Nano-containers and nano-scaffolds Katalin Kamars Institute for - - PowerPoint PPT Presentation

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Nano-containers and nano-scaffolds Katalin Kamars Institute for - - PowerPoint PPT Presentation

Sep 03, 2022 200 likes •396 views

Nano-containers and nano-scaffolds Katalin Kamars Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, Budapest September 3, 2017 1/18 Wigner Research Centre for Physics Advanced

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SLIDE 1

Nano-containers and nano-scaffolds

Katalin Kamarás Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, Budapest

September 3, 2017 1/18

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SLIDE 2

September 3, 2017

Wigner Research Centre for Physics Advanced Structural Laboratory

FIR/MIR MIR/NIR Near field/SNOM Photoluminescence

2/18

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SLIDE 3

Hybrid structures from nanotubes

September 3, 2017 3/18

peapod adsorbed organic molecule

Nano-containers

van der Waals interaction inside nanosize reaction vessel packaging of unstable, toxic molecules

Nano-supports

π-π interaction on surface increased solubility “glue”

  • D. Eder:
  • Chem. Rev. 110,

1348 (2010)

  • exceptional properties of nanotubes:

– mechanical stability – electric conductivity

  • rganic components:

– selectivity – function Incorporation of functional units

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SLIDE 4

Coronene@SWNT

September 3, 2017 4/18

coronene both encapsulated and adsorbed adsorbed coronene dissolves in toluene ATR-IR

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SLIDE 5

Reactions inside nanotube

September 3, 2017 5/18

low-temperature filled nanotubes: no side reactions on adsorbed molecules surface can be cleaned by toluene washing adsorbed molecules do not obscure encapsulated ones Can we stop the process at the nanoribbon stage?

A.V. Talyzin, I.V. Anoshkin, A.V. Krasheninnikov, R.M. Nieminen, A.G. Nasibulin, H. Jian, E.I. Kauppinen: Nano Lett. 11, 4352 (2011)

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SLIDE 6

Following reactions by Raman spectroscopy

September 3, 2017 6/18

Resonance with nanoribbons: 500, 700, 900 ºC Resonance with nanoribbons: 700, 900 ºC DWNT formation: 1250 ºC

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SLIDE 7

Lead halide perovskites

September 3, 2017 7/18

  • E. Mosconi, A. Amat, Md.K. Nazeeruddin,
  • M. Grätzel, F. De Angelis:
  • J. Phys. Chem. C 117, 13902 (2013)
  • T. Baikie, Y. Fang, J.M. Kadro, M. Schreyer, F. Wei,

S.G. Mhaisalkar, M. Grätzel, T.J. White:

  • J. Mater. Chem. A 1, 5628 (2013)

the solar cells of the future

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SLIDE 8

Lead halide perovskites: nanoscale

September 3, 2017 8/18

  • E. Horváth, M. Spina, Zs. Szekrényes, K. Kamarás,
  • R. Gaal, D. Gachet, L. Forró:

Nano Lett. 14, 6761-6766 (2014)

CH3NH3PbI3 nanowires with 50 – 200 nm diameter

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SLIDE 9

Perovskite nanowires: using carbon nanotubes as scaffolds

September 3, 2017 9/18

CH3NH3PbI3 nanowire Transparent CNT film

  • M. Spina, B. Náfrádi,

H.M. Tóháti, K. Kamarás,

  • E. Bonvin, R. Gaal,
  • L. Forró, E. Horváth:

Nanoscale 8, 4888 (2016)

  • strong
  • transparent
  • chemically inert?

yes

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SLIDE 10

Photoinduced spectral changes

Presented as ∆

  • 1000

2000 3000 4000 5000 6000 7000

  • 0.1

0.0 0.1

NT illuminated 10 min NT-LAMI illuminated 10 min A Frequency (cm

  • 1)

Photoabsorption Photobleaching

September 3, 2017 10/18

Illumination by 633 nm light Carbon nanotubes are ideal hole transport layers!

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SLIDE 11

September 3, 2017 11/18

Boron nitride nanotubes

Both covalent and van der Waals bonds have ionic character electrons are less delocalized h-BN is an insulator with a bandgap of 6 eV folding BNNT nanotube

  • Z. Gao et al.: Nanobiomedicine, 2014, 1:7.
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SLIDE 12

September 3, 2017 12/18

Electron microscopy of BNNT

external diameter 5.62 ± 2.16 nm internal diameter 2.61 ± 1.05 nm interlayer spacing 0.32 nm (h-BN) Samples: BNNT LLC Measurements: Andrei N. Khlobystov

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SLIDE 13

September 3, 2017 13/18

Filling of BNNT

BNNT as is

shortening (~2 μm  ~500 nm)

  • pening

purification (ammonia, annealing)

BNNT open C60@BNNT

sublimation filling 600 C

  • W. Mickelson, S. Aloni, W.-Q. Han, J. Cumings,
  • A. Zettl: Science 300, 467 (2004)
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SLIDE 14

Microscopy of BNNT peapods

14/18 September 3, 2017

A.N. Khlobystov, D.A. Britz, J. Wang, S.A. O’Neil, M. Poliakoff, G.A.D. Briggs: J. Mater.

  • Chem. 14, 2852 (2004)

zigzag two-molecule layer

  • W. Mickelson, S. Aloni, W.-Q. Han, J. Cumings,
  • A. Zettl: Science 300, 467 (2004)

linear chain

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SLIDE 15

September 3, 2017 15/18

Infrared spectra of peapods

CNT

Infrared spectra

  • f C60 shielded

BNNT

C60 vibrations can be clearly seen C60 retains Ih symmetry (no splitting of vibrational bands) free rotation at room temperature

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SLIDE 16

September 3, 2017 16/18

Formation of inner nanotube

electron beam

  • W. Mickelson, S. Aloni, W.-Q. Han, J. Cumings,
  • A. Zettl: Science 300, 467 (2004)

laser 355 nm annealing 1200 C

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SLIDE 17

September 3, 2017 17/18 K.E. Walker, G.A. Rance, Á. Pekker, H.M. Tóháti, M.W. Fay, R.W. Lodge, C.T. Stoppiello,

  • K. Kamarás, A.N. Khlobystov:

Small Methods, published online, DOI: 10.1002/smtd.201700184

“Towards the world’s smallest coaxial cable”

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SLIDE 18

September 3, 2017 18/18

Funding:

VEKOP 2.3.2-16-2016-00011 VEKOP 2.3.3-15-2016-00001

Collaborators

NK 105691 SNN 118012 EU PITN-GA 2008-215399 FINELUMEN Bea Botka Ákos Botos Melinda Füstös Áron Pekker Zsolt Szekrényes Hajnalka M. Tóháti Miklós Veres Endre Horváth Bálint Náfrádi László Forró Kate E. Walker Graham A. Rance Thomas W. Chamberlain Andrei N. Khlobystov