| 1. |
- Gebauer, Denis, et al.
(författare)
-
A transparent hybrid of nanocrystalline cellulose and amorphous calcium carbonate nanoparticles
- 2011
-
Ingår i: NANOSCALE. - : Royal Society of Chemistry (RSC). - 2040-3364 .- 2040-3372. ; 3:9, s. 3563-3566
-
Tidskriftsartikel (refereegranskat)abstract
- Nanocellulose hybrids are promising candidates for biodegradable multifunctional materials. Hybrids of nanocrystalline cellulose (NCC) and amorphous calcium carbonate (ACC) nanoparticles were obtained through a facile chemical approach over a wide range of compositions. Controlling the interactions between NCC and ACC results in hard, transparent structures with tunable composition, homogeneity and anisotropy.
|
|
| 2. |
- Lavrenyuk, Yaroslav, et al.
(författare)
-
Faithful group actions on rooted trees induced by actions of quotients
- 2007
-
Ingår i: Communications in Algebra. - : Informa UK Limited. - 0092-7872 .- 1532-4125. ; 35:11, s. 3759-3775
-
Tidskriftsartikel (refereegranskat)abstract
- We develop some new techniques of constructing (finite state) actions on rooted homogeneous trees and apply them to various groups. In particular we show that there is a faithful action of each amalgameted free product of the form Z * (Z) Z on a rooted homogeneous tree of finite degree, described by finite state automorphisms.
|
|
| 3. |
|
|
| 4. |
- Oliynyk, Vitaliy, et al.
(författare)
-
Selective and ATP-driven transport of ions across supported membranes into nanoporous carriers using gramicidin A and ATP synthase
- 2013
-
Ingår i: Physical Chemistry, Chemical Physics - PCCP. - : Royal Society of Chemistry (RSC). - 1463-9076 .- 1463-9084. ; 15:8, s. 2733-2740
-
Tidskriftsartikel (refereegranskat)abstract
- We report a robust and versatile membrane protein based system for selective uptake and release of ions from nanoporous particles sealed with ion-tight lipid bilayers of various compositions that is driven by the addition of ATP or a chemical potential gradient. We have successfully incorporated both a passive ion channel-type peptide (gramicidin A) and a more complex primary sodium ion transporter (ATP synthase) into the supported lipid bilayers on solid nanoporous silica particles. Protein-mediated controlled release/uptake of sodium ions across the ion-tight lipid bilayer seal from or into the nanoporous silica carrier was imaged in real time using a confocal laser scanning microscope and the intensity changes were quantified. ATP-driven transport of sodium ions across the supported lipid bilayer against a chemical gradient was demonstrated. The possibility of designing durable carriers with tight lipid membranes, containing membrane proteins for selective ion uptake and release, offers new possibilities for functional studies of single or cascading membrane protein systems and could also be used as biomimetic microreactors for controlled synthesis of inorganic multicomponent materials.
|
|
| 5. |
|
|
| 6. |
- Schütz, Christina, et al.
(författare)
-
Hard and Transparent Films Formed by Nanocellulose-TiO2 Nanoparticle Hybrids
- 2012
-
Ingår i: PLOS ONE. - : Public Library of Science (PLoS). - 1932-6203. ; 7:10, s. e45828-
-
Tidskriftsartikel (refereegranskat)abstract
- The formation of hybrids of nanofibrillated cellulose and titania nanoparticles in aqueous media has been studied. Their transparency and mechanical behavior have been assessed by spectrophotometry and nanoindentation. The results show that limiting the titania nanoparticle concentration below 16 vol% yields homogeneous hybrids with a very high Young's modulus and hardness, of up to 44 GPa and 3.4 GPa, respectively, and an optical transmittance above 80%. Electron microscopy shows that higher nanoparticle contents result in agglomeration and an inhomogeneous hybrid nanostructure with a concomitant reduction of hardness and optical transmittance. Infrared spectroscopy suggests that the nanostructure of the hybrids is controlled by electrostatic adsorption of the titania nanoparticles on the negatively charged nanocellulose surfaces.
|
|
