Observation of molecular self-assembly events in massively parallel microdroplet arrays

Lab on a Chip ◽  
2018 ◽  
Vol 18 (21) ◽  
pp. 3303-3309 ◽  
Author(s):  
Zenon Toprakcioglu ◽  
Pavan Kumar Challa ◽  
Aviad Levin ◽  
Tuomas P. J. Knowles
Keyword(s):  
Microfluidic Device ◽  
Self Assembly ◽  
Single Layer ◽  
Massively Parallel ◽  
Aggregation Processes

Single-layer PDMS-based microfluidic device allowing for the generation of parallel microdroplet arrays for observing stochastic nucleation events and aggregation processes.

scholarly journals Nanostructural self-assembly of iridescent feather barbules through depletion attraction of melanosomes during keratinization

2011 ◽  
Vol 9 (69) ◽  
pp. 734-743 ◽  
Author(s):  
Rafael Maia ◽  
Regina H. F. Macedo ◽  
Matthew D. Shawkey
Keyword(s):  
Self Assembly ◽  
Light And Electron Microscopy ◽  
Single Layer ◽  
Metabolic Cost ◽  
Condition Dependence ◽  
Developmental Pathway ◽  
Ordered Arrays ◽  
Cellular Control ◽  
Ornamental Traits ◽  
Nanostructural Organization

Avian plumage colours are model traits in understanding the evolution of sexually selected ornamental traits. Paradoxically, iridescent structural colours, probably the most dazzling of these traits, remain the most poorly understood. Though some data suggest that expression of bright iridescent plumage colours produced by highly ordered arrays of melanosomes and keratin is condition-dependent, almost nothing is known of their ontogeny and thus of any developmental mechanisms that may be susceptible to perturbation. Here, we use light and electron microscopy to compare the ontogeny of iridescent male and non-iridescent female feathers in blue-black grassquits. Feather barbules of males contain a single layer of melanosomes bounded by a thin layer of keratin-producing blue iridescent colour, while those of females contain disorganized melanosomes and no outer layer. We found that nanostructural organization of male barbules occurs late in development, following death of the barbule cell, and is thus unlikely to be under direct cellular control, contrary to previous suggestions. Rather, organization appears to be caused by entropically driven self-assembly through depletion attraction forces that pin melanosomes to the edge of barbule cells and to one another. These forces are probably stronger in developing barbules of males than of females because their melanosomes are (i) larger, (ii) more densely packed, and (iii) more homogeneously distributed owing to the more consistent shape of barbules during keratinization. These data provide the first proposed developmental pathway for iridescent plumage colours, and suggest that any condition dependence of iridescent barbules is likely driven by factors other than direct metabolic cost.

Self-Assembly Growth and Size Control of Silver Nanocrystals for Nonvolatile Memory Applications

2009 ◽  
Vol 610-613 ◽  
pp. 585-590 ◽  
Author(s):  
Li Wang ◽  
Hong Fang Sun ◽  
Hui Hua Zhou ◽  
Jing Zhu
Keyword(s):  
Self Assembly ◽  
Nonvolatile Memory ◽  
Single Layer ◽  
Size Control ◽  
Transmission Electron ◽  
Sputtering Power ◽  
High Uniformity ◽  
Memory Applications ◽  
Magnetic Sputtering ◽  
The Relationship

A film with a single-layer of size controlled silver nanocrystals embedded in silicon dioxide (SiO2) dielectric film by magnetic sputtering has been fabricated for nonvolatile memory applications. The effects of sputtering power, deposition time and substrate temperature on Ag nanocrystals formation were investigated. Transmission electron microscopy (TEM) images showed the as-prepared Ag nanocrystals had high uniformity in their size and distribution. The relationship between Ag nanocrystal size, density and electron storage capability as well as date retention time has been discussed.

scholarly journals Feedback control for defect-free alignment of colloidal particles

Lab on a Chip ◽  
2018 ◽  
Vol 18 (14) ◽  
pp. 2099-2110 ◽  
Author(s):  
Yu Gao ◽  
Richard Lakerveld
Keyword(s):  
Feedback Control ◽  
Microfluidic Device ◽  
Self Assembly ◽  
Colloidal Particles ◽  
Control Method ◽  
Feedback Control Method

A novel feedback control method to align colloidal particles reliably via directed self-assembly in a microfluidic device is presented.

Nano-bridging: a massively parallel self-assembly technique for interconnecting nanowire sensors

2004 ◽  
Author(s):  
M. Saif Islam ◽  
Shashank Sharma ◽  
Theodore I. Kamins ◽  
R. Stanley Williams
Keyword(s):  
Self Assembly ◽  
Massively Parallel ◽  
Assembly Technique ◽  
Nanowire Sensors

A massively parallel microfluidic device for long-term visualization of isolated motile cells

2014 ◽  
Vol 17 (5) ◽  
pp. 821-829 ◽  
Author(s):  
Shakked O. Halperin ◽  
Chelsey T. Poling ◽  
Shilpi R. Mathrani ◽  
Brendan W. Turner ◽  
Adrienne C. Greene ◽  
...  
Keyword(s):  
Microfluidic Device ◽  
Massively Parallel ◽  
Motile Cells

Self-Assembly of 4-Vinylbenzoic Acid Layer on the Magnetic Nanoparticles and In Situ Polymerization

2011 ◽  
Vol 391-392 ◽  
pp. 1427-1430
Author(s):  
Guo Lun Zhong ◽  
Ru Yi Bi ◽  
Hong Lei Mao ◽  
Yong Hong Wang ◽  
Jin Bao Xu
Keyword(s):  
Self Assembly ◽  
In Situ Polymerization ◽  
Single Layer ◽  
Hydrophobic Surface ◽  
Good Property ◽  
Functional Polymer ◽  
Coated Nanoparticles ◽  
Magnetite Particles ◽  
20 Nm

A new method for fabrication of core-shell functional polymer coated nanoparticles was proposed in this work. At first the magnetite particles were wrapped with single-layer oleic acid for getting a hydrophobic surface. Then the monomer molecules of 4-vinylbenzoic acid were fabricated onto this layer by self-assembly and finally in-situ polymerization was taken place for obtaining the functional polymer coated nanoparticles with –COOH groups outside. The nanoparticles were characterized by FTIR, TEM, magnetic property, etc. The results showed that the size of the particle was less than 20 nm in diameter and had a very good property of superparamagnetism.

Self-assembly surface modified indium tin oxide anodes for single-layer light-emitting diodes

2003 ◽  
Vol 36 (5) ◽  
pp. 434-438 ◽  
Author(s):  
Jorge Morgado ◽  
Nunzio Barbagallo ◽  
Ana Charas ◽  
Manuel Matos ◽  
Lu s Alc cer ◽  
...  
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Self Assembly ◽  
Light Emitting Diodes ◽  
Single Layer ◽  
Light Emitting ◽  
Surface Modified
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