RUS
25.11.2017  
  


Biomimetic method to fabrication of metallic nanostructured mesoscopic models

Strukov  Gennady  V.,  Strukova  Galina K.

E-mail: strukova@issp.ac.ru

Metallic  nanostructured mesostructures are formed as a result of their self-assembly while growing of nanoclusters and nanowires during the pulsed current electrodeposition process on the membranes.

Our work shows that the pulsed current electrodeposition on the templates is a general biomimetic method to fabrication of metal models of natural objects: protozoa, plants, mushrooms, shells. The resulting metal copy reproduce the Benoit Mandelbrot classic natural fractals.

Pd-Ni alloy

We have shown the possibility to control mold shapes and found the conditions ensuring fabrication of a single type of shell-like convex-concave structures.

The inner surface of shell  is a picture of  the  metallic electrospun,  can be  seen the  grid lines of growth  as “meridians” and “parallels”

The outer surface is formed by either “nanoflowers" or nanowires. In this case, the outer surface of the shell looks like a brush

Hypothesis of morphogenesis:

We assume that pulsed growth on the membranes is a morphogenesis’ tool for most  plants, mushrooms and shells

 

Nature

Pd-Ni

We can definitely identify common features in the growth of mushrooms and plants and their metal models:

•The growth on the  membranes or templates

•Growth process is exercised  by the accession of the material  at  different points of growth. The location of these points affects  the shape and causes a fractal branching

•The nature of the growth process is uneven or pulsed

•This pulsed growth is accompanied by a fractal branching and self-assembly of growing clusters (fibers) and provides a hierarchical structure

The alternating electrodeposition of PbIn and PdNi alloys  allowed   to obtain a hybrid    volume  structure “fern”. Arrow-like leaves formed by four orthogonal blades are situated along the stem; the blades consist in their turn of alternating submicron columns, which consist of spherical granules of 100-200  nm.

The alternating electrodeposition of  Pb and PdNi alloys  hollow metal structure  “sedum”

The nanostructured mesostructures of the magnetic (Ni, Pd-Ni, Pd-Co), superconducting (Bi, Pb, Pb-In) and normal (Ag, Rh, Pd, Au, Cu) metals  were obtained.

It is shown that our technique enables to reproduce no only the exterior shell form but also the hierarchic layer shell structure at the nano-and microscale.

Fragments of the shalls

The layered structure
of the shell

Fragments of the shell
hierarchical structure

Nanowires  are material for  architectural
building  blocks

Layered  packing of structural
fragments

Etching of the shell surface

Before etching After etching

Nanoscopic cells
of the shell skeleton

The nanostructured mesostructures of the magnetic,
superconducting and normal metals  were obtained.
This gives prospects for fabrication of useful
"hybrid" structures and  nanodevices. Such objects
can be of interest for fundamental research of self-
assembly processes as well as for applications in
catalysis, electronics, optics, medicine, and for
fabrication of superhydrophobic surfaces.

 

 

 

Contact information

Tel.: 8(496)52 219-82
+7 906 095 4402

Fax: +7(496) 522 8160
8(496) 522 8160

Address: Institute of Solid State Physics RAS, Chernogolovka, Moscow District, 2 Academician Ossipyan str., 142432 Russia

E-mail:

WWW: www.issp.ac.ru


  
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