scholarly journals Vibrational Properties of a Naturally Occurring Semiconducting van der Waals Heterostructure

2021 ◽  
Author(s):  
Viviane Zurdo Costa ◽  
Liangbo Liang ◽  
Sam Vaziri ◽  
Addison Miller ◽  
Eric Pop ◽  
...  
Keyword(s):  
Van Der Waals ◽  
Vibrational Properties ◽  
Naturally Occurring ◽  
Van Der Waals Heterostructure

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 Natural van der Waals heterostructure cylindrite with highly anisotropic optical responses

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Arindam Dasgupta ◽  
Jie Gao ◽  
Xiaodong Yang
Keyword(s):  
Van Der Waals ◽  
Linear Dichroism ◽  
Third Harmonic ◽  
Inhomogeneous Strain ◽  
Optical Responses ◽  
Naturally Occurring ◽  
Van Der Waals Heterostructure ◽  
Vdw Heterostructure ◽  
Polarized Raman ◽  
On Chip

AbstractThe mechanical exfoliation of naturally occurring layered materials has emerged as an easy and effective method for achieving ultrathin van der Waals (vdW) heterostructures with well-defined lattice orientations of the constituent two-dimensional (2D) material layers. Cylindrite is one such naturally occurring vdW heterostructure, where the superlattice is composed of alternating stacks of SnS2-like and PbS-like layers. Although the constituent 2D lattices are isotropic, inhomogeneous strain occurring from local atomic alignment for forcing the commensuration makes the cylindrite superlattice structurally anisotropic. Here, we demonstrate the highly anisotropic optical responses of cylindrite thin flakes induced by the anisotropic crystal structure, including angle-resolved polarized Raman scattering, linear dichroism, and polarization-dependent anisotropic third-harmonic generation. Our results provide a promising approach for identifying various natural vdW heterostructure-based 2D materials with tailored optical properties and can be harnessed for realizing anisotropic optical devices for on-chip photonic circuits and optical information processing.

scholarly journals Franckeite as a naturally occurring van der Waals heterostructure

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Aday J. Molina-Mendoza ◽  
Emerson Giovanelli ◽  
Wendel S. Paz ◽  
Miguel Angel Niño ◽  
Joshua O. Island ◽  
...  
Keyword(s):  
Van Der Waals ◽  
Naturally Occurring ◽  
Van Der Waals Heterostructure

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 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.

Misfit layer SnTiS3: An assemble-free van der Waals heterostructure SnS/TiS2 for lithium ion battery anode

2021 ◽  
Vol 494 ◽  
pp. 229712
Author(s):  
Yue-E Huang ◽  
Weilin Lin ◽  
Chenguang Shi ◽  
Li Li ◽  
Kaiqing Fan ◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
Van Der Waals ◽  
Lithium Ion ◽  
Van Der Waals Heterostructure ◽  
Battery Anode

A first-principles study on the electronic and optical properties of a type-II C2N/g-ZnO van der Waals heterostructure

2021 ◽  
Vol 23 (6) ◽  
pp. 3963-3973
Author(s):  
Jianxun Song ◽  
Hua Zheng ◽  
Minxia Liu ◽  
Geng Zhang ◽  
Dongxiong Ling ◽  
...  
Keyword(s):  
Optical Properties ◽  
Dft Calculations ◽  
First Principles ◽  
Van Der Waals ◽  
Band Alignment ◽  
Type Ii ◽  
Electronic And Optical Properties ◽  
Direct Bandgap ◽  
Van Der Waals Heterostructure ◽  
Vdw Heterostructure

The structural, electronic and optical properties of a new vdW heterostructure, C2N/g-ZnO, with an intrinsic type-II band alignment and a direct bandgap of 0.89 eV at the Γ point are extensively studied by DFT calculations.

Realizing efficient CO2 photoreduction in Bi3O4Cl: Constructing van der Waals heterostructure with g-C3N4

2021 ◽  
Vol 409 ◽  
pp. 128178
Author(s):  
Yixue Xu ◽  
Xiaoli Jin ◽  
Teng Ge ◽  
Haiquan Xie ◽  
Ruixue Sun ◽  
...  
Keyword(s):  
Van Der Waals ◽  
Co2 Photoreduction ◽  
Van Der Waals Heterostructure
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