1996) J. Mater. Sci. Lett., 15, p. 98
Polyaniline Intercalation In α-sn(hpo4)2.h2o
No full textIn this work we report the preparation of a inorganic-organic nanocomposite, obtained by the in situ oxidative polymerization of aniline inside the layers of α-Sn(HPO4)2.H2O (α-SnP). Two approaches were used to obtain the α-SnP/polyaniline nanocomposite. Firstly, hydrogen atoms of α-SnP were exchanged with Fe3+ cation to promote aniline polymerization. Secondly, aniline was intercalated in α-SnP and polymerization was performed by (NH4)2S2O8 solution. Both resulting material leads to formation of polyaniline in its conducting form, the emeraldine salt. The characterization results suggest the formation of linear polymer chains between the α-SnP layers.1021-312771278Geniès, E.M., Boyle, A., Lapkowski, M., Tsintavis, C., (1990) Synth. Met., 36, p. 139Enzel, P., Bein, T., (1989) J. Phys. Chem., 93, p. 6270Maia, D.J., Zarbin, A.J.G., Alves, O.L., De Paoli, M.-A., (1995) Adv. Mater., 7, p. 792Zarbin, A.J.G., De Paoli, M.-A., Alves, O.L., (1997) Synth. Met., 84, p. 107Maia, D.J., Alves, O.L., De Paoli, M.-A., (1997) Synth. Met., 90, p. 37Whittinghan, M.S., Jacobson, A.J., (1982) Intercalation Chemistry, p. 147. , Academic PressConstantino, U., Gasperoni, A., (1970) J. Chromatogr., 51, p. 289Furukawa, Y., Hara, T., Hyodo, Y., Harada, I., (1986) Synth. Met., 16, p. 189Geniès, E.M., Lapkowski, M., Penneau, J.F., (1988) J. Electroanal. Chem., 249, p. 9
Size-controllable Synthesis And Characterization Of Wide Band Gap Semiconductor Oxide Nanoparticles
No full textThe preparation of nanoparticles dispersed into solid hosts is nowadays attracting scientific and technological interest because the properties of these hybrid systems are different and often improved, compared with their isolated counterparts. In this chapter we revise the synthesis of controlled-size semiconductor oxide nanoparticles based on the impregnation and decomposition of transition-metal 2-ethylhexanoate-based precursors in mesoporous hosts aiming to prepare MO2 (M = Ti, Ce, and Sn). The pore size of the host material can control the size of the guest material synthesized within it. The linear mass gain for each cycle in the synthesis process is an advantage of this method, because it allows the control of nanoparticle growth via a layer-by-layer assembly. We discuss the results of X-ray diffraction, transmission electron microscopy, and Raman spectroscopy for SnO2, TiO2 and CeO2 nanocrystals. Raman spectroscopy dependence on nanocrystal size allows the use of this technique as prompt characterization tool for estimating nanocrystal size. © 2010 by Nova Science Publishers, Inc. All rights reserved.295321Moriarty, P., (2001) Rep. Prog. Phys, 64, pp. 297-381Burda, C., Chen, X.B., Narayanan, R., El-Sayed, M.A., (2005) Chem. Rev, 105, pp. 1025-1102Wang, Y., Herron, N., (1991) J. Phys. Chem, 95, pp. 525-532Trindade, T., O'Brien, P., Pickett, N.L., (2001) Chem. Mater, 13, pp. 3843-3858Murray, C.B., Kagan, C.R., Bawendi, M.G., (2000) Annu. Rev. Mater. Sci, 30, pp. 545-610Preining, O.J., (1998) Aerosol Sci, 29, pp. 481-495Cassagneau, T., Hix, G.B., Jones, D.J., Torres, P.M., Rhomari, M., Rozière, J., (1994) J. Mater. Chem, 4, pp. 189-195Chanèac, C., Tronc, E., Jolivet, J.P., (1996) J. Mater. 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Solids, 319, pp. 154-162Cao, G., Rabenberg, L.K., Nunn, C.M., Mallouk, T.E., (1991) Chem. Mater, 3, pp. 149-156Zarbin, A.J.G., Vargas, M.D., Alves, O.L., (1999) J. Mater. Chem, 9, pp. 519-523Maia, D.J., De Paoli, M.A., Alves, O.L., Zarbin, A.J.G., Neves, S., (2000) Quím. Nova, 23, pp. 204-215Gimenez, I.F., Alves, O.L., (2002) Glass Technol, 43 C, pp. 166-169Sotomayor, P.T., Raimundo Jr., I.V., Zarbin, A.J.G., Rohwedder, J.J.R., Oliveira Neto, G., Alves, O.L., (2001) Sens.Actuators B, 74, pp. 157-162Khushalani, D., Hasenzahl, S., Mann, S., (2001) J. Nanosci. Nanotechnol, 1, pp. 129-132Wang, S.P., Westcott, S., Chen, W., (2002) J. Phys. Chem. B, 106, pp. 11203-11209Mazali, I.O., Alves, O.L., (2001) J. Mater. Sci. Lett, 20, pp. 2113-2117Volf, M.B., Technical approach to glass (1990), Elsevier : AmsterdamAlves, O.L., Ronconi, C.M., Galembeck, A., (2002) Quím. Nova, 25, pp. 69-77Mazali, I.O., Alves, O.L., (2005) J. Phys. Chem. Solids, 66, pp. 37-46Mazali, I.O., Souza Filho, A.G., Neto, B.C.V., Mendes Filho, J., Alves, O.L., (2006) J. Nanoparticle Res, 8, pp. 141-148Mazali, I.O., Romano, R., Alves, O.L., (2006) Thin Solid Films, 495, pp. 64-67Mazali, I.O., Viana, B.C., Alves, O.L., Mendes Filho, J., Souza Filho, A.G., (2007) J. Phys. Chem. Solids, 68, pp. 622-627Cangussu, D.C.C., Nunes, W.C., Correa, H.L.S., Knobel, M., Macedo, W.A.A., Alves, O.L., Souza Filho, A.G., Mazali, I.O., (2009) J. Appl. Phys, 105, pp. 013901-013907Mazali, I.O., Alves, O.L., (2004) J. Mater. Sci, 39, pp. 1987-1995www.corning.com/docs/specialtymaterials/pisheets/Vycor%207930.pdf, Available inVest, R.W., (1990) Ferroelectrics, 102, pp. 53-68Vest, R.W., Singaram, S., (1986) Mater. Res. Soc. Symp. Proc, 60, pp. 35-42Hagemeyer, A., Hogan, Z., Schlichter, M., Smaka, B., Streukens, G., Turner, H., Volpe Jr., A., Yaccato, K., (2007) Appl. Catal. 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Integrated Chemical Systems Built Using Nanoporous Glass/ceramics As Substrates
No full textIt is well known that nanocrystals exhibit great instabilities associated with their high surface energy. In this concern, nanocrystals grown inside the cavities of a porous host become an attractive integrated chemical system (ICS) because certain processes can be performed in a restricted environment where porous act as nanoreactors. In this work we report the synthesis and characterization of nanosized semiconductors SnO2 and CdS dispersed in porous monoliths. The former was obtained dispersed in porous Vycor glass (PVG) and α-NbPO5 glass-ceramic, and the latter in PVG. It was observed that the semiconductor crystallites incorporated in porous monoliths are smaller than those obtained for free precursors decompositions. © 2005 Elsevier B.V. All rights reserved.49501/02/156467Wang, Y., Herron, N., (1991) J. Phys. Chem., 95, p. 525Pan, L., Pingsheng, H., Gang, Z., Dazhu, C., (2003) Mater. Lett., 58, p. 176McAleer, J.F., Mosely, P.T., Norris, J.O.W., Willians, N.E., (1978) J. Chem. Soc., Faraday Trans., 83, p. 1323Hong, S.J., Han, J.I., (2004) Sens. Actuators, A, Phys., 112, p. 80Cassagneau, T., Hix, G.B., Jones, D.J., Torres, P.M., Rhomari, M., Rozière, J., (1994) J. Mater. Chem., 4, p. 189Chanèac, C., Tronc, E., Jolivet, J.P., (1996) J. Mater. Chem., 6, p. 1905Bard, A.J., (1994) Integrated Chemical Systems-A Chemical Approach to Nanotechnology, , John Wiley & Sons New YorkO'Brien, P., Malik, M.A., Chunggaze, M., Trindade, T., Walsh, J.R., Jones, A.C., (1997) J. Cryst. Growth, 170, p. 23Mazali, I.O., Alves, O.L., (2001) J. Mater. Sci. Lett., 20, p. 2113Mazali, I.O., Barbosa, L.C., Alves, O.L., (2004) J. Mater. Sci., 39, p. 1987Volf, M.B., (1990) Technical Approach to Glass, , Elsevier AmsterdamTrindade, T., O'Brien, P., Zhang, X., Motevalli, M., (1997) J. Mater. Chem., 7, p. 1011Jenkins, R., Snyder, R.L., (1996) Introduction to X-ray Powder Diffractometry, , John Wiley & Sons London(1973) Powder Diffraction File Search Manual-inorganic, , Published by the Joint Committee on Powder Diffractions Standards, Pennsylvania, (a) Card 41-1445 (b) Card 41-104
Micro-raman Spectroscopy Studies Of The Phase Separation Mechanisms Of Transition-metal Phosphate Glasses [estudo Por Espectroscopia Micro-raman Dos Mecanismos De Separação De Fase Em Vidros Fosfatos De Metais De Transição]
No full textGlass-ceramics are prepared by controlled separation of crystal phases in glasses, leading to uniform and dense grain structures. On the other hand, chemical leaching of soluble crystal phases yields porous glass-ceramics with important applications. Here, glass/ceramic interfaces of niobo-, vanado- and titano-phosphate glasses were studied by micro-Raman spectroscopy, whose spatial resolution revealed the multiphase structures. Phase-separation mechanisms were also determined by this technique, revealing that interface composition remained unchanged as the crystallization front advanced for niobo- and vanadophosphate glasses (interface-controlled crystallization). For titanophosphate glasses, phase composition changed continuously with time up to the equilibrium composition, indicating a spinodal-type phase separation.32719561960Alves, O.L., Gimenez, I.F., Mazali, I.O., (2001) Química Nova Na. Escola, , Caderno Temático - Materiais(1996) Raman Microscopy: Developments and Applications, , Turrell, G.Corset, J., eds.Academic Press: LondonAnderson, M.E., Mugli, R.Z., (1981) Anal. Chem., 53, p. 1772Smith, G.D., Clark, R.J.H., (2004) J. Archaeol Sci., 31, p. 1137Sala, O., (2007) Quim. Nova, 30, p. 1773Sala, O., (2007) Quim. Nova, 30, p. 2057Sala, O., (2008) Quim. Nova, 31, p. 914Faria, D.L.A., Souza, M.A., (1999) J. Raman Spectrosc., 30, p. 169Kalasinsky, K.S., Kalasinsky, V.R., (2005) Spectrochim. Acta A, 61, p. 1707Vandenabeele, P., Castro, K., Hargreaves, M., Moens, L., Madariaga, J.M., Edwards, H.G.M., (2007) Anal. Chimn. Acta, 588, p. 108Maier, M.S., Paria, D.L.A., Boschin, M., Parera, S.D., Bernal, M.R.D., (2007) Vibrat. Spectrosc, 44, p. 182Faria, D.L.A., Edwards, H.G.M., Villar, S.J., David, A.R., (2004) Anal. Chim. Acta, 503, p. 223Coloraban, P., (2004) Appl. Phys. A, 79, p. 167Gouadec, G., Coloraban, P., (2007) Prog. Crys. Growth Charact. Mater., 53, p. 1Mazali, I.O., Alves, O.L., (2004) J. Braz. Chem. Soc., 15, p. 464Mazali, I.O., Alves, O.L., (2001) J. Mater. Sci Lett., 20, p. 2113Mazali, I.O., Alves, O.L., (2001) J. Phys. Chem. Solids, 62, p. 1251Sugita, H., Tomna, T., Benino, Y., Tomatsu, T., (2007) Solid State Commun., 143, p. 280Koshiba, K., Tomna, T., Benino, Y., Tomatsu, T., (2007) Appl. Phys. A, 89, p. 981Avansi, W., Mastelaro, V.R., Andreeta, M.R.B., (2008) J. Non-Cryst. Solids, 354, p. 279Strnad, Z., (1986) Glass-Ceramic Materials., , Elsevier: AmsterdamMazurin, O.V., (1984) Phase Separation in Glass., , Elsevier: AmsterdamAvrami, M., (1939) J. Chem. Phys., 7, p. 1103Hosono, H., Abe, Y., (1995) J. Non-Cryst. Solids, 190, p. 185Yamamoto, K., Kasuga, T., Abe, Y., (1997) J. Am. Ceram. Soc., 80, p. 822Brow, R.K., Tallant, D.R., Warren, W.L., McIntyre, A., Day, D.E., (1997) Phys. Chem. Glasses, 38, p. 300Krimi, S., El Jazouli, A., Rabardel, L., Couzi, M., Mansouri, I., Le Flem, G., (1993) J. Solid. State Chem., 102, p. 400Tarte, P., Rulmont, A., Merckaert-Ansay, C., (1986) Spectrochim. Acta, 42 A, p. 1009Barj, M., Lucazeau, G., Delmas, C.J., (1992) Solid State Chem., 100, p. 141Mazali, I.O., Alves, O.L., (2005) J. Phys. Chem. Solids, 66, p. 37Waal, D., Hutter, C., (1994) Mater. Res. Bull, 29, p. 1129Bamberger, C.E., Begun, G., Cavin, O.B., (1988) J. Solid State Chem., 73, p. 317Aza, P.N., Santos, C., Pazo, A., Aza, S., Cuscó, R., Artús, L., (1997) Chem. Mater., 9, p. 912Beall, G.H., MacDowell, J.R., (1988) Chemtech., 11, p. 673MacMillan, P.W., (1979) Glass-Ceramics, , 2nd ed., Academic: LondonDoremus, R.H., (1994) Glass Science, , 2nd ed., Wiley: New YorkEl Jazouli, A., Parent, C., Dance, J.M., Le Flem, G., Hagenmuller, P., (1988) J. Solid State Chem., 74, p. 377El Jazouli, A., Parent, C., Viala, J.C., Le Flem, G., Hagenmuller, P., (1988) J. Solid State Chem., 74, p. 433Vedeanu, N., Cozar, O., Ardelean, I., Magdas, D.A., (2008) Vib. Spectrosc., 48, p. 259Kristallov, L.V., Fotiev, A.A., Tsvetkova, M.P., (1982) Russ. J. Inorg. Chem., 27, p. 1714Grzechnik, A., (1998) Chem. Mater., 10, p. 103
A Study On The Formation Of A Porous Morphology In Cd2sno 4 Thin Films Prepared By Mod Process
No full textTransparent and conductive Cd2SnO4 films were prepared by Metallorganic Decomposition technique. Cadmium and tin 2-ethylhexanoates were dissolved in xylene and 2-ethylhexanoic acid, respectively, and the solution formed was used as precursor. The films were deposited by dip coating on borosilicate glass and quartz, and annealed at 600 and 620°C. Films with high uniformity, thickness of 350 nm, optical transmission higher than 92% (Eg ∼ 3.06 eV), and resistivity c.a. 10 -3 Ω.cm were obtained. The nature of solvent is important to control the film morphologies.374275280Lewis, B.G., Paine, D.C., (2000) MRS Bull., 25, p. 22Haacke, G., (1976) J. Appl. Phys., 47, p. 4082Ginley, D.S., Bright, C., (2000) MRS Bull., 24, p. 15Alves, O.L., Ronconi, C.M., Galembeck, A., (2001) Quim. Nova, , in pressGalembeck, A., Alves, O.L., (2000) Thin Solid Films, 365, p. 90Siegel, L.A., (1978) J. Appl. Cryst., 11, p. 284Moss, T.S., (1954) Proc. Phys. Soc. A., 382, p. 775Burstein, E., (1954) Phys. Rev., 93, p. 632Wu, X., Mulligan, W.P., Coutts, T.J., (1996) Thin Solid Films, 286, p. 27
Metallo-organic Decomposition: A Chemical Approach To Thin Film Deposition [decomposição De Precursores Metalorgânicos: Uma Técnica Química De Obtenção De Filmes Finos]
No full textThis review focus the more relevant foundations and applications of the Metallo-Organic Decomposition (MOD) technique, mainly within the last decade. The technique has grown significantly, mainly due to the good results concerning the preparation of multicomponent oxide systems with composition, structural and morphologic control, in a relatively simple way. This opened new opportunities to obtain materials with well-defined electrical and optical properties.2516977De Oliveira, S.C., Torresi, R.M., De Torresi, S.I.C., (2000) Quim. Nova, 23, p. 79Olivi, P., Pereira, E.C., Longo, E., Varella, J.A., Bulhões, L.O.S., (1993) J. Electrochem. Soc., 140, pp. L81Rudiono, Kaneko, F., Takeuchi, M., (1999) Appl. Surf. Sci., 142, p. 598Nogueira, A.F., De Paoli, M.A., (2000) Sol. Energ. Mat. Sol. Cells, 61, p. 135Zhang, H.X., Kam, C.H., Zhou, Y., Han, X.Q., Xiang, Q., Buddhudu, S., Lam, Y.L., Chan, Y.C., (2000) J. 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Multiple-step Preparation And Physicochemical Characterization Of Crystalline α-germanium Hydrogenphosphate
No full textThe reaction between germanium oxide and phosphoric acid has previously been described and led to impure germanium hydrogenphosphate samples with low crystallinity. A new multiple-step route involving the same reaction under refluxing and soft hydrothermal conditions is described for the preparation of pure and crystalline α-GeP. The physicochemical characterization of the samples allows accompaniment of the reaction evolution as well as determining short- and long-range structural organization. The phase purity of the α-GeP sample was confirmed by applying Rietveld's profile analysis, which also determined the cell parameters of its crystals. © 2003 Elsevier Inc. All rights reserved.1774-515201528Clearfield, A., Stynes, J., (1964) J. Inorg. Nucl. Chem., 26, p. 117Clearfield, A., Smith, G.D., (1969) Inorg. Chem., 8, p. 431Alberti, G., (1978) Acc. Chem. Res., 11, p. 163Herzog-Cance, M.H., Jones, D.J., El-Mejjad, R., Rozière, J., Tomkinson, J., (1992) J. Chem. Soc. Faraday Trans., 88, p. 2275Pillion, J.E., Thompson, M.E., (1991) Chem. Mater., 3, p. 777Maia, D.J., De Paoli, M.A., Alves, O.L., Zarbin, A.J.G., Das Neves, S., (2000) Quim. Nova, 23, p. 204Ding, Y., Jones, D.J., Maireles-Torres, P., Rozière, J., (1995) Chem. Mater., 7, p. 562Chao, K.J., Chang, T.C., Ho, S.Y., (1993) J. Mater. Chem., 3, p. 427Cao, G., Mallouk, T.E., (1991) J. Solid State Chem., 94, p. 59Gonçalves, A.B., Mangrich, A.S., Zarbin, A.J.G., (2000) Synth. Metals, 114, p. 119Maia, D.J., Alves, O.L., De Paoli, M.-A., (1997) Synth. Metals, 90, p. 37Zarbin, A.J.G., Maia, D.J., De Paoli, M.-A., Alves, O.L., (1999) Synth. Metals, 102, p. 1277Everest, D.A., (1953) J. Chem. Soc., 4, p. 4117Lelong, B., (1964) Ann. Chim. France, 9, p. 229Avduevskaya, K.A., Tananaev, I.V., (1963) Russ. J. Inorg. Chem., 8, p. 527Avduevskaya, K.A., Tananaev, I.V., (1965) Russ. J. Inorg. Chem., 10, p. 197Winkler, A., Thilo, E., (1966) Z. Anorg. Allg. Chem., 346, p. 92La Ginestra, A., Galli, P., Berardelli, M.L., Massucci, M.A., (1984) J. Chem. Soc. Dalton Trans., 4, p. 527Christensen, A.N., Andersen, E.K., Andersen, I.G.K., Alberti, G., Nielsen, M., Lehman, M.S., (1990) Acta Chem. Scand., 44, p. 865Troup, J.M., Clearfield, A., (1977) Inorg. Chem., 16, p. 3311Patrono, P., La Ginestra, A., Ferragina, C., Massucci, M.A., Frezza, A., Vecchio, S., (1992) J. Thermal Anal., 38, p. 2603Hayashi, H., Torii, K., Nakata, S., (1997) J. Mater. Chem., 7, p. 557Galli, P., La Ginestra, A., Berardelli, M.L., Massucci, M.A., Patrono, P., (1985) Thermochim. Acta, 92, p. 615La Ginestra, A., Patrono, P., Frezza, A., Mancini, C., Massucci, M.A., Vecchio, S., (1993) J. Thermal Anal., 40, p. 1223Rodríguez-Carvajal, J., (1993) Phys. B, 192, p. 55Berry, L.G., Post, B., Weissmann, S., McGurdie, H.F., McClune, W.F., (1973) Powder Diffraction File Search Manual - Inorganic, , Joint Committee On Powder Diffractions Standards, PennsylvaniaCostantino, U., La Ginestra, A., (1982) Thermochim. Acta, 52, p. 179Albertsson, J., Oskarsson, A., Tellgren, R., Thomas, J.O., (1977) J. Phys. Chem., 81, p. 1574Clayden, N.J., (1987) J. Chem. Soc. Dattton Trans., 8, p. 1877MacLachlan, D.J., Morgan, K.R., (1990) J. Phys. Chem., 94, p. 7656Nakayama, H., Eguchi, T., Nakamura, N., Yamagushi, S., Daniyo, M., Tsuako, M., (1997) J. Mater. Chem., 7, p. 1063Horsley, S.E., Nowell, D.V., Stewart, D.T., (1974) Spectrochim. Acta a, 30, p. 535Dushin, R.B., Krylov, V.N., Larina, K.P., Nikolskii, B.P., (1977) Bull Acad. Sci. USSR, 3, p. 469Corbridge, D.E.C., (1970) Topics in Phosphorous Chemistry, p. 241. , M. Grayson, & E.J. Griffith. New York: Wile
Cdte Quantum Dots By Melt Heat Treatment In Borosilicate Glasses
No full textCdTe quantum dots in borosilicate glasses were produced and their growth kinetics, the effects of quantum confinement for electrons and phonons and the time resolved optical transmission were studied. Quantum dots in the range of 10 to 25 Å with a 5% size dispersion were grown. The growth kinetics were studied by small angle X-ray scattering using synchrotron light. A spherical k · p model for the electron confinement explains absorption data and selection rules, and a dielectric continuum model for the phonon confinement could explain the resonant longitudinal and surface optical phonons, as well as their overtone combinations. The time response of absorption was studied by a pump-probe measurement on the femtosecond time scale. For samples showing a large amount of surface traps the recovery time can be as fast as 300 fs, while for an almost surface trap free sample it remains on the 1-3 ps time scale. © 1997 Elsevier Science B.V.219205211Efros, A.L., Efros, A.L., (1982) Sov. Phys. Semicond., 16, p. 772Ekimov, A.I., Onushchenko, A.A., (1982) Sov. Phys. Semicond., 16, p. 775Warnock, J., Awschalom, D.D., (1985) Phys. Rev., B32, p. 5529Potter, B.G., Simmons, J.H., (1988) Phys. Rev., B37, p. 10838Borrelli, N.F., Hall, D.W., Holland, H.J., Smith, D.W., (1987) J. Appl. Phys., 61, p. 5399Banyai, L., Hu, Y.Z., Lindberg, M., Koch, S.W., (1988) Phys. Rev., B38, p. 8142Peyghambarian, N., Fluegel, B., Hulin, D., Migus, A., Joffre, M., Antonetti, A., Koch, S.W., Lindberg, M., (1989) IEEE J. Quant. Elect., 25, p. 2516Alivisatos, A.P., Colvin, V.L., Goldstein, A.N., Olshavsky, M.A., Shiang, J.J., (1990) Physical Phenomena in Granular Materials, p. 870. , ed. T.H. Geballe, G.C. Cody and P. Sheng Materials Research Society, Pittsburg, PARighini, G.C., (1996) Proc. SPIE, Optics for Science and New Technology, 2778Mackenzie, J.D., Ulrich, D.R., (1990) SPIE Proc. Sol-Gel Optics, 1328, p. 2Nasu, H., Tsunetomo, K., Tokumitsu, Y., Osaka, Y., (1989) Jap. J. Appl. Phys., 25, pp. L862Ekimov, A.I., Onushchenko, A.A., (1982) Sov. Phys. Semicond., 16, p. 775Neto, J.A.M., Barbosa, L.C., Alves, O.L., Garrido, F.M.S., (1991) Proc. 2nd Int. Ceram. Sci. Tech., Ceram. Trans., 20, p. 161Reynoso, V.C.S., De Paula, A.M., Cuevas, R.F., Medeiros Neto, J.A., Alves, O.L., Cesar, C.L., Barbosa, L.C., (1995) Electr. Lett., 31, p. 1013Tsunetomo, K., Ohtsuka, S., Koyama, T., Tanaka, S., Sasaki, F., Kobayashi, S., (1995) Nonlinear Opt., 13, p. 109Medeiros Neto, J.A., Barbosa, L.C., Cesar, C.L., Alves, O.L., Galembeck, F., (1991) Appl. Phys. Lett., 59, p. 2715Esch, V., Fluegel, B., Khitrova, G., Gibbs, H.M., Jiang, Xu., Kang, K., Koch, S.W., Peyghanbarian, N., (1990) Phys. Rev., B42, p. 7450Liu, Y., Reynoso, V.C.S., Barbosa, L.C., Brito Cruz, C.H., Cesar, C.L., Fragnito, H.L., Alves, O.L., (1996) J. Mater. Sci. Lett., 15, p. 142Craievich, A.F., Alves, O.L., Barbosa, L.C., (1993) J. Phys. (Paris) Colloq., C8, p. 373Craievich, A.F., Alves, O.L., Barbosa, L.C., (1995) Rev. Sci. Instrum., 66, p. 1338Reynoso, V.C.S., Liu, Y., Rojas, R.F.C., Aranha, N., Cesar, C.L., Barbosa, L.C., Alves, O.L., (1996) J. Mater. Sci. Lett., 15, p. 1037Liu, Y., Reynoso, V.C.S., Barbosa, L.C., Rojas, R.F.C., Fragnito, H.L., Cesar, C.L., Alves, O.L., (1995) J. Mater. Sci. Lett., 14, p. 635Liu, Y., Reynoso, V.C.S., Rojas, R.F.C., Brito Cruz, C.H., Cesar, C.L., Fragnito, H.L., Alves, O.L., Barbosa, L.C., (1996) J. Mater. Sci. Lett., 15, p. 892De Paula, A.M., Barbosa, L.C., Brito Cruz, C.H., Alves, O.L., Sajurjo, J.A., Cesar, C.L., (1996) Appl. Phys. Lett., 69, p. 357De Oliveira, C.R.M., De Paula, A.M., Plentz Filho, F.O., Medeiros Neto, J.A., Barbosa, L.C., Alves, O.L., Menezes, E.A., Cesar, C.L., (1995) Appl. Phys. Lett., 66, p. 439Fragnito, H.L., Rios, J.M.M., Duarte, A.S., Palange, E., Medeiros Neto, J.A., Cesar, C.L., Barbosa, L.C., Brito Cruz, C.H., (1993) J. Phys.: Condensed Mater., 5, pp. A179Paul, A., (1982) Chemistry of Glasses, p. 148. , Chapman and Hall, LondonDuffy, J.A., Ingram, M.D., (1976) J. Non-Cryst. Solids, 21, p. 373Yükselici, H., Persan, P.D., Hayes, T.M., (1995) Phys. Rev., B52, p. 11763Landau, L.D., Lifshitz, E.M., (1993) Physical Kinetics, p. 427. , Pergamon, OxfordTurnbull, D., (1956) Solid State Physics, p. 225. , ed. F. Seitz and D. Turnbull Academic Press, New YorkKoch, S.W., (1984) Lectures Notes in Physics, 207, p. 18. , Springer, BerlinChristian, J.W., (1981) The Theory of Transformations in Metals and Alloys, 2nd Ed., (PART I), p. 418. , Pergamon, OxfordBanyai, L., Koch, S.W., (1993) Semiconductor Quantum Dots, Series on Atomic, Molecular and Optical Physics, 2. , World Scientific, SingaporeLiu, L.C., Risbud, S.H., (1990) J. Appl. Phys., 68, p. 28Lifshitz, I.M., Slyozov, V.V., (1959) Sov. Phys. JETP, 35, p. 331Lifshitz, I.M., Slyozov, V.V., (1961) J. Phys. Chem. Solids, 19, p. 3
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