Nanopatterning Technologies of 2D Materials for Integrated Electronic and Optoelectronic Devices (Adv. Mater. 52/2022)

et al. 2022

Adv Funct Materials

The unique atomic thickness and mechanical flexibility of 2D van der Waals (vdW) materials endow them with spatial designability and constructability. It is easy to break the inherent planar construction through various spatial manipulations, thus creating vdW nanoarchitectures with nonplanar topologies. The basic properties before evolution are retained and tunable by architecture‐related feature sizes, and other newly generated properties are inspiring as they are beyond the reach of 2D allotropes, bringing great competitiveness for their encouraging applications in optoelectronics. Here, these representative nonplanar vdW nanoarchitectures (i.e., nanoscrolls, nanotubes, spiral nanopyramids, spiral nanowires, nanoshells, etc.) are summarized and their structural evolution processes are elucidated. Their fascinating nascent properties based on their distinctive structural features, focusing on generally enhanced light–matter interactions and device physics, are further introduced. Finally, their opportunities and challenges for in‐depth experimental exploration are prospected. It is a brand‐new idea to modify the properties of 2D vdW materials from micro‐ and nanostructural design and evolution, offering a solid platform for twistronics, valleytronics, and integrated nanophotonics.

Section: Nanoshellsmentioning

confidence: 99%

Emerging Nonplanar van der Waals Nanoarchitectures from 2D Allotropes for Optoelectronics

Ouyang

et al. 2022

Adv Funct Materials

“…Nevertheless, present patterning of 2D materials are mainly based on dry and wet chemical etching techniques in traditional silicon‐based fabrication methods, 51,52 which suffer from expensive and complicated processes, unavoidable materials damage and defects introduction, respectively. Great efforts have been made to develop the efficient and feasible 2D materials patterning approaches, 53 but the high‐quality and large‐scale patterned growth remains challenging, which has not yet been achieved in PtTe 2 and its THz PDs.…”

Section: Introductionmentioning

confidence: 99%

Wafer‐scale patterned growth of type‐II Dirac semimetal platinum ditelluride for sensitive room‐temperature terahertz photodetection

Dong

et al. 2023

InfoMat

As the lastly unexplored electromagnetic wave, terahertz (THz) radiation has been exploited in a plenty of contexts such as fundamental research, military and civil fields. Most recently, representative two‐dimensional (2D) topological semimetal, platinum ditelluride (PtTe2) has attracted considerable research interest in THz detection due to its unique physical properties. However, to achieve practical applications, the low‐cost, large‐scale, controllable synthesis and efficient patterning of 2D materials are key requirements, which remain a challenge for PtTe2 and its photodetectors (PDs). Herein, a facile approach is developed to obtain wafer‐scale (2‐inches) patterned PtTe2 arrays using one‐step tellurium‐vapor transformation method and micro‐Nano technology. PtTe2 PD arrays are fabricated with the as‐grown PtTe2 arrays evenly distributed on a 2‐inch wafer, exhibiting high conductivity (~2.7 × 105 S m−1) and good electrical consistency. Driven by the Dirac fermions, PtTe2 PDs achieve a broadband (0.02–0.3 THz) response with a fast response speed (~4.7 μs), a high sensitivity (~47 pW Hz−1/2) and high‐resolution transmission THz‐imaging capability, which displays the potential of large‐area THz array imaging. These results are one step towards the practical applications of integrated PD arrays based on 2D materials.

“…Functional 2D materials have developed into a huge material system that perfectly combines the structural features of traditional 2D materials, the electronic properties of conjugated functional materials, the structural variety of organic molecules, and manipulation advantage of supramolecular assembly, which have shown implications for a wide scientic community. [67][68][69] Although extensive review articles have emerged to introduce the recent advancement of 2D materials, to the best of our knowledge, only an individual aspect is focused, such as the particular kind of structure or certain type of the device application. [70][71][72][73][74] At the current stage, the ordered growth of the precursor in the 2D direction is one of the key scientic problems in the construction of synthetic 2D materials.…”

Section: Introductionmentioning

confidence: 99%

Design, synthesis, and application of some two-dimensional materials

Wang

2023

Chem. Sci.