Hybridizing poly(ε-caprolactone) and plasmonic titanium nitride ...

Supporting information

Hybridizing

poly(ε-caprolactone)

and

plasmonic

titanium

nitride

nanoparticles for broadband photo-responsive shape memory films

Satoshi Ishii,1,2,#,* Koichiro Uto,1,3,# Eri Niiyama,1,4 Mitsuhiro Ebara,1 and Tadaaki Nagao1,2 1

International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS),

Tsukuba, Ibaraki 305-0044, Japan 2

CREST, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan

3

Department of Bioengineering, University of Washington, Seattle, Washington 98195, USA

4

Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba 305-8571, Japan

# These authors contributed equally to this work. E-mail: [email protected]

Table of contents: S1. Surface modification of TiN nanoparticles

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S2. Characterization of TiN nanoparticles by TEM and XRD

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S3. Distribution of TiN nanoparticles in TiN-PCL hybrid

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S4. Differential scanning calorimetry curves of TiN-PCL hybrids

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S5. Comparative study of the threshold irradiances of photo-responsive shape memory polymers

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S6. Numerically simulated heat transfer of TiN-PCL hybrid

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References

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S1. Surface modification of TiN nanoparticles

Figure S1. Schematic drawings and photographs of TiN NPs in xylene before and after the surface modification with hexanoic acid. Surface-modified TiN NPs can disperse well in xylene as shown in the right photograph.

S2. Characterization of TiN nanoparticles by TEM and XRD

Figure S2. (a) TEM image and (b) XRD pattern of the TiN NPs (reproduced from Ref. 1).

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S3. Distribution of TiN nanoparticles in TiN-PCL hybrid

Figure S3. (a) SEM image and (b) EDX mapping of the 5 wt% TiN-PCL. In the EDX mapping, titanium is represented in red color. (c) Optical microscope image of the 5 wt% TiN-PCL. While the images (a) and (b) were taken at the identical position, image (c) was taken at a different position.

S4. Differential scanning calorimetry curves of TiN-PCL hybrids

Figure S4. Differential scanning calorimetry curves of the TiN-PCL hybrids.

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S5. Comparative study of the threshold irradiances of photo-responsive shape memory polymers Table R1 Threshold irradiance of photo-responsive polymers. Reference number in the manuscript and in SI

Threshold irradiance (irradiance/ wavelength) 2

31/2

600 mW/cm (808 nm)

32/3

270 mW/cm (365 nm), 2800 mW/cm (808 nm)

41/4

800 mW/cm (805 nm)

47/5

1000 mW/cm (805 nm)

current work

160 mW/cm (solar spectrum)

2

2

2

2

2

S6. Numerically simulated heat transfer of TiN-PCL hybrid

Figure S5. Numerically simulated temperature changes of a TiN-PCL hybrid film on a glass plate. The sizes of the TiN-PCL hybrid film and glass plate are 20×20 mm2 and 50×50 mm2, respectively. (a) Average temperatures of the TiN-PCL hybrids. (b-d) Temperatures of the TiN-PCL hybrids irradiated at 100, 130 and 160 mW/cm2 after 600 s. The final temperatures of the TiN-PCL hybrid irradiated at 130 and 160 mW/cm2 are higher than the melting temperature (~47 °C).

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References 1.

Ishii, S.; Sugavaneshwar, R. P.; Nagao, T. Titanium Nitride Nanoparticles as Plasmonic SolarHeat Transducers. J. Phys. Chem. C 2016, accepted DOI: 10.1021/acs.jpcc.5b09604.

2.

Kohlmeyer, R. R.; Lor, M.; Chen, J. Remote, Local, and Chemical Programming of Healable Multishape Memory Polymer Nanocomposites. Nano Lett. 2012, 12, 2757-2762.

3.

Yu, L.; Wang, Q.; Sun, J.; Li, C.; Zou, C.; He, Z.; Wang, Z.; Zhou, L.; Zhang, L.; Yang, H. Multi-Shape-Memory Effects in Wavelength-Selective Multicomposites. J. Mater. Chem. A 2015.

4.

Shou, Q.; Uto, K.; Lin, W.-C.; Aoyagi, T.; Ebara, M. Near-Infrared-Irradiation-Induced Remote Activation of Surface Shape-Memory to Direct Cell Orientations. Macromol. Chem. Phys. 2014, 215, 2473-2481.

5.

Shou, Q.; Uto, K.; Iwanaga, M.; Ebara, M.; Aoyagi, T. Near-Infrared Light-Responsive ShapeMemory Poly([epsiv]-caprolactone) Films that Actuate in Physiological Temperature Range. Polym J 2014, 46, 492-498.

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