Layered franckeite and teallite intrinsic heterostructures: shear exfoliation and electrocatalysis

2018 ◽  
Vol 6 (34) ◽  
pp. 16590-16599 ◽  
Author(s):  
Rui Gusmão ◽  
Zdeněk Sofer ◽  
Jan Luxa ◽  
Martin Pumera
Keyword(s):  
Liquid Phase ◽  
Van Der Waals ◽  
Van Der Waals Heterostructures ◽  
Naturally Occurring

Naturally occurring van der Waals heterostructures (vdWH) undergo liquid-phase shear exfoliation and are applied in electrocatalytic energy reactions.

Covalent modification of franckeite with maleimides: connecting molecules and van der Waals heterostructures

2021 ◽  
Author(s):  
Julia Villalva ◽  
Sara Moreno-Da Silva ◽  
Palmira Villa ◽  
Luisa Ruiz-González ◽  
Cristina Navío ◽  
...  
Keyword(s):  
Click Chemistry ◽  
Van Der Waals ◽  
Covalent Modification ◽  
Van Der Waals Heterostructures ◽  
Naturally Occurring ◽  
Van Der Waals Heterostructure

We show that thiol–ene-like “click” chemistry can be used to decorate franckeite, a naturally occurring van der Waals heterostructure with maleimide reagents. In this way, we provide a pathway towards 2D–2D–0D mixed-dimensional heterostructures.

scholarly journals Simultaneous assembly of van der Waals heterostructures into multiple nanodevices

Nanoscale ◽  
2018 ◽  
Vol 10 (17) ◽  
pp. 7966-7970 ◽  
Author(s):  
Enrique Burzurí ◽  
Mariano Vera-Hidalgo ◽  
Emerson Giovanelli ◽  
Julia Villalva ◽  
Andres Castellanos-Gomez ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Van Der Waals ◽  
Van Der Waals Heterostructures

We present a fast and scalable method for the simultaneous fabrication of multiple nanodevices based on liquid-phase exfoliated van der Waals heterostructures.

scholarly journals Covalent Chemistry on a Van Der Waals Heterostructure

2019 ◽  
Author(s):  
Julia Villalva ◽  
Sara Moreno ◽  
Palmira Villa ◽  
Luisa R. González ◽  
Cristina Navío ◽  
...  
Keyword(s):  
Organic Molecules ◽  
Van Der Waals ◽  
Covalent Bond ◽  
Nir Spectroscopy ◽  
Common Goal ◽  
Van Der Waals Heterostructures ◽  
Electronic Interactions ◽  
Naturally Occurring ◽  
Van Der Waals Heterostructure ◽  
The Michael Addition

The building of van der Waals heterostructures and the decoration of 2D materials with organic molecules share a common goal: to obtain ultrathin materials with tailored properties. Performing controlled chemistry on van der Waals heterostructures would add an extra level of complexity, providing a pathway towards 2D-2D-0D mixed-dimensional heterostructures. Here we show that thiol-ene-like “click” chemistry can be used to decorate franckeite, a naturally occurring van der Waals heterostructure, with maleimide reagents. ATR-IR and NMR analyses corroborate the Michael addition mechanism via the formation of a S-C covalent bond, while Raman and HR-TEM show that the SnS<sub>2</sub>-PbS alternating structure of franckeite is preserved, and suggest that SnS<sub>2</sub>reacts preferentially, which is confirmed through XPS. We illustrate how this methodology can be used to add functional molecular moieties by decorating franckeite with porphyrins. UV-vis-NIR spectroscopy confirms that the chromophore remains operative and shows negligible electronic interactions with franckeite in the ground state, while its fluorescence is strongly quenched upon photoexcitation.

scholarly journals Charge Transfer Effects in Naturally Occurring van der Waals Heterostructures (PbSe)1.16(TiSe2)m ( m=1 , 2)

2018 ◽  
Vol 120 (10) ◽  
Author(s):  
Q. Yao ◽  
D. W. Shen ◽  
C. H. P. Wen ◽  
C. Q. Hua ◽  
L. Q. Zhang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Van Der Waals ◽  
Transfer Effects ◽  
Van Der Waals Heterostructures ◽  
Naturally Occurring

scholarly journals Covalent Chemistry on a Van Der Waals Heterostructure

2019 ◽  
Author(s):  
Julia Villalva ◽  
Sara Moreno ◽  
Palmira Villa ◽  
Luisa R. González ◽  
Andres Castellanos-Gomez ◽  
...  
Keyword(s):  
Organic Molecules ◽  
Van Der Waals ◽  
Covalent Bond ◽  
Nir Spectroscopy ◽  
Common Goal ◽  
Van Der Waals Heterostructures ◽  
Electronic Interactions ◽  
Naturally Occurring ◽  
Van Der Waals Heterostructure ◽  
The Michael Addition

The building of van der Waals heterostructures and the decoration of 2D materials with organic molecules share a common goal: to obtain ultrathin materials with tailored properties. Performing controlled chemistry on van der Waals heterostructures would add an extra level of complexity, providing a pathway towards 2D-2D-0D mixed-dimensional heterostructures. Here we show that thiol-ene-like “click” chemistry can be used to decorate franckeite, a naturally occurring van der Waals heterostructure, with maleimide reagents. ATR-IR and NMR analyses corroborate the Michael addition mechanism via the formation of a S-C covalent bond, while Raman and HR-TEM show that the SnS<sub>2</sub>-PbS alternating structure of franckeite is preserved, and suggest that SnS<sub>2</sub>reacts preferentially, which is confirmed through XPS. We illustrate how this methodology can be used to add functional molecular moieties by decorating franckeite with porphyrins. UV-vis-NIR spectroscopy confirms that the chromophore remains operative and shows negligible electronic interactions with franckeite in the ground state, while its fluorescence is strongly quenched upon photoexcitation.

scholarly journals Covalent Chemistry on a Van Der Waals Heterostructure

2019 ◽  
Author(s):  
Julia Villalva ◽  
Sara Moreno ◽  
Palmira Villa ◽  
Luisa R. González ◽  
Cristina Navío ◽  
...  
Keyword(s):  
Organic Molecules ◽  
Van Der Waals ◽  
Covalent Bond ◽  
Nir Spectroscopy ◽  
Common Goal ◽  
Van Der Waals Heterostructures ◽  
Electronic Interactions ◽  
Naturally Occurring ◽  
Van Der Waals Heterostructure ◽  
The Michael Addition

The building of van der Waals heterostructures and the decoration of 2D materials with organic molecules share a common goal: to obtain ultrathin materials with tailored properties. Performing controlled chemistry on van der Waals heterostructures would add an extra level of complexity, providing a pathway towards 2D-2D-0D mixed-dimensional heterostructures. Here we show that thiol-ene-like “click” chemistry can be used to decorate franckeite, a naturally occurring van der Waals heterostructure, with maleimide reagents. ATR-IR and NMR analyses corroborate the Michael addition mechanism via the formation of a S-C covalent bond, while Raman and HR-TEM show that the SnS<sub>2</sub>-PbS alternating structure of franckeite is preserved, and suggest that SnS<sub>2</sub>reacts preferentially, which is confirmed through XPS. We illustrate how this methodology can be used to add functional molecular moieties by decorating franckeite with porphyrins. UV-vis-NIR spectroscopy confirms that the chromophore remains operative and shows negligible electronic interactions with franckeite in the ground state, while its fluorescence is strongly quenched upon photoexcitation.

scholarly journals Passive photonic diodes based on natural van der Waals heterostructures

Nanophotonics ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 927-935
Author(s):  
Jie Li ◽  
Lin Du ◽  
Jing Huang ◽  
Yuan He ◽  
Jun Yi ◽  
...  
Keyword(s):  
High Performance ◽  
Modulation Depth ◽  
Van Der Waals ◽  
Cost Effective ◽  
Ultrafast Dynamics ◽  
Third Order ◽  
Van Der Waals Heterostructures ◽  
Naturally Occurring ◽  
The Cost ◽  
2D Crystals

AbstractVan der Waals heterostructures are composed of stacked atomically thin two-dimensional (2D) crystals to provide unprecedented functionalities and novel physics. Franckeite, a naturally occurring van der Waals heterostructure consisting of superimposed SnS2-like and PbS-like layers alternately, shows intriguing potential in versatile optoelectronic applications. Here, we have prepared the few-layer franckeite via liquid-phase exfoliation method and characterized its third-order nonlinearity and ultrafast dynamics experimentally. We have found that the layered franckeite shows low saturable intensity, large modulation depth and picosecond ultrafast response. We have designed the passive photonic diodes based on the layered franckeite/C60 cascaded film and suspension configuration and found that the passive photonic diodes exhibit stable nonreciprocal transmission of light. The experimental results show the excellent nonlinear optical performance and ultrafast response of the layered franckeite, which may make inroad for the cost effective and reliable high-performance optoelectronic devices.

scholarly journals In situ nanoscale imaging of moiré superlattices in twisted van der Waals heterostructures

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Yue Luo ◽  
Rebecca Engelke ◽  
Marios Mattheakis ◽  
Michele Tamagnone ◽  
Stephen Carr ◽  
...  
Keyword(s):  
Van Der Waals ◽  
Van Der Waals Heterostructures ◽  
Nanoscale Imaging
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