Fabrication of mesoporous organosilica in a shallow nanotrench for low-k and high elastic modulus material application

Oh, Hyun‐Taek; Kim, Jae Hyun; Jang, Jyongsik

doi:10.1039/c2jm34994a

Cited by 7 publications

(2 citation statements)

References 25 publications

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“…Quantum dots (QDs) are a large family of inorganic nanocrystals with quantum-confined physical properties, which have important advantages including narrow and size-dependent emission spectra, multicolor excitation, and excellent photostability against photobleaching. , The most commonly used QDs are of the cadmium chalcogenide group due to ease of synthesis and handling. , The integration of QDs with different materials will provide a new generation of fluorescence markers for biological assay. As a typical kind of soft material, hydrogels can provide an ideal environment hosting a variety of functional molecules and nanoparticles, including QDs.…”

Section: Introductionmentioning

confidence: 99%

Dual Stimuli-Responsive Supramolecular Hydrogel Based on Hybrid Inclusion Complex (HIC)

et al. 2010

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A novel dual-responsive supramolecular hydrogel composed of an azobenzene (AZO) endfunctionalized block copolymer PDMA-b-PNIPAM (AZO-(PDMA-b-PNIPAM)) and β-cyclodextrin-modified CdS quantum dot (β-CD@QD) has been demonstrated. Based on the host-guest inclusion complexation of AZO of the block copolymers and CD cavities on β-CD@QD, they form a hybrid inclusion complex (HIC). The HIC contains a QD as the core and the block copolymer as the shell with the PNIPAM block as the outer layer. Dynamic light scattering (DLS) and UV-vis spectroscopy investigation proved the HIC structure in diluted solution. Hydrogel formed easily upon heating the aqueous solution of HIC at a concentration as low as 7 wt %; as a result of PNIPAM, aggregation occurred above the LCST. The inclusion complex and the domains of the collapsed PNIPAM chains serve as two distinct cross-links and render the hydrogel excellent dual sensitivity to competitive hosts/guests substitution and to temperature variation. Furthermore, rheology results quantitatively exhibit the hydrogel formation mechanism and the sol-to-gel reversibility following the two external stimuli.

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Section: Introductionmentioning

confidence: 99%

Dual Stimuli-Responsive Supramolecular Hydrogel Based on Hybrid Inclusion Complex (HIC)

et al. 2010

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“…Since MCM-41 was discovered 1 by Scientists in Mobil over two decades ago, ordered mesoporous materials have exhibited a huge potential for applications in many industries, such as catalysis, [2][3][4] adsorption, 5 separation, 6 drug delivery 7,8 and sensors. [9][10][11] Undoubtedly, the structures of mesoporous materials play a prominent role when evaluating their performance. Compared to interpreting the hexagonal mesoporous materials, which manly comprise hexagonally arranged, parallel 12 or twisted channels, 13 understanding cubic mesostructures is more challenging.…”

Section: Introductionmentioning

confidence: 99%

Controlling the window size in mesoporous SBA-16

Qin

Sakamoto

Anderson

2014

Phys. Chem. Chem. Phys.

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The structure of the mesoporous silica SBA-16 has been interrogated by careful elimination of the organic templating agent using ozone treatment. It is shown that the as-synthesised material consists of large cages connected by very narrow, ca. 7 Å, windows. These windows open up to about 20 Å following a calcination treatment that suggests that the functionality of SBA-16 could be changed markedly depending upon the post-synthesis treatment. The structure of SBA-16 is compared with surfaces of constant mean curvature. This illustrates that although most of the structure conforms to a surface of constant mean curvature the necks in the structure near the windows deviate strongly. This confirms that attractive forces in this region during synthesis play an important role in shaping the final structure. Following calcination the structure changes as the silica framework relaxes to a constant surface energy.

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