Template-Assisted Growth of Nominally Cubic (100)-Oriented Three-Dimensional Crack-Free Photonic Crystals

Jin, Changjie; McLachlan, Martyn A.; McComb, David W.; Rue, R.M. De La; Johnson, Nigel P.

doi:10.1021/nl051905j

Cited by 81 publications

(80 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, [100]-oriented crystalline coatings were achieved by using a volume particle concentration of 30 % in ethanol and speeds between 25-200 rps. This is particularly interesting from a practical point of view since this has been only achieved before by forcing the colloidal crystal to grow in that direction [14][15][16][17] using surface relief patterns, which are usually costly and take a long time to prepare. In Figure 2a-d, we show some SEM images of both the surface and the cross section of a [100]-oriented crystal grown by spin-coating a colloidal silica sphere suspension on a glass substrate.…”

mentioning

confidence: 99%

Oriented Colloidal‐Crystal Thin Films by Spin‐Coating Microspheres Dispersed in Volatile Media

2006

View full text Add to dashboard Cite

A simple, reproducible, and reliable method to crystallize sub‐micrometer‐size spherical colloids using a mixture of volatile solvents as dispersion media is presented. Strongly diffracting direct opal structures of high uniformity are attainable over large areas within minutes and without further processing. Thickness and orientation control is also possible through this technique. In the figure, both [111] (left) and [100] (right) oriented lattices deposited on glass slides are shown.

show abstract

mentioning

confidence: 99%

Oriented Colloidal‐Crystal Thin Films by Spin‐Coating Microspheres Dispersed in Volatile Media

2006

View full text Add to dashboard Cite

show abstract

“…Slightly tapered nanopillar arrays have been employed as the templates, since colloidal nanospheres can be deposited in the vacancies between adjacent nanopillars [54,55]. Cui et al delineated a practicable approach for the hierarchical assembly of isotropic and anisotropic colloidal nanostructures over large areas; this approach represents a significant step toward the integration of metallic colloids [See Fig.…”

Section: Plasmonic Gaps Created By Self-assemblymentioning

confidence: 99%

Survey of plasmonic gaps tuned at sub-nanometer scale in self-assembled arrays

Qian

Wang

et al. 2016

Front. Phys.

View full text Add to dashboard Cite

Creating nanoscale and sub-nanometer gaps between noble metal nanoparticles is critical for the applications of plasmonics and nanophotonics. To realize simultaneous attainments of both the optical spectrum and the gap size, the ability to tune these nanoscale gaps at the sub-nanometer scale is particularly desirable. Many nanofabrication methodologies, including electron beam lithography, self-assembly, and focused ion beams, have been tested for creating nanoscale gaps that can deliver significant field enhancement. Here, we survey recent progress in both the reliable creation of nanoscale gaps in nanoparticle arrays using self-assemblies and in the in-situ tuning techniques at the sub-nanometer scale. Precisely tunable gaps, as we expect, will be good candidates for future investigations of surface-enhanced Raman scattering, non-linear optics, and quantum plasmonics. Overview of plasmonicsLight-metal interactions were well exploited in a number of ancient artworks that are now on display around the world. One of the most common examples is the colorful window glass found in many ancient European churches, where the colors actually are a result of the scattering of metallic nanoparticles (NPs) [1]. Another even more famous example is the Lycurgus cup, which shows a strikingly red color when viewed in transmitted light, but turns green in reflected light, as shown in Fig. 1 section of scattering as illustrated in Fig. 1 counterparts [16,17]. Therefore, plasmonics holds great promise for penetration into chemical and biological sensors at tiny volumes, even more so than optoelectronic nanodevices were initially anticipated to accomplish [18,19]. Plasmonic gaps created by self-assemblyDue to strong near-field coupling, the intense electromagnetic field within the plasmonic gaps stimulates continuous development in several disciplines. The first method involves random aggregations triggered by some extraneous chemicals, including molecules, DNA, and ions, which can interrupt the surface charging onto metal NPs. When the suitable molecules or ions are added to the metallic colloids, a color change is visible to the naked eye [34][35][36][37]. Partial aggregations of gold colloids give rise to some plasmonic gaps, inducing the output of the SERS with extraordinarily large enhancements [38,39]. When plasmonic NPs are assembled at the two immiscible phases and even aggregated into volume colloids [40], the spatial distribution of the NPs can be tailored by changing their chemical environments [41,42]. A stepwise strategy to generate regular heterogeneous binary NP arrays has also been reported in the literature [43]. Nowadays, based on this principle of random aggregation, gold colloids have become commercially available in products used as biological detectors, such as oviposit and pregnancy test strips.In the second method, similar to the formation of a "coffee ring", a two-dimensional NP array can be achieved by self-assembly on a liquid/air interface [44]. The NP within the colloid will flow towards the contact ...

show abstract

“…[14] While this may be another viable mechanism for stacking fault formation, we note that the stacking changes we report here occur within films of constant thickness, and therefore our experiments have been isolated from such disturbances. We reiterate that stacking fault formation has been shown to be avoidable both by depositing spheres on a patterned template that directs colloidal self-assembly in the h100i direction, [46] which is due to the fact that a closepacked crystal having square symmetry is unique to a defectfree fcc crystal system, [47] and through the use of shear-alignment cells. [17] Presumably, the absence of impurities would still be a requirement to obtain a perfectly templated structure over areas larger than those reported in both cases.…”

mentioning

confidence: 94%

Visualization of Stacking Faults and their Formation in Colloidal Photonic Crystal Films

et al. 2008

View full text Add to dashboard Cite

We demonstrate experimentally that stacking faults give rise to unique optical spectra in self‐assembled colloidal crystal films. These defects are shown to affect only bands in the high frequency region, while leaving the fundamental 〈111〉 stopgap unaffected. Stacking faults are revealed to be caused by the incorporation of impurity spheres into the colloidal lattice during growth (pictured), a mechanism common to atomic crystallization.

show abstract

Template-Assisted Growth of Nominally Cubic (100)-Oriented Three-Dimensional Crack-Free Photonic Crystals

Cited by 81 publications

References 38 publications

Oriented Colloidal‐Crystal Thin Films by Spin‐Coating Microspheres Dispersed in Volatile Media

Oriented Colloidal‐Crystal Thin Films by Spin‐Coating Microspheres Dispersed in Volatile Media

Survey of plasmonic gaps tuned at sub-nanometer scale in self-assembled arrays

Visualization of Stacking Faults and their Formation in Colloidal Photonic Crystal Films

Contact Info

Product

Resources

About