Functional Hybridization of Molecules with 2D Semiconducting Materials

A knowledge of the behaviour of dislocations in semiconducting materials is essential to the understanding of devices which use them . This work is concerned with dislocations in alloys related to the semiconductor GaAs . Previous work on GaAs has shown that microtwinning occurs on one of the <110> rosette arms after indentation in preference to the other . We have shown that the effect of replacing some of the Ga atoms by Al results in microtwinning in both of the rosette arms.In the work to be reported dislocations in specimens of different compositions of Gax Al(1-x) As and Gax In(1-x) As have been studied by using micro indentation on a (001) face at room temperature . A range of electron microscope techniques have been used to investigate the type of dislocations and stacking faults/microtwins in the rosette arms , which are parallel to the [110] and [10] , as a function of composition for both alloys . Under certain conditions microtwinning occurs in both directions . This will be discussed in terms of the dislocation mobility.

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Photocatalysis. Irradiation conditions for testing photocatalytic properties of semiconducting materials and the measurement of these conditions

10.3403/30281372u ◽

2015 ◽

Keyword(s):

Photocatalytic Properties ◽

Semiconducting Materials

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Nano Semiconducting Materials

10.21741/9781945291050 ◽

2016 ◽

Author(s):

R. Saravanan

Keyword(s):

Semiconducting Materials

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Discotic columnar liquid-crystalline polymer semiconducting materials with high charge-carrier mobility via rational macromolecular engineering

Polymer Chemistry ◽

10.1039/c7py00364a ◽

2017 ◽

Vol 8 (21) ◽

pp. 3286-3293 ◽

Cited By ~ 19

Author(s):

Bin Mu ◽

Xingtian Hao ◽

Jian Chen ◽

Qian Li ◽

Chunxiu Zhang ◽

...

Keyword(s):

Liquid Crystalline ◽

Cost Effective ◽

Crystalline Polymer ◽

Charge Carrier Mobility ◽

Optoelectronic Device ◽

Side Chain ◽

Liquid Crystal Polymers ◽

Semiconducting Materials ◽

Organic Semiconducting Materials ◽

Device Applications

Well-prepared side-chain discotic liquid crystal polymers with shorter spacers in ordered columnar phases are fascinating and promising cost-effective, solution-processable organic semiconducting materials for various potential optoelectronic device applications.

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Impact of device scaling on the electrical properties of MoS2 field-effect transistors

Scientific Reports ◽

10.1038/s41598-021-85968-y ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Goutham Arutchelvan ◽

Quentin Smets ◽

Devin Verreck ◽

Zubair Ahmed ◽

Abhinav Gaur ◽

...

Keyword(s):

Field Effect Transistors ◽

Oxide Thickness ◽

Channel Length ◽

Contact Length ◽

Power Performance ◽

Semiconducting Materials ◽

Large Area ◽

Short Channel ◽

Device Scaling ◽

Performance Area

AbstractTwo-dimensional semiconducting materials are considered as ideal candidates for ultimate device scaling. However, a systematic study on the performance and variability impact of scaling the different device dimensions is still lacking. Here we investigate the scaling behavior across 1300 devices fabricated on large-area grown MoS2 material with channel length down to 30 nm, contact length down to 13 nm and capacitive effective oxide thickness (CET) down to 1.9 nm. These devices show best-in-class performance with transconductance of 185 μS/μm and a minimum subthreshold swing (SS) of 86 mV/dec. We find that scaling the top-contact length has no impact on the contact resistance and electrostatics of three monolayers MoS2 transistors, because edge injection is dominant. Further, we identify that SS degradation occurs at short channel length and can be mitigated by reducing the CET and lowering the Schottky barrier height. Finally, using a power performance area (PPA) analysis, we present a roadmap of material improvements to make 2D devices competitive with silicon gate-all-around devices.

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A Review of Photoelectrocatalytic Reactors for Water and Wastewater Treatment

Water ◽

10.3390/w13091198 ◽

2021 ◽

Vol 13 (9) ◽

pp. 1198

Author(s):

Stuart McMichael ◽

Pilar Fernández-Ibáñez ◽

John Anthony Byrne

Keyword(s):

Chemical Compounds ◽

Research Area ◽

Heterogeneous Photocatalysis ◽

Semiconducting Materials ◽

Electron Hole ◽

Water And Wastewater Treatment ◽

Aqueous Environments ◽

Different Types ◽

Water And Wastewater ◽

Electrical Bias

The photoexcitation of suitable semiconducting materials in aqueous environments can lead to the production of reactive oxygen species (ROS). ROS can inactivate microorganisms and degrade a range of chemical compounds. In the case of heterogeneous photocatalysis, semiconducting materials may suffer from fast recombination of electron–hole pairs and require post-treatment to separate the photocatalyst when a suspension system is used. To reduce recombination and improve the rate of degradation, an externally applied electrical bias can be used where the semiconducting material is immobilised onto an electrically conducive support and connected to a counter electrode. These electrochemically assisted photocatalytic systems have been termed “photoelectrocatalytic” (PEC). This review will explain the fundamental mechanism of PECs, photoelectrodes, the different types of PEC reactors reported in the literature, the (photo)electrodes used, the contaminants degraded, the key findings and prospects in the research area.

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Systematic Review on Human Skin-Compatible Wearable Photoplethysmography Sensors

Applied Sciences ◽

10.3390/app11052313 ◽

2021 ◽

Vol 11 (5) ◽

pp. 2313

Author(s):

Inho Lee ◽

Nakkyun Park ◽

Hanbee Lee ◽

Chuljin Hwang ◽

Joo Hee Kim ◽

...

Keyword(s):

Systematic Review ◽

Health Care ◽

Real Time ◽

Human Skin ◽

State Of The Art ◽

Electronic Devices ◽

Semiconducting Materials ◽

Physiological Conditions ◽

Technological Developments ◽

Monitoring Technologies

The rapid advances in human-friendly and wearable photoplethysmography (PPG) sensors have facilitated the continuous and real-time monitoring of physiological conditions, enabling self-health care without being restricted by location. In this paper, we focus on state-of-the-art skin-compatible PPG sensors and strategies to obtain accurate and stable sensing of biological signals adhered to human skin along with light-absorbing semiconducting materials that are classified as silicone, inorganic, and organic absorbers. The challenges of skin-compatible PPG-based monitoring technologies and their further improvements are also discussed. We expect that such technological developments will accelerate accurate diagnostic evaluation with the aid of the biomedical electronic devices.

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