scholarly journals Controlled self-assembly of stomatosomes by use of single-component fluorinated dendritic amphiphiles

Soft Matter ◽  
2018 ◽  
Vol 14 (25) ◽  
pp. 5256-5269 ◽  
Author(s):  
H. v. Berlepsch ◽  
B. N. S. Thota ◽  
M. Wyszogrodzka ◽  
S. de Carlo ◽  
R. Haag ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Self Assembly ◽  
Single Component ◽  
Alkyl Chains ◽  
Flexible Spacer ◽  
Head Groups ◽  
Transmission Electron

A series of novel non-ionic amphiphiles with dendritic oligoglycerol head groups and lipophilic/fluorophilic tail segments, comprising single or double tail alkyl chains, C8F17-perfluoro rod segments as well as flexible spacer groups were designed and their supramolecular behavior characterised by cryo-transmission electron microscopy and tomography.

scholarly journals Alpha helical surfactant-like peptides self-assemble into pH-dependent nanostructures

Soft Matter ◽  
2021 ◽  
Vol 17 (11) ◽  
pp. 3096-3104
Author(s):  
Valeria Castelletto ◽  
Jani Seitsonen ◽  
Janne Ruokolainen ◽  
Ian W. Hamley
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Small Angle ◽  
Self Assembly ◽  
X Ray ◽  
Cryogenic Transmission Electron Microscopy ◽  
X Ray Scattering ◽  
Transmission Electron ◽  
Ph Dependent ◽  
Ray Scattering

A designed surfactant-like peptide is shown, using a combination of cryogenic-transmission electron microscopy and small-angle X-ray scattering, to have remarkable pH-dependent self-assembly properties.

scholarly journals Zig-zag Self-assembly of Magnetic Octahedral Fe3O4 Nanocrystals using in situ Liquid Transmission Electron Microscopy

2016 ◽  
Vol 22 (S5) ◽  
pp. 36-37
Author(s):  
Arnaud Demortiere ◽  
Charudatta Phatak ◽  
Andras Kovacs ◽  
Jan Caron ◽  
Nikita Repnin ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Self Assembly ◽  
Transmission Electron

Cryogenic Transmission Electron Microscopy: Aqueous Suspensions of Nanoscale Objects

2013 ◽  
Vol 19 (6) ◽  
pp. 1542-1553 ◽  
Author(s):  
Nathan D. Burrows ◽  
R. Lee Penn
Keyword(s):  
Thin Film ◽  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Sample Preparation ◽  
Self Assembly ◽  
Aqueous Samples ◽  
Liquid Media ◽  
Cryogenic Transmission Electron Microscopy ◽  
Transmission Electron ◽  
The Many

AbstractDirect imaging of nanoscale objects suspended in liquid media can be accomplished using cryogenic transmission electron microscopy (cryo-TEM). Cryo-TEM has been used with particular success in microbiology and other biological fields. Samples are prepared by plunging a thin film of sample into an appropriate cryogen, which essentially produces a snapshot of the suspended objects in their liquid medium. With successful sample preparation, cryo-TEM images can facilitate elucidation of aggregation and self-assembly, as well as provide detailed information about cells and viruses. This work provides an explanation of sample preparation, detailed examples of the many artifacts found in cryo-TEM of aqueous samples, and other key considerations for successful cryo-TEM imaging.

scholarly journals Cryogenic Transmission Electron Microscopy Study of Amelogenin Self-Assembly at Different pH

2011 ◽  
Vol 194 (2-4) ◽  
pp. 166-170 ◽  
Author(s):  
Ping-An Fang ◽  
Henry C. Margolis ◽  
James F. Conway ◽  
James P. Simmer ◽  
Gary H. Dickinson ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Self Assembly ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Transmission Electron Microscopy Study ◽  
Cryogenic Transmission Electron Microscopy ◽  
Transmission Electron

Preparation of vermiculites for HRTEM

Clay Minerals ◽  
1989 ◽  
Vol 24 (1) ◽  
pp. 23-32 ◽  
Author(s):  
CH. Marcks ◽  
H. Wachsmuth ◽  
H. Graf V. Reichenbach
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Computer Simulation ◽  
High Resolution ◽  
Alkyl Chains ◽  
Transmission Electron ◽  
Lattice Images ◽  
Silicate Layers

AbstractA technique for preparing vermiculites for examination by high-resolution transmission electron microscopy (HRTEM) has been developed. A TEM-stable expanded phase can be obtained by intercalating n-alkylammonium ions between the silicate layers of a parent biotite. The vermiculite particles were embedded in Spurr resin and centrifuged to improve orientation. Ultra-thin specimens were prepared using an ultramicrotome, the quality and thickness of the sections being monitored by TEM. Lattice images of biotite, Ba-vermiculite and octylammonium-vermiculite, the latter showing a perpendicular arrangement of the alkyl chains relative to the silicate layers, were obtained with a resolution ∼2 Å. The reliability of these images was confirmed by computer simulation.

scholarly journals Self-Assembly Properties of Amphiphilic Iron(III) Spin Crossover Complexes in Water and at the Air–Water Interface

2018 ◽  
Vol 4 (4) ◽  
pp. 49 ◽  
Author(s):  
Paulo N. Martinho ◽  
Irina A. Kühne ◽  
Brendan Gildea ◽  
George McKerr ◽  
Barry O’Hagan ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Self Assembly ◽  
Spin Crossover ◽  
Water Soluble ◽  
Water Interface ◽  
Nanoparticle Formation ◽  
Alkyl Chains ◽  
Transmission Electron ◽  
Air Water Interface ◽  
Magnetic Profile

The assembly properties of three known spin crossover iron(III) complexes 1–3, at the air–water interface, are reported. All three complexes are amphiphiles, each bearing a pair of Cn alkyl chains on the polyamino Schiff base sal2trien ligand (n = 6, 12, or 18). Complex 1 is water-soluble but complexes 2 and 3 form Langmuir films, and attempts were made to transfer the film of the C18 complex 3 to a glass surface. The nature of the assembly of more concentrated solutions of 3 in water was investigated by light scattering, cryo-SEM (scanning electron microscopy), and TEM (transmission electron microscopy), all of which indicated nanoparticle formation. Lyophilization of the assembly of complex 3 in water yielded a powder with a markedly different magnetic profile from the powder recovered from the initial synthesis, notably, the spin crossover was almost completely quenched, and the thermal behavior was predominantly low spin, suggesting that nanoparticle formation traps the system in one spin state.

scholarly journals Studying Polymer Self-Assembly by Combined Cryogenic and Liquid Phase Transmission Electron Microscopy

2016 ◽  
Vol 22 (S5) ◽  
pp. 14-15 ◽  
Author(s):  
Joseph P. Patterson ◽  
Alessandro Ianiro ◽  
Mark van Rijt ◽  
Remco Tuinier ◽  
Catarina Esteves ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Liquid Phase ◽  
Self Assembly ◽  
Transmission Electron ◽  
Phase Transmission
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