fabrication of self-organized metal-polymer hybrid

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Fabrication of Self-organized Metal-Polymer

Hybrid Structures for Optics and Photonics

- Biomimetic Photonic Materials Design - �

Masatsugu SHIMOMURA, Hiroshi YABU, Daisuke ISHII, and

Yuji HIRAI�

Institute of Multidisciplinary Research for Advanced Materials

WPI Research Center : Advanced Institute for Materials Research,

Tohoku University

JST-CREST�

New Generation of Biomimetic Materials

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Butterfly wing-scale:structure color

Fibers, coating, photonics

Moth-eye structure:anti reflectant

Anti-reflection film photonics

Lotus Effect:hydrophobic

coating, painting, anti-fogging Painting, coating.. Anti-fauling

Sharkskin riblet�

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Gecko Hand:

adhesion

self-cleaning surface

Japanische Miso Suppe�� Wine Legs�

Pattern formation by Self-organization

Novel Nano Materials�

Ilya Prigogine

Self-Organized Patterns in Daily Life

Dissipative structures Far from thermal equilibrium

General physical phenomena

for any materials in any scale

Benard convection Fingering instability Dewetting phenomenon

Coffee Stain�

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Japanische Miso Suppe�� Wine Legs�

Pattern formation by Self-organization

Novel Nano Materials�

Ilya Prigogine

Self-Organized Patterns in Daily Life

Dissipative structures

General physical phenomena

for any materials in any scale

Benard convection Fingering instability Dewetting phenomenon

Coffee Stain�

Breath figures

(dewing)

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Casting of Polymer Solution under High-Humid Condition

What's happening?

In-situ optical microscopy of solution surface during solvent evaporation shows �

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Three phase line

Water

droplet

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Substrate

Condensation

of water

Evaporation

of solvent

Close packing

by capillary force

Polymer solution

Condensed water droplets

Top view

a b

Honeycomb Patterned Polymer Film

Prepared under Humid Condition

water droplets condensed on polymer solution act as template

SEM image schematic formation mechanism

100μm

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Superhydrophobic Pincushion Structure�

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Optical Properties of Metalized Honeycomb Films

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Pincushion films

Silver pincushion films

30 μm

(b)

30 μm

(c)

50 μm

(d)

Honeycomb-patterned

films

(a)

Peeling off

Silver

deposition

Glass

Silver

Polymer

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600

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Raman Shift (cm-1)

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5.0

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50 flat

pincushion

pincushion

pincushion

(b)

5 �m

Hot spot

(c)

1 �m

Silver Pincushion Arrays Prepared by Self-Organization and Vapor Deposition

Enhance Raman Scattering

Yuji Hirai, Hiroshi Yabu, Yasutaka Matsuo, Kuniharu Ijiro, and Masatsugu Shimomura

30μm

Aggregate of neurons

30μm

Proliferation of Stem Cells

Neurite Neuron

30μm

Pore-size Effect on Cultured Hippocampus Neural Cells

on Honeycomb Patterned Films

Differentiation to Neuron Differentiation to Neuron

A.Tsuruma, M.Tanaka, N.Fukushima, M.Shimomura

e-J. Surf. Sci. Nanotech 3, 159-164 (2005).

Self-Organized Superhydrophobic Hybrid Nano-&

Micro-Materials with Controllable Adhesive Force

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Water droplet manipulation by electric stimuli �

Multi Functional Properties Based on

Hierarchically Structured Biological Surfaces.

- Toward Biomimetic Material Design - ��

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