Building blocks for one-dimensional van der Waals heterostructures

Xiang, Rong; Maruyama, Shigeo; Li, Yan

doi:10.1360/nso/20220016

Cited by 3 publications

(3 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One-dimensional van der Waals (1D vdW) heterostructures are an emerging class of nanomaterials that consist of coaxially stacked atomically thin layers, including graphene, boron nitride (BN), molybdenum disulfide (MoS 2 ), tungsten disulfide (WS 2 ), and others. , Each of these layers exhibits distinct physical properties, with some being metallic, semiconducting, or insulating . Combining them into a single structure not only leads to a vast number of potential applications in various fields, including (opto)electronics, photovoltaics, and electrochemistry, , but also results in intriguing physical phenomena arising from crystal lattice mismatch or quantum confinement, such as moiré flat bands and strongly correlated electronic states. , …”

Section: Introductionmentioning

confidence: 99%

Evaluating the Efficiency of Boron Nitride Coating in Single-Walled Carbon-Nanotube-Based 1D Heterostructure Films by Optical Spectroscopy

Wang,

Levshov,

Otsuka

et al. 2024

ACS Nano

Self Cite

View full text Add to dashboard Cite

Single-walled carbon nanotube (SWCNT) films exhibit exceptional optical and electrical properties, making them highly promising for scalable integrated devices. Previously, we employed SWCNT films as templates for the chemical vapor deposition (CVD) synthesis of one-dimensional heterostructure films where boron nitride nanotubes (BNNTs) and molybdenum disulfide nanotubes (MoS 2 NTs) were coaxially nested over the SWCNT networks. In this work, we have further refined the synthesis method to achieve precise control over the BNNT coating in SWCNT@BNNT heterostructure films. The resulting structure of the SWCNT@BNNT films was thoroughly characterized using a combination of electron microscopy, UV−vis−NIR spectroscopy, Fouriertransform infrared (FT-IR) spectroscopy, and Raman spectroscopy. Specifically, we investigated the pressure effect induced by BNNT wrapping on the SWCNTs in the SWCNT@BNNT heterostructure film and demonstrated that the shifts of the SWCNT's G and 2D (G′) modes in Raman spectra can be used as a probe of the efficiency of BNNT coating. In addition, we studied the impact of vacuum annealing on the removal of the initial doping in SWCNTs, arising from exposure to ambient atmosphere, and examined the effect of MoO 3 doping in SWCNT films by using UV−vis−NIR spectroscopy and Raman spectroscopy. We show that through correlation analysis of the G and 2D (G′) modes in Raman spectra, it is possible to discern distinct types of doping effects as well as the influence of applied pressure on the SWCNTs within SWCNT@BNNT heterostructure films. This work contributes to a deeper understanding of the strain and doping effect in both SWCNTs and SWCNT@BNNTs, thereby providing valuable insights for future applications of carbon-nanotube-based one-dimensional heterostructures.

show abstract

Section: Introductionmentioning

confidence: 99%

Evaluating the Efficiency of Boron Nitride Coating in Single-Walled Carbon-Nanotube-Based 1D Heterostructure Films by Optical Spectroscopy

Wang,

Levshov,

Otsuka

et al. 2024

ACS Nano

Self Cite

View full text Add to dashboard Cite

show abstract

“…Up until now, the template synthesis has been limited to MoS 2 NTs, while the structure of SW‐TMDNTs with various compositions and morphologies has been proposed (Figure 1b). [ 46 ] Exploring the chirality distribution and chemical variation of SW‐TMDNTs is the first step in characterizing their fundamental electronic behavior and potential applications.…”

Section: Introductionmentioning

confidence: 99%

Structural Diversity of Single‐Walled Transition Metal Dichalcogenide Nanotubes Grown via Template Reaction

Nakanishi,

Furusawa,

Sato

et al. 2023

Advanced Materials

View full text Add to dashboard Cite

Monolayers of transition metal dichalcogenides (TMDs) are an ideal 2D platform for studying a wide variety of electronic properties and potential applications due to their chemical diversity. Similarly, single‐walled TMD nanotubes (SW‐TMDNTs)—seamless cylinders of rolled‐up TMD monolayers—are 1D materials that can exhibit tunable electronic properties depending on both their chirality and composition. However, much less has been explored about their geometrical structures and chemical variations due to their instability under ambient conditions. Here, the structural diversity of SW‐TMDNTs templated by boron nitride nanotubes (BNNTs) is reported. The outer surfaces and inner cavities of the BNNTs promote and stabilize the coaxial growth of SW‐TMDNTs with various diameters, including few‐nanometers‐wide species. The chiral indices (n,m) of individual SW‐MoS2NTs are assigned by high‐resolution transmission electron microscopy, and statistical analyses reveals a broad chirality distribution ranging from zigzag to armchair configurations. Furthermore, this methodology can be applied to the synthesis of various TMDNTs, such as selenides and alloyed Mo1−xWxS2. Comprehensive microscopic and spectroscopic analyses also suggest the partial formation of Janus MoS2(1−x)Se2x nanotubes. The BNNT‐templated reaction provides a universal platform to characterize the chirality‐dependent properties of 1D nanotubes with various electronic structures.

show abstract

“…[15][16][17][18][19][20][21][22] In recent years, such 1D van der Waals heterostructures have emerged as a new frontier in lowdimensional materials science. 23,24 More significantly, the electronic, magnetic, and optical properties of host CNTs can be modulated by the guest species. 25 For example, when Gd compounds are inserted into CNTs, the filling CNTs can exhibit paramagnetic behaviors.…”

mentioning

confidence: 99%

Gd-Encapsulated Carbon Nanotubes as Dual-Modal Probes for Magnetic Resonance and Second Near-Infrared Emission

Nakanishi

Nagata

Yasui

et al. 2022

ECS J. Solid State Sci. Technol.

View full text Add to dashboard Cite

We report a near-infrared (NIR) fluorescence and magnetic resonance (MR) dual-modal probe composed of fluorescent carbon nanotubes (CNTs) filled with paramagnetic Gd ions. The Gd-filled CNTs are synthesized by means of a vapor-phase technique using gadolinium halides as precursors, and host CNTs exhibit the strong photoluminescence even after Gd filling. We have investigated the NIR fluorescence and MR imaging in vivo as well as in vitro, and demonstrated that the Gd-filled CNTs can be used for the dual-modal imaging of tissues and vessels in the living mice.

show abstract

Building blocks for one-dimensional van der Waals heterostructures

Cited by 3 publications

References 43 publications

Evaluating the Efficiency of Boron Nitride Coating in Single-Walled Carbon-Nanotube-Based 1D Heterostructure Films by Optical Spectroscopy

Evaluating the Efficiency of Boron Nitride Coating in Single-Walled Carbon-Nanotube-Based 1D Heterostructure Films by Optical Spectroscopy

Structural Diversity of Single‐Walled Transition Metal Dichalcogenide Nanotubes Grown via Template Reaction

Gd-Encapsulated Carbon Nanotubes as Dual-Modal Probes for Magnetic Resonance and Second Near-Infrared Emission

Contact Info

Product

Resources

About