Evolution of Graphene Patterning: From Dimension Regulation to Molecular Engineering

Wei, Tao; Hauke, Frank; Hirsch, Andreas

doi:10.1002/adma.202104060

Cited by 56 publications

(46 citation statements)

References 202 publications

(206 reference statements)

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“…One of the more well‐known examples is that of graphene, which has high electron mobility 148 . However, the related electronic applications for graphene‐based semiconductors are currently limited due to its deficient band gap.…”

Section: Applications Of Nanopatterned Materialsmentioning

confidence: 99%

“…One of the more well-known examples is that of graphene, which has high electron mobility. 148 However, the related electronic applications for graphene-based semiconductors are currently limited due to its deficient band gap. Myungwoong Kim et al 25 patterned graphene-based 2D quantum well antidot lattices using BCP lithography resulting in sub-20 nm features across >1 mm 2 areas.…”

Section: Optoelectronic Effect Driven By Nanoconfinementmentioning

confidence: 99%

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Advanced unconventional techniques for sub‐100 nm nanopatterning

Guo

Min

et al. 2022

InfoMat

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Patterned nanostructures with ultrasmall features endow functional devices with unique nanoconfinement and performance enhancements. The increasing demand for miniaturization has stimulated the development of sub-100 nm nanopatterning techniques. Beyond conventional lithography-which is limited by unavoidable factors-advanced patterning techniques have been reported to produce nanoscale features down to molecular or even atomic scale. In this review, unconventional techniques for sub-100 nm nanopatterning are discussed, in particular the principles by which to achieve the desired patterns (among other important issues). Such techniques can be classified into three categories: template-replica, template-induced, and template-free techniques. Moreover, multi-dimensional nanostructures consist of various building materials, the unique properties of which are summarized. Finally, the remaining challenges and opportunities for large-scale patterning, the improvement of device performance, the multi-dimensional nanostructures of biocompatible materials, molecular-scale patterning, and the carbon footprint requirements for future nanofabrication processes are discussed.

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Section: Applications Of Nanopatterned Materialsmentioning

confidence: 99%

Section: Optoelectronic Effect Driven By Nanoconfinementmentioning

confidence: 99%

Advanced unconventional techniques for sub‐100 nm nanopatterning

Guo

Min

et al. 2022

InfoMat

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“…In the visible region, materials such as Sapphire, Quartz, polydimethylsiloxane, and graphene can be used as indicated in [126]. The authors in [127] and [128] highlighted suspended nano disk, reconfigurable color filters based on suspended rectangular and elliptical lithium niobate (LiNbO3) on Si substrate, coated with a mirror layer; nanowire with ultra-low refractive index; tuning can also be performed by varying the helicity of the incident light.…”

Section: A Optical Ris Vs Rf Rismentioning

confidence: 99%

RIS-Assisted Visible Light Communication Systems: A Tutorial

Aboagye¹,

Ndjiongue²,

Ngatched³

et al. 2022

Preprint

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Recent intensive and extensive development of the fifth-generation (5G) of cellular networks has led to their deployment throughout much of the world. As part of this implementation, one of the challenges that must be addressed is the skip-zone problem, which occurs when objects such as trees, people, animals, and vehicles obstruct the transmission of signals.In free-space optical (FSO) and radio frequency (RF) systems, dead zones are most often caused by buildings and trees, while in visible light communications (VLC), obstructions are caused by individuals moving around a room or objects placed in the room. A signal obstruction can significantly reduce the signal-to-noise ratio in RF and indoor VLC systems, whereas in FSO systems, where the transmitted signals are directional, the obstruction can completely disrupt data transmission. Therefore, the skipzone dilemma must be resolved to ensure the smooth and efficient operation of 5G and beyond networks. By placing a relay between a transmitter and a receiver, the effects of obstacles can be mitigated. As a result, the signal from the transmitter will reach the receiver. In recent years, reconfigurable intelligent surfaces (RISs) that are more efficient than relays have become widely accepted as a method of mitigating skip-zones and providing reconfigurable radio environments. However, there have been limited studies on RISs for optical wireless communication (OWC) systems. Through the RIS technology, OWC and RF communication channels can be reconfigured. This paper aims to provide a comprehensive tutorial on indoor VLC systems utilizing RIS technology. The article discusses the basics of VLC and RISs and reintroduces RISs for OWC systems, focusing on RIS-assisted indoor VLC systems. We also provide a comprehensive overview of optical RISs and examine the differences between optical RISs, RF-RISs, and optical relays. Furthermore, we discuss in detail how RISs can be used to overcome line-of-sight blockages and the device orientation issue in VLC systems while revealing key challenges such as RIS element orientation design, RIS elements to access point/user assignment design, and RIS array positioning design problems that need to be studied. Moreover, we discuss and propose several research problems on integrating optical RISs with other emerging technologies, including non-orthogonal multiple access, multiple-input multiple-output systems, physical layer security, and simultaneous lightwave and power transfer in VLC systems. Finally, we highlight other important research directions that can further improve the performance of RISassisted VLC systems.

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“…Materials science, which has experienced a series of stages (from natural materials to independent synthesis, from direct usage to the study of their components, from common technology to artificial intelligence), occupies a crucial place in human history. Today, more and more emerging materials (graphene [ 1 , 2 , 3 , 4 , 5 ], perovskite [ 6 , 7 , 8 , 9 , 10 ], etc.) with special structures (MOF [ 11 , 12 , 13 , 14 , 15 ], COF [ 16 , 17 , 18 , 19 , 20 ], etc.)…”

Section: Introductionmentioning

confidence: 99%

A Review of Performance Prediction Based on Machine Learning in Materials Science

Liu

Huang

et al. 2022

Nanomaterials

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With increasing demand in many areas, materials are constantly evolving. However, they still have numerous practical constraints. The rational design and discovery of new materials can create a huge technological and social impact. However, such rational design and discovery require a holistic, multi-stage design process, including the design of the material composition, material structure, material properties as well as process design and engineering. Such a complex exploration using traditional scientific methods is not only blind but also a huge waste of time and resources. Machine learning (ML), which is used across data to find correlations in material properties and understand the chemical properties of materials, is being considered a new way to explore the materials field. This paper reviews some of the major recent advances and applications of ML in the field of properties prediction of materials and discusses the key challenges and opportunities in this cross-cutting area.

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Evolution of Graphene Patterning: From Dimension Regulation to Molecular Engineering

Cited by 56 publications

References 202 publications

Advanced unconventional techniques for sub‐100 nm nanopatterning

Advanced unconventional techniques for sub‐100 nm nanopatterning

RIS-Assisted Visible Light Communication Systems: A Tutorial

A Review of Performance Prediction Based on Machine Learning in Materials Science

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