24 th Modern Engineering & Technology Seminar (METS 2012), Taipei, Taiwan, Nov. 11 - 14, 2012 Carbon...

24th Modern Engineering & Technology Seminar (METS 2012), Taipei, Taiwan, Nov. 11 - 14, 2012

Carbon Nanomaterials and Nanocomposites

LA-UR: 12-25532

Author: Quanxi Jia

Intended for: 24th Modern Engineering & Technology Seminar (METS 2012),Taipei, Taiwan, Nov. 11 - 14, 2012


Carbon Nanomaterials and Nanocomposites

Quanxi Jia

E-mail: [email protected]

Center for Integrated NanotechnologiesLos Alamos National Laboratory

Los Alamos, NM 87545

LAUR#:


Acknowledgements

Y. Y. Zhang, G. Zou, Y. Lin, H. Luo, S. A. Baily, N. Haberkorn, F. Ronning,N. A. Mara, L. A. Civale, A. K. Burrell, T. M. McCleskey, and E. BauerLos Alamos National Laboratory, Los Alamos, NM 87545

J. H. Lee, Z. Bi, and H. WangTexas A&M University, College Station, TX 77843

Y. T. ZhuNorth Carolina State University, Raleigh, North Carolina 27695


Outline

Introduction

Experimental details and resultsCNT/PDMS stretchable conductorsCNT/NbC composites

Summary


Unique Properties of Carbon Materials

GraphiteDiamondC60

CNTGraphene

Dai et al., Small 8, 1130 (2012).


Carbon Nanomaterialsfor Energy Conversion and Storage

Dai et al., Small 8, 1130 (2012).C60-grafted graphene for solar cells

Supercapacitors with graphene electrodes

Supercapacitors with CNT electrodes

Li-ion batteries with CNT/G hybrid electrodes

3D pillared CNT/G electrodes

Metal-free catalysts for fuel cells


Graphene-Based Displays, Electronic Devices, and Photonics

Novoselov et al., Nature 490, 192 (2012).


Outline

Introduction


Summary


Our Research on CNTs and Nanocomposites

50 µm

1 mm

Continuous CNT ribbons directly drawn from CNT array

CNT composite fibers (inorganic & organic) CNT ribbons sandwiched in polymer or in

inorganic thin films

1) Adv. Mater. 18, 3160 (2006).

2) ACS Nano 3, 2157(2009).3) Carbon 47, 3332 (2009).4) Nat. Nano. 4, 738

(2009).5) Adv. Mater. 22, 3027

(2010).

Fe (1 nm)/Al2O3(10 nm)/SiO2/Si

CVD

CNT array (spinnable)

Array thickness plays an important role in determining the performance of fibers/ribbons.


Ribbons from Long CNT Arrays

4.6 mm array

Ribbons being pulled from array

1m

20nm

Fan et al., Nature 419, 801 (2002).


Various Applications of CNT Arrays Synthesized with Special Catalyst Pretreatments

ACS Nano 3, 2157(2009).

Effect of deposition process on the alignment of CNT arrays


Different Curvatures in CNT Arrays

ACS Nano 3, 2157(2009).


Strategies Used to Achieve Stretchable Interconnections

Browden et al., Science, 393, p146 (1998).Rogers et al., Nat. Nano. 1, 201 (2006).

compressStretch

Wavy/net-shaped connections

Electronic conductance

Mechanical robustness

Stretchable interconnections

e.g. Metale.g. Rubber

Kim et al., Appl. Phys. Lett. 92, 011904 (2008).Cheng et al., Appl. Phys. Lett. 94, 144103 (2009).

Liquid Metal/alloy

Stretch

Liquid metal/alloy- filled channels


Schematic Illustration of the Formation of CNT/PDMS Films

Uncured PDMS

CNT ribbon

(1) Lay CNT ribbons on PDMS sheet

PDMS

Electrode

(2) Fabricate electrodes

(3) Cover the CNTs with uncured PDMS

(4) Cure the PDMS

CNT ribbon embedded in PDMS

PDMS = poly(dimethylsiloxane)

Adv. Mater. 22, 3027 (2010).


Transparent and Flexible CNT/PDMS Composite Films

16

3 cm

Transparent (~60 %)

Flexible

300 400 500 600 700 8000

20

40

60

80

100

Tra

ns

mit

tan

ce

(%

)

Wavelengh (nm)

PDMS

CNT/PDMS


Resistance ~ Strain Characteristics of CNT/PDMS Composite Films

0%

50%

100%

1st stretching

2nd stretching

4

0 20 40 60 80 100 1201.5x104

2.0x104

2.5x104

3.0x104

3.5x104

4.0x104

4.5x104

5.0x10

Strain (%)

Resi

stan

ce(O

hm)

1st releasing


Resistance ~ Strain Relationship of CNT/PDMS Composite Films

0 20 40 60 80 1001.5x10 4

2.0x10 4

2.5x10 4

3.0x10 4

3.5x10 4

4.0x10 4

4.5x10 4

5.0x10 4

Strain/%

Resistance

/oh

m

6th stretching30th stretching

Ten samples have been measured and similar resistance variation behaviors during stretching/releasing have been observed.

Sekitani et al., Science 21, 1468 (2008).

Hu et al., Appl. Phys. Lett. 94, 16110 (2009).

50 times

10 times


Outline

Introduction


Summary


Different Techniques Availableto Grow Thin Films

Physical vapor deposition (PVD)Sputtering, e-beam evaporation, molecular beam

epitaxy, pulsed laser depositionChemical vapor deposition (CVD)

Plasma-enhanced CVD, low pressure CVD, metal-organic CVD

Chemical solution deposition (CSD)Sol-gel, metal-organic decomposition (MOD)

24 th Modern Engineering & Technology Seminar (METS 2012), Taipei, Taiwan, Nov. 11 - 14, 2012 Carbon...

Documents

Transcript of 24 th Modern Engineering & Technology Seminar (METS 2012), Taipei, Taiwan, Nov. 11 - 14, 2012 Carbon...