Materials doping through sol–gel chemistry: a little something can make a big difference

Nédélec, Jean-Marie; Courthéoux, Laurence; Jallot, Édouard; Kinowski, C.; Lao, Jonathan; Laquerrière, Patrice; Mansuy, Christelle; Renaudin, Guillaume; Turrell, S.

doi:10.1007/s10971-007-1665-0

Cited by 65 publications

(39 citation statements)

References 59 publications

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“…Huang et al [28] reported a template-free sol-gel technique for controlled growth of ZnO nanorod arrays. Compared with other techniques, solgel process provides the great potentiality for the production of materials with homogeneous chemical composition [29]. The control over the alignment of nanostructures is still under investigation in the field of 1D materials fabrication.…”

Section: Introductionmentioning

confidence: 99%

Effect of Sn doping on structural, optical, electrical and wettability properties of oriented ZnO nanorod arrays

Kumar

Nagaraja

2013

J Mater Sci: Mater Electron

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Herein we present a modified sol gel route for the one step fabrication of oriented ZnO nanorod arrays. The method is seed layer free, and nanorods directly attach to a substrate. We also present the effect of tin (Sn) content on the crystallinity, microstructural, optical and electrical properties of the ZnO nanorod arrays. Thermo gravimetric (TG) curves of gel precursors showed that most of the organic groups and other volatiles were removed at about 450°C. X-ray diffraction patterns confirmed that the films were polycrystalline in nature with (002) preferred orientation. The texture coefficient, grain size, dislocation density and lattice parameters of the ZnO arrays were determined. The SEM micrographs revealed that the undoped and 1 at.%Sn doped films were composed of nanorods and the concentration of 2 at.%Sn doping hindered the rod like structure growth and modulated into granular nature. UVvisible transmission spectroscopy indicated that the transparency of the films increased with Sn content. On Sn doping, the films also exhibited a red shift and slight shrinkage of band gap. The electrical studies revealed that 1 at.% of Sn doping enhanced electrical conduction in ZnO films and beyond that the distortion caused in the lattice reduced the conductivity. The contact angle of the ZnO nanostructures varied between 91°and 115°depending upon the Sn content. Therefore, 1 at.%Sn doping into ZnO nanorods improves the crystallinity, electrical conductivity and water contact angle.

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Section: Introductionmentioning

confidence: 99%

Effect of Sn doping on structural, optical, electrical and wettability properties of oriented ZnO nanorod arrays

Kumar

Nagaraja

2013

J Mater Sci: Mater Electron

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“…On the other hand, the doping technique has been widely used to adjust the crystal structure of RE-based bulk materials, such as strontium-barium niobates [41], titanates [42], oxyorthosilicates [43], orthoborates [44], manganites [45], and intermetallic compounds [46]. In 1991, Blasse et al observed that 50% La doping could induce a complete trigonal to orthorhombic phase transition in bulk GdF 3 crystals [47].…”

Section: Introductionmentioning

confidence: 99%

Dopant-controlled synthesis of water-soluble hexagonal NaYF4 nanorods with efficient upconversion fluorescence for multicolor bioimaging

et al. 2010

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A novel strategy is proposed to directly synthesize water-soluble hexagonal NaYF 4 nanorods by doping rare-earth ions with large ionic radius (such as La 3+ ), and the dopantcontrolled growth mechanism is studied. Based on the doping effect, we fabricated water-soluble hexagonal NaYF 4 :(Yb,Er)/La and NaYF 4 :(Yb,Er)/Ce nanorods, which exhibited much brighter upconversion fluorescence than the corresponding cubic forms. The sizes of the nanorods can be adjusted over a broad range by changing the dopant concentration and reaction time. Furthermore, we successfully demonstrated a novel depth-sensitive multicolor bioimaging for in vivo use by employing the as-synthesized NaYF 4 :(Yb,Er)/La nanorods as probes.

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“…Hence, growth of the crystal has always been regarded as impossible, unless its phase transformation problem can be solved. Nedelec et al [17] once proposed that doping with rare earth ions can prevent the phase transformation in LuBO 3 , but so far the specific rare earth ions that can stabilize the calcite phase or vaterite phase were not obtained. Just when LuBO 3 crystal research got into difficulties, Sc 3+ was reported to be a phase stabilizing ion and Lu 0.9 Sc 0.1 BO 3 :Ce single crystals were successfully obtained, even though the relative light yield of the crystal was less than 60% of BGO [18].…”

Section: Introductionmentioning

confidence: 99%

The influence of Sc/Lu ratio on the phase transformation and luminescence of cerium-doped lutetium scandium orthoborate solid solutions

Ding

Pan

et al. 2011

Journal of Alloys and Compounds

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Materials doping through sol–gel chemistry: a little something can make a big difference

Cited by 65 publications

References 59 publications

Effect of Sn doping on structural, optical, electrical and wettability properties of oriented ZnO nanorod arrays

Effect of Sn doping on structural, optical, electrical and wettability properties of oriented ZnO nanorod arrays

Dopant-controlled synthesis of water-soluble hexagonal NaYF4 nanorods with efficient upconversion fluorescence for multicolor bioimaging

The influence of Sc/Lu ratio on the phase transformation and luminescence of cerium-doped lutetium scandium orthoborate solid solutions

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