Self-assembly of magnetic colloids with radially shifted dipoles

Soft Matter ◽  
2020 ◽  
Vol 16 (10) ◽  
pp. 2460-2472
Author(s):  
Jonathan A. Victoria-Camacho ◽  
Ronal A. DeLaCruz-Araujo ◽  
Ilona Kretzschmar ◽  
Ubaldo M. Córdova-Figueroa
Keyword(s):  
Self Assembly ◽  
Magnetic Colloids ◽  
Dipolar Shift

The effect of dipolar shift on the rate of aggregation (tz), the aggregation modes and structure of clusters is studied.

Self-assembly of magnetic colloids with shifted dipoles

Soft Matter ◽  
2019 ◽  
Vol 15 (20) ◽  
pp. 4078-4086 ◽  
Author(s):  
Gabriel I. Vega-Bellido ◽  
Ronal A. DeLaCruz-Araujo ◽  
Ilona Kretzschmar ◽  
Ubaldo M. Córdova-Figueroa
Keyword(s):  
Self Assembly ◽  
Aggregation Process ◽  
Magnetic Colloids ◽  
Dipolar Shift

The effect of dipolar shift on the size, morphology, and aggregation process of clusters is studied.

scholarly journals Static and Dynamic Self‐Assembly of Pearl‐Like‐Chains of Magnetic Colloids Confined at Fluid Interfaces

Small ◽  
2021 ◽  
pp. 2101188
Author(s):  
Fernando Martínez‐Pedrero ◽  
Andrés González‐Banciella ◽  
Alba Camino ◽  
Ana Mateos‐Maroto ◽  
Francisco Ortega ◽  
...  
Keyword(s):  
Self Assembly ◽  
Fluid Interfaces ◽  
Magnetic Colloids

Biosensing Based on Magnetically Induced Self-Assembly of Particles in Magnetic Colloids

2012 ◽  
Vol 12 (3) ◽  
pp. 2081-2088 ◽  
Author(s):  
Ye Yang ◽  
Yoshitaka Morimoto ◽  
Tsukasa Takamura ◽  
Adarsh Sandhu
Keyword(s):  
Self Assembly ◽  
Magnetic Colloids

scholarly journals Reconfiguring confined magnetic colloids with tunable fluid transport behavior

2020 ◽  
Author(s):  
Zhizhi Sheng ◽  
Mengchuang Zhang ◽  
Jing Liu ◽  
Paolo Malgaretti ◽  
Jianyu Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Drug Delivery ◽  
Self Assembly ◽  
Fluid Transport ◽  
Materials Science ◽  
Colloidal Suspension ◽  
Fine Tuning ◽  
Collective Dynamics ◽  
Theoretical Investigations ◽  
Magnetic Colloids

Abstract Collective dynamics of confined colloids is crucial in diverse scenarios such as self-assembly and phase behavior in materials science, microrobot swarms for drug delivery, and microfluidic control. Yet, fine-tuning the dynamics of colloids in microscale confined spaces is still a formidable task due to the complexity of the dynamics of colloidal suspension and to the lack of methodology to probe colloids in confinement. Here, we show that the collective dynamics of confined magnetic colloids can be finely tuned by external magnetic fields. In particular, the mechanical properties of the confined colloidal suspension can be probed in real-time and this strategy can be also used to tune microscale fluid transport. Our experimental and theoretical investigations reveal that the collective configuration characterized by the colloidal entropy is controlled by the colloidal concentration, confining ratio, and external field strength and direction. Indeed, our results show that mechanical properties of the colloidal suspension as well as the transport of the solvent in microfluidic devices can be controlled upon tuning the entropy of the colloidal suspension. Our approach opens new avenues for the design and applications of drug delivery, microfluidic logic, dynamic fluid control, chemical reaction, and beyond.

scholarly journals Self-assembly of polymer-like structures of magnetic colloids: Langevin dynamics study of basic topologies

2017 ◽  
Vol 44 (6) ◽  
pp. 507-515 ◽  
Author(s):  
D. A. Rozhkov ◽  
E. S. Pyanzina ◽  
E. V. Novak ◽  
J. J. Cerdà ◽  
T. Sintes ◽  
...  
Keyword(s):  
Self Assembly ◽  
Langevin Dynamics ◽  
Magnetic Colloids

scholarly journals Superparamagnetic Colloids: Static and Dynamic Self‐Assembly of Pearl‐Like‐Chains of Magnetic Colloids Confined at Fluid Interfaces (Small 25/2021)

Small ◽  
2021 ◽  
Vol 17 (25) ◽  
pp. 2170127
Author(s):  
Fernando Martínez‐Pedrero ◽  
Andrés González‐Banciella ◽  
Alba Camino ◽  
Ana Mateos‐Maroto ◽  
Francisco Ortega ◽  
...  
Keyword(s):  
Self Assembly ◽  
Fluid Interfaces ◽  
Magnetic Colloids

In vitro and in vivo polysaccharides assembly: ultrastructural and cytochemical study of growing plant cell wall components.

1978 ◽  
Vol 36 (2) ◽  
pp. 434-435
Author(s):  
D. Reis ◽  
B. Vian ◽  
J. C. Roland
Keyword(s):  
Cell Wall ◽  
Self Assembly ◽  
Plant Cell Wall ◽  
Higher Plants ◽  
Three Dimensional ◽  
Cytochemical Study ◽  
Wall Components

Wall morphogenesis in higher plants is a problem still open to controversy. Until now the possibility of a transmembrane control and the involvement of microtubules were mostly envisaged. Self-assembly processes have been observed in the case of walls of Chlamydomonas and bacteria. Spontaneous gelling interactions between xanthan and galactomannan from Ceratonia have been analyzed very recently. The present work provides indications that some processes of spontaneous aggregation could occur in higher plants during the formation and expansion of cell wall.Observations were performed on hypocotyl of mung bean (Phaseolus aureus) for which growth characteristics and wall composition have been previously defined.In situ, the walls of actively growing cells (primary walls) show an ordered three-dimensional organization (fig. 1). The wall is typically polylamellate with multifibrillar layers alternately transverse and longitudinal. Between these layers intermediate strata exist in which the orientation of microfibrils progressively rotates. Thus a progressive change in the morphogenetic activity occurs.

The Nature of Rapidly Extracted Phycocyanin from the Blue-Green Alga Plectonema Boryanum

1971 ◽  
Vol 29 ◽  
pp. 366-367
Author(s):  
M. Kessel ◽  
R. MacColl
Keyword(s):  
Self Assembly ◽  
Analytical Ultracentrifugation ◽  
Uranyl Acetate ◽  
The Self ◽  
Major Protein ◽  
Subunit Structure ◽  
Blue Green Alga ◽  
Thin Sections ◽  
Blue Green Algae ◽  
Cacodylate Buffer

The major protein of the blue-green algae is the biliprotein, C-phycocyanin (Amax = 620 nm), which is presumed to exist in the cell in the form of distinct aggregates called phycobilisomes. The self-assembly of C-phycocyanin from monomer to hexamer has been extensively studied, but the proposed next step in the assembly of a phycobilisome, the formation of 19s subunits, is completely unknown. We have used electron microscopy and analytical ultracentrifugation in combination with a method for rapid and gentle extraction of phycocyanin to study its subunit structure and assembly.To establish the existence of phycobilisomes, cells of P. boryanum in the log phase of growth, growing at a light intensity of 200 foot candles, were fixed in 2% glutaraldehyde in 0.1M cacodylate buffer, pH 7.0, for 3 hours at 4°C. The cells were post-fixed in 1% OsO4 in the same buffer overnight. Material was stained for 1 hour in uranyl acetate (1%), dehydrated and embedded in araldite and examined in thin sections.

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