scholarly journals Controlling drug delivery kinetics from mesoporous titania thin films by pore size and surface energy

2015 ◽  
pp. 4425 ◽  
Author(s):  
Johan Karlsson ◽  
Saba Atefyekta ◽  
Martin Andersson
Keyword(s):  
Thin Films ◽  
Drug Delivery ◽  
Surface Energy ◽  
Pore Size ◽  
Mesoporous Titania

scholarly journals Antimicrobial performance of mesoporous titania thin films: role of pore size, hydrophobicity, and antibiotic release

2016 ◽  
pp. 977 ◽  
Author(s):  
Martin Andersson ◽  
Saba Atefyekta ◽  
Batur Ercan ◽  
Johan Karlsson ◽  
Erik Taylor ◽  
...  
Keyword(s):  
Thin Films ◽  
Pore Size ◽  
Mesoporous Titania ◽  
Antimicrobial Performance ◽  
Antibiotic Release

Thermal Conductivity of Highly Ordered Amorphous and Crystalline Mesoporous Titania Thin Films

2010 ◽  
Author(s):  
Thomas Coquil ◽  
Laurent Pilon ◽  
Christian Reitz ◽  
Torsten Brezesinski ◽  
Joseph E. Nemanick ◽  
...  
Keyword(s):  
Thin Films ◽  
Thermal Conductivity ◽  
Film Thickness ◽  
Pore Size ◽  
Wall Thickness ◽  
Sol Gel ◽  
Atomic Scale ◽  
Mesoporous Titania ◽  
Titania Films ◽  
The Cross

This paper reports the cross-plane thermal conductivity of amorphous and crystalline templated mesoporous titania thin films synthesized by evaporation-induced self-assembly. Both sol-gel and nanocrystal-based films were considered, with respective average porosities of 30% and 35%. The pore diameter ranged from 7 to 25 nm and film thickness from 60 to 370 nm while the average wall thickness varied from 3 to 25 nm. Nanocrystals in crystalline mesoporous films featured diameters between 9 and 13 nm. The thermal conductivity was measured at room temperature using the 3ω method. The experimental setup and the associated analysis were validated by comparing the thermal conductivity measurements with data reported in the literature for dense titania films with thickness ranging from 95 to 1000 nm. The cross-plane thermal conductivity of the amorphous mesoporous titania thin films did not show strong dependence on pore size, wall thickness, or film thickness. This can be attributed to the high atomic scale disorder of amorphous materials. Heat is thus mainly carried by localized non-propagating vibrational modes. The average thermal conductivity of the amorphous mesoporous titania films was identical to that of the nanocrystal-based films and equal to 0.37 W/m.K. Thermal conductivity of sol-gel crystalline mesoporous titania thin films was significantly larger than that of their amorphous counterparts. It also depended on the organic template used to make the films. The results indicated that the pore size was not an important factor. Instead thermal conductivity depended only on porosity, crystallinity, nanocrystal size and connectivity.

scholarly journals Biocompatible, surface functionalized mesoporous titania nanoparticles for intracellular imaging and anticancer drug delivery

2011 ◽  
Vol 47 (18) ◽  
pp. 5232 ◽  
Author(s):  
Kevin C.-W. Wu ◽  
Yusuke Yamauchi ◽  
Chen-Yu Hong ◽  
Ya-Huei Yang ◽  
Yung-He Liang ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Anticancer Drug ◽  
Titania Nanoparticles ◽  
Mesoporous Titania ◽  
Intracellular Imaging ◽  
Anticancer Drug Delivery

A New X-Ray Scattering Method for Determining Pore-Size Distribution in Low-k Thin Films

2001 ◽  
Vol 714 ◽  
Author(s):  
Kazuhiko Omote ◽  
Shigeru Kawamura
Keyword(s):  
Thin Films ◽  
Pore Size Distribution ◽  
Pore Size ◽  
Gas Adsorption ◽  
Size Distributions ◽  
X Ray ◽  
X Ray Scattering ◽  
Pore Size Distributions ◽  
Scattering Technique ◽  
Ray Scattering

ABSTRACTWe have successively developed a new x-ray scattering technique for a non-destructive determination of pore-size distributions in porous low-κ thin films formed on thick substrates. The pore size distribution in a film is derived from x-ray diffuse scattering data, which are measured using offset θ/2θ scans to avoid strong specular reflections from the film surface and its substrate. Γ-distribution mode for the pores in the film is used in the calculation. The average diameter and the dispersion parameter of the Γ-distribution function are varied and refined by computer so that the calculated scattering pattern best matches to the experimental pattern. The technique has been used to analyze porous methyl silsesquioxane (MSQ) films. The pore size distributions determined by the x-ray scattering technique agree with that of the commonly used gas adsorption technique. The x-ray technique has been also used successfully determine small pores less than one nanometer in diameter, which is well below the lowest limit of the gas adsorption technique.

scholarly journals Identification of new silk-like protein from B. magister and development of functional materials based on it

2021 ◽  
Vol 2086 (1) ◽  
pp. 012123
Author(s):  
A A Vronskaia ◽  
A D Mikushina ◽  
I E Eliseev
Keyword(s):  
Thin Films ◽  
Drug Delivery ◽  
Tandem Repeat ◽  
Composite Structure ◽  
Textile Industry ◽  
Functional Materials ◽  
Repeat Proteins ◽  
Tandem Repeat Proteins ◽  
New Protein

Abstract Tandem repeat proteins have composite structure and unique properties, which allow them to be used in multiple fields, such as soft photonics, drug delivery and textile industry. The recent discovery of squid ring teeth (SRT) proteins have expanded the existing repertoire of repetitive polypeptides. We chose previously unexplored squid B. magister for our research, isolated and analyzed a new protein forming its ring teeth and hooks, and amplified the corresponding gene. Finally, we used this new isolated SRT protein to fabricate transparent thin films and microspheres.

Rational design of hollow mesoporous titania nanoparticles loaded with curcumin for UV-controlled release and targeted drug delivery

2021 ◽  
Vol 32 (20) ◽  
pp. 205604
Author(s):  
Zhuoxian Mai ◽  
Jiali Chen ◽  
Qingyun Cao ◽  
Yang Hu ◽  
Xianming Dong ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Controlled Release ◽  
Targeted Drug Delivery ◽  
Rational Design ◽  
Titania Nanoparticles ◽  
Mesoporous Titania ◽  
Targeted Drug

Synthesis of mesoporous carbon with tunable pore size for supercapacitors

2020 ◽  
Vol 44 (3) ◽  
pp. 1036-1044 ◽  
Author(s):  
Beibei Liu ◽  
Lei Liu ◽  
Yifeng Yu ◽  
Yue Zhang ◽  
Aibing Chen
Keyword(s):  
Drug Delivery ◽  
Energy Storage ◽  
Pore Size ◽  
Mesoporous Carbon ◽  
Absorption Energy

Mesoporous carbon (MC) has wide applications, including in drug delivery, catalysis, absorption, energy storage/conversion, etc.

scholarly journals Minimizing Drying Shrinkage and Enhancing Impermeability of Foam Concrete Modified with Epoxy Resin

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Jianqing Gong ◽  
Ke Li
Keyword(s):  
Surface Energy ◽  
Pore Size ◽  
Epoxy Resin ◽  
Average Pore Size ◽  
Drying Shrinkage ◽  
Maximum Level ◽  
High Porosity ◽  
Foam Concrete ◽  
Average Pore ◽  
Internal Pore Structure

Relatively high drying shrinkage and permeability were two of the major challenges associated with foam concrete (FC), primarily due to its high porosity nature. This study was aimed at reducing the drying shrinkage and improving the impermeability of FC by blending and modifying it with epoxy resin (EP). Extensive laboratory testing yielded an optimum content of 4.0% EP, corresponding to a minimum drying shrinkage rate of 1.47 mm/m, which was 48% lower than that of the unmodified FC. At this optimum dosage of 4.0% EP, the permeability pressure was at a maximum level of 1.4 MPa, whereas the permeability coefficient was at its lowest value of 0.75 × 10−9  mm/h. Internal pore structure and EP distribution were characterized using the scanning electron microscopy and indicated that a microgrid structure of the FC was formed internally, featuring an increase in the number of pores, a reduction in the average pore size, and a uniform pore size distribution. Similarly, surface energy measurements using the tensiometry method yielded maximum surface energy values at 4.0% EP content, which could be used to explain the reduced drying shrinkage and the enhanced impermeability characteristics of the modified FC.

scholarly journals Potential of biocompatible polymeric ultra-thin films, nanosheets, as topical and transdermal drug delivery devices

2019 ◽  
Vol 565 ◽  
pp. 41-49 ◽  
Author(s):  
Tomomi Hatanaka ◽  
Takanori Saito ◽  
Takaaki Fukushima ◽  
Hiroaki Todo ◽  
Kenji Sugibayashi ◽  
...  
Keyword(s):  
Thin Films ◽  
Drug Delivery ◽  
Transdermal Drug Delivery ◽  
Drug Delivery Devices

scholarly journals Fractionation of block copolymers for pore size control and reduced dispersity in mesoporous inorganic thin films

Nanoscale ◽  
2020 ◽  
Vol 12 (35) ◽  
pp. 18455-18462
Author(s):  
Alberto Alvarez-Fernandez ◽  
Barry Reid ◽  
Jugal Suthar ◽  
Swan Yia Choy ◽  
Maximiliano Jara Fornerod ◽  
...  
Keyword(s):  
Thin Films ◽  
Block Copolymers ◽  
Pore Size ◽  
Size Control ◽  
Widespread Application ◽  
Inorganic Thin Films ◽  
Pore Size Control

Inorganic mesoporous coatings find widespread application. In many cases, control over the pore dimensions is of paramount importance. To this end, we establish a powerful route to pore size and dispersity control.

Sign in / Sign up

Export Citation Format

Share Document