Preparation of helical CdS nanotubes using a sol–gel transcription approach

Zhang, Chuanyong; Huo, Hongjing; Li, Yi; Li, Baozong; Yang, Yonggang

doi:10.1016/j.matlet.2013.03.105

Cited by 17 publications

(13 citation statements)

References 41 publications

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“…Cadmium sulfide (CdS) is a II-VI semiconductor material with an optical band gap of 2.42 eV and a great diversity of applications, such as window layers for both CdTe and CuInGaSe 2 (CIGS)-based solar cells devices (Elbar, Tobbeche, & Merazga, 2015;Gerthoffer et al, 2015;Han et al, 2014;Lee et al, 2015;Li, & Liu, 2015;Mohamed, 2015;Yun, Cha, Ahn, Kwon, & Al-Ammar, 2014). The CdS/CdTe and CdS/CIGS heterojunction has been actively investigated as a photovoltaic junction, moreover, the CdS which acts as a window layer in the aforementioned solar cells has been deposited by many techniques such as sputtering (Kim, Kim, Choi, Park, & Lee, 2015), close space sublimation (CSS) (Cruz et al, 2013), chemical bath deposition (Yücel & Kahraman, 2015;Lisco et al, 2015), spray pyrolysis (Yilmaz, 2015), sol-gel, spin coating (Zhang, Huo, Li, Li, & Yang, 2013), thermal evaporation (Baghchesara, Yousefi, Cheraghizade, Jamali-Sheini, & Saáedi, 2016), ion beam sputtering (Liang et al, 2013) and many others. The CSS technique consists in a source of an evaporating material and a substrate which are separated by small distance in a controlled atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Nanocolumnar CdS thin films grown by glancing angle deposition from a sublimate vapor effusion source

Daza

Castro-Rodrı́guez

Cirerol-Carrillo

et al. 2017

Journal of Applied Research and Technology

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The glancing angle deposition (GLAD) technique was used to grow cadmium sulfide (CdS) thin films on glass and indium tin oxide (ITO)-coated glass substrates from a sublimate vapor effusion source. The samples were prepared under different incident deposition flux angles (α) of 0 • , 20 • and 80 • , while both the substrate and the source were under rotation. The temperature of the source was 923.15 K. Scanning electron microscopy images showed that the GLAD method combined with the source produced dense nanocolumnar structures with height and diameters of ∼200 and ∼30 nm, respectively. The deposited films displayed a hexagonal structure with preferential (002) plane orientation and crystallites sizes between ∼25 nm and ∼35 nm. A maximum solar weighted transmission of ∼92% was obtained for the sample prepared at α = 80 • , with a substrate/source rotation velocity ratio of 55/20 in the wavelength region of 400-900 nm. The average band-gap energy of the films was ∼2.42 eV. Refractive indexes between ∼1.4 and ∼2.4 at a 550 nm the wavelength was also obtained.

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Section: Introductionmentioning

confidence: 99%

Nanocolumnar CdS thin films grown by glancing angle deposition from a sublimate vapor effusion source

Daza

Castro-Rodrı́guez

Cirerol-Carrillo

et al. 2017

Journal of Applied Research and Technology

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“…During the past two decades, metal oxides have been shaped into a variety of nanosized structures . Among these nanostructures, the tubular nanostructures are the most attractive owing to the cavity and larger surface area compared with nanofibers.…”

Section: Introductionmentioning

confidence: 99%

Helical Mesoporous Tantalum Oxide Nanotubes: Formation, Optical Activity, and Applications

Yang

2017

The Chemical Record

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Nanomaterials with helical morphologies have attracted much attention owing to their potential applications as nanosprings, chirality sensors and in chiral optics. Single-handed helical Ta O nanotubes prepared through a supramolecular templating approach are described. The handedness is controlled by that of the organic self-assemblies of chiral low-molecular-weight gelators (LMWGs). The chiral LMWGs self-assemble into single-handed twisted nanoribbons through H-bonding, hydrophobic association, and π-π stacking. The Ta O nanotubes are formed by the adsorption and polycondensation of Ta O oligomers on the surfaces and edges of the twisted organic nanoribbons followed by removal of the template. The optical activity of the nanotubes is proposed to originate from the chiral defects on the inner surfaces of the tubular structures. Single-handed twisted LiTaO nanotubes can also be prepared using Ta O nanotubes.

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“…With the development of sol‐gel transcription using organogel templates, helical silica nanostructures have been prepared and used in asymmetric catalysis . Many single‐handed helical silicas, polysilsesquioxanes, and metal and semiconductor nanocrystals have been prepared through this approach . For single‐handed helical 4,4′‐biphenylene bridged polysilsesquioxane nanotubes/nanoribbons, handedness may be controlled by that of the organogelator self‐assembly.…”

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confidence: 99%

“…The mesopores were formed during the crystallization process. Recently, helical CdS tubes were also prepared with the sol‐gel transcription approach . For helical ZrO 2 nanotubes, the chiral defects were proposed to be the origin of optical activity .…”

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confidence: 99%

“…15 Many single-handed helical silicas, polysilsesquioxanes, and metal and semiconductor nanocrystals have been prepared through this approach. [16][17][18][19][20][21][22][23][24][25][26][27][28][29] For single-handed helical 4,4′-biphenylene bridged polysilsesquioxane nanotubes/nanoribbons, handedness may be controlled by that of the organogelator selfassembly. The twist of the biphenylene rings evidently was controlled by the organogelator chirality.…”

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Chirality of Single‐Handed Twisted Titania Tubular Nanoribbons Prepared Through Sol‐gel Transcription

Wang

Zhang

et al. 2015

Chirality

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Single-handed twisted titania tubular nanoribbons were prepared through sol-gel transcription using a pair of enantiomers. Handedness was controlled by that of the template. The obtained samples were characterized using field-emission electron microscopy, transmission electron microscopy, diffuse reflectance circular dichroism (DRCD), and X-ray diffraction. The DRCD spectra indicated that the titania nanotubes exhibit optical activity. Although the tubular structure was destroyed after being calcined at 700 °C for 2.0 h, DRCD signals were still identified. However, the DRCD signals disappeared after being calcined at 1000 °C for 2.0 h. The optical activity of titania was proposed to be due to chiral defects. Previous results showed that straight titania tubes could be used as asymmetric autocatalysts, indicating that titania exhibit chirality at the angstrom level. Herein, it was found that they also exhibit DRCD signals, indicating that there are no obvious relationships between morphology at the nano level and chirality at the angstrom level. The nanotube chirality should originate from the chiral defects on the nanotube inner surface. The Fourier transform infrared spectra indicated that the chirality of the titania was transferred from the gelators through the hydrogen bonding between N-H and Ti-OH.

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Preparation of helical CdS nanotubes using a sol–gel transcription approach

Cited by 17 publications

References 41 publications

Nanocolumnar CdS thin films grown by glancing angle deposition from a sublimate vapor effusion source

Nanocolumnar CdS thin films grown by glancing angle deposition from a sublimate vapor effusion source

Helical Mesoporous Tantalum Oxide Nanotubes: Formation, Optical Activity, and Applications

Chirality of Single‐Handed Twisted Titania Tubular Nanoribbons Prepared Through Sol‐gel Transcription

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