Quantitative analysis of lattice ordering in thin film opal‐based photonic crystals

Khunsin, Worawut; Kocher, G.; Romanov, S. G.; Torres, C. M. Sotomayor

doi:10.1002/adfm.200701431

Cited by 36 publications

(37 citation statements)

References 46 publications

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“…Previous work has identified the influence of deposition time at a given voltage, for opal template formation. 32 Additional deposition approaches involving white noise during dip-coating methods, 13,32,33 spin-coating techniques 34 or other assembly approaches to minimize crack formation have been reasonably successful. 33,[35][36][37][38] We have found that an increase in voltage to 2.5 or 3.0 V does affect ordering on a SS substrate (Figs.…”

Section: Resultsmentioning

confidence: 99%

3D Vanadium Oxide Inverse Opal Growth by Electrodeposition

Armstrong

O’Sullivan

O’Connell

et al. 2015

J. Electrochem. Soc.

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Three-dimensional vanadium pentoxide (V 2 O 5 ) material architectures in the form of inverse opals (IOs) were fabricated using a simple electrodeposition process into artificial opal templates on stainless steel foil using an aqueous solution of VOSO 4 .χH 2 O with added ethanol. The direct deposition of V 2 O 5 IOs was compared with V 2 O 5 planar electrodeposition and confirms a similar progressive nucleation and growth mechanism. An in-depth examination of the chemical and morphological nature of the IO material was performed using X-ray crystallography, X-ray photoelectron spectroscopy, Raman scattering and scanning/transmission electron microscopy. Electrodeposition is demonstrated to be a function of the interstitial void fraction of the artificial opal and ionic diffusivity that leads to high quality, phase pure V 2 O 5 inverse opals is not adversely affected by diffusion pathway tortuosity. Methods to alleviate electrodeposited overlayer formation on the artificial opal templates for the fabrication of the porous 3D structures are also demonstrated. Such a 3D material is ideally suited as a cathode for lithium ion batteries, electrochromic devices, sensors and for applications requiring high surface area electrochemically active metal oxides. The growth in portable electronics and the need for cleaner energy solutions has led to the rising interest in materials research and energy storage material architectures that may help drive advancement in energy storage technologies to mitigate current issues in some energy storage materials and batteries such as capacity fading and lower life times, for example. [1][2][3][4] In recent years, three-dimensional (3D) material architectures 5 have become a particularly attractive approach to achieving significant improvements in charge rate performance, maintenance of specific capacity and opportunities for higher power density supercapacitors. [6][7][8][9] For this reason, the development of synthesis routes for the fabrication of three-dimensional nanostructured active materials onto metallic current collector substrates is important. [10][11][12][13] Electrodeposition is a particularly facile route for the formation of metal and metal oxide films on a variety of conductive substrates and has recently gained a lot of attention for synthesising three-dimensional materials when combined with templates and sacrificial architecture-directing structures. [14][15][16][17] Vanadium pentoxide is a particularly attractive replacement cathode material with its mixed valence, V 4+ and V 5+ , making it an ideal candidate for a large number of redox-dependent applications. 23-26 While the lattice structure is theoretically maintained upon mild intercalation, phase changes are known to occur and the interlayer van der Waals spacing characteristic of its layered orthorhombic crystal structure can become deformed at lower voltages (higher Li mole fraction). 27,28 Large particle sizes can also limit the solid state diffusional rate of cation insertion. The growth of a porous, thre...

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Section: Resultsmentioning

confidence: 99%

3D Vanadium Oxide Inverse Opal Growth by Electrodeposition

Armstrong

O’Sullivan

O’Connell

et al. 2015

J. Electrochem. Soc.

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“…In our experiments we used an opal fi lm templates with improved crystallinity prepared in a vertically moving meniscus under white noise agitation of suspension. [ 81 ] Opal lattice is commonly described as a face centered cubic (fcc) package of touching spheres. In reality, the opal lattice is slightly stretched along the direction of pulling it out of suspension during crystallization.…”

Section: Opal On Metal -Towards Cavity Resonancementioning

confidence: 99%

Hybrid Colloidal Plasmonic‐Photonic Crystals

et al. 2011

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We review the recently emerged class of hybrid metal-dielectric colloidal photonic crystals. The hybrid approach is understood as the combination of a dielectric photonic crystal with a continuous metal film. It allows to achieve a strong modification of the optical properties of photonic crystals by involving the light scattering at electronic excitations in the metal component into moulding of the light flow in series to the diffraction resonances occurring in the body of the photonic crystal. We consider different realizations of hybrid plasmonic-photonic crystals based on two- and three-dimensional colloidal photonic crystals in association with flat and corrugated metal films. In agreement with model calculations, different resonance phenomena determine the optical response of hybrid crystals leading to a broadly tuneable functionality of these crystals.

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“…The crystals formed with convective assembly show a tendency towards FCC stacking, which has inspired detailed studies of the assembly process [92][93][94][95] . Moreover, the need to prepare perfect defect-free crystals for photonic applications, resulted in the identification of different defect structures and their causes [42,96,97] , and has even led to control over defect incorporation [98][99][100][101][102] . The thickness and uniformity of the colloidal crystals can be controlled by several experimental factors during the convective assembly process.…”

Section: Convective Assemblymentioning

confidence: 99%

“…At ω = 0° the horizontal peak is located at q = 0.0111 nm -1 giving a lattice spacing of 566 nm. From the symmetry the structure can be identified as an FCC-like structure with the [100] projections (Fig. 9.8.a,e) and [110] (Fig 9.8.c) seen over 90° of rotation.…”

Section: Effect Of An External Magnetic Fieldmentioning

confidence: 99%