Vertical Arrays of Anisotropic Particles by Gravity-Driven Self-Assembly

Small ◽  
2011 ◽  
Vol 7 (6) ◽  
pp. 781-787 ◽  
Author(s):  
Benjamin D. Smith ◽  
David J. Kirby ◽  
Christine D. Keating
Keyword(s):  
Self Assembly ◽  
Anisotropic Particles ◽  
Vertical Arrays ◽  
Gravity Driven

scholarly journals Nanoscale Vertical Arrays of Gold Nanorods by Self-Assembly: Physical Mechanism and Application

2019 ◽  
Vol 14 (1) ◽  
Author(s):  
Jun Dong ◽  
Xing Zhao ◽  
Wei Gao ◽  
Qingyan Han ◽  
Jianxia Qi ◽  
...  
Keyword(s):  
Gold Nanorods ◽  
Self Assembly ◽  
Physical Mechanism ◽  
Vertical Arrays

scholarly journals Robust Synthesis of Gold Nanotriangles and their Self‐Assembly into Vertical Arrays

ChemistryOpen ◽  
2019 ◽  
Vol 8 (6) ◽  
pp. 705-711 ◽  
Author(s):  
Piotr Szustakiewicz ◽  
Guillermo González‐Rubio ◽  
Leonardo Scarabelli ◽  
Wiktor Lewandowski
Keyword(s):  
Self Assembly ◽  
Vertical Arrays ◽  
Gold Nanotriangles ◽  
Robust Synthesis

Self-Assembly of Segmented Anisotropic Particles: Tuning Compositional Anisotropy To Form Vertical or Horizontal Arrays

ACS Nano ◽  
2012 ◽  
Vol 7 (1) ◽  
pp. 825-833 ◽  
Author(s):  
Benjamin D. Smith ◽  
David J. Kirby ◽  
Isamar Ortiz Rivera ◽  
Christine D. Keating
Keyword(s):  
Self Assembly ◽  
Anisotropic Particles

THE ASSEMBLY OF CHAIN-LIKE Ni ARRAYS UNDER MAGNETIC FIELD AND ITS ENHANCED PROPERTIES

2010 ◽  
Vol 09 (05) ◽  
pp. 543-547 ◽  
Author(s):  
JUN WANG ◽  
SHIHE CAO ◽  
SIHUA XIA ◽  
NING GAN
Keyword(s):  
Magnetic Field ◽  
Electron Microscope ◽  
External Magnetic Field ◽  
Self Assembly ◽  
Hydrothermal Process ◽  
X Ray Diffraction ◽  
Vertical Arrays ◽  
Transmission Electron ◽  
Xrd Patterns ◽  
Facile Hydrothermal Process

Chain-like nickel arrays assembled from magnetic Ni spheres were successfully prepared through a facile hydrothermal process at 200°C under a 0.25 T external magnetic field. The external magnetic field is strongly believed to be the driving force of the self-assembly. The sample was highly crystalline as confirmed by the X-ray diffraction (XRD) patterns. The scanning electron microscope (SEM) and transmission electron microscope (TEM) images show that all Ni spheres are closely interconnected to form chains, with ~ 950 nm in diameter and ~ 1 cm in length, which arrange into vertical arrays on the silicon substrate. The coercivity and remnant magnetization ratio of the sample, 670 Oe and 0.612, respectively, are substantially higher than for the sample prepared without an applied external magnetic field (68 Oe and 0.336). Such enhancements can be attributed to their novel superstructure, shape anisotropy, reduced demagnetization factor, etc. This process can be used to fabricate large arrays of uniform chains of magnetic materials and modulate their magnetic properties.

Self-assembly of anisotropic particles

Soft Matter ◽  
2011 ◽  
Vol 7 (7) ◽  
pp. 3553 ◽  
Author(s):  
Szilard N. Fejer ◽  
Dwaipayan Chakrabarti ◽  
David J. Wales
Keyword(s):  
Self Assembly ◽  
Anisotropic Particles

Electrochemical Synthesis of Multi-Material Nanowires as Building Blocks for Functional Nanostructures

2000 ◽  
Vol 636 ◽  
Author(s):  
David J. Pena ◽  
Baharak Razavi ◽  
Peter A. Smith ◽  
Jeremiah K. Mbindyo ◽  
Michael J. Natan ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Self Assembly ◽  
Ohmic Contacts ◽  
Electronic Devices ◽  
Building Blocks ◽  
Anisotropic Particles ◽  
Functional Nanostructures ◽  
Electrochemically Deposited ◽  
Multilayered Nanowires ◽  
Surface Chemistries

AbstractNanostructures are electrochemically deposited into alumina or polycarbonate templates resulting in monodisperse, anisotropic particles with a range of tunable sizes. These particles have been synthesized with diameters of 20–250 nm and with lengths of 1–10 μm. Currently, structures have been made with stripes of Au, Ag, CdSe, Co, Cu, Ni, Pd, and Pt. These materials offer a variety of different properties. In particular, many of the metals in this group are excellent conductors, meaning these particles can actually be used as nanowires. Co and Ni are ferromagnetic and may be used for separation or assembly. CdSe is a semiconductor, possibly allowing for the synthesis of electronic devices such as transistors. Furthermore, many of these materials have different surface chemistries, making the orthogonal functionalization and assembly of these nanowires more accessible. This research focuses on increasing the number of materials available, especially semiconductors, incorporating these potentially useful materials into multilayered nanowires and evaluating their electrical properties, either individually or in small bundles. In addition, the surface chemistry of the various materials in the nanowires is being compared to aid in orthogonal self-assembly of functional nanostructures such as memory devices. The work presented will demonstrate the effects of rod composition on electrical properties. In particular, the effects of changing the work function of the materials on either side of a semiconductor to form Schottky junctions or ohmic contacts will be shown.

scholarly journals Modifying self-assembly and species separation in three-dimensional systems of shape-anisotropic particles

2016 ◽  
Vol 93 (2) ◽  
Author(s):  
C. R. K. Windows-Yule ◽  
B. J. Scheper ◽  
W. K. den Otter ◽  
D. J. Parker ◽  
A. R. Thornton
Keyword(s):  
Self Assembly ◽  
Three Dimensional ◽  
Anisotropic Particles ◽  
Species Separation

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.

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