Synthesis of red/black phosphorus-based composite nanosheets with Z-scheme heterostructure for high-performance cancer phototherapy

Nanoscale ◽  
2021 ◽  
Author(s):  
Yong Kang ◽  
Zhengjun Li ◽  
Fengying Lu ◽  
Zhiguo Su ◽  
Xiaoyuan Ji ◽  
...  
Keyword(s):  
High Performance ◽  
Research Field ◽  
Black Phosphorus ◽  
Two Dimensional ◽  
The Poor ◽  
Low Efficiency ◽  
Poor Stability

Two dimensional black phosphorus nanosheets (BP NS) have attracted plenty of attentions in the research field of cancer photonic therapy. However, the poor stability and relatively low efficiency in reactive...

scholarly journals Robust trap effect in transition metal dichalcogenides for advanced multifunctional devices

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Lei Yin ◽  
Peng He ◽  
Ruiqing Cheng ◽  
Feng Wang ◽  
Fengmei Wang ◽  
...  
Keyword(s):  
Transition Metal ◽  
High Performance ◽  
Infrared Detector ◽  
Transition Metal Dichalcogenides ◽  
Two Dimensional ◽  
Electric Transport ◽  
Defect Engineering ◽  
Fast Switching ◽  
Metal Dichalcogenides ◽  
Poor Stability

Abstract Defects play a crucial role in determining electric transport properties of two-dimensional transition metal dichalcogenides. In particular, defect-induced deep traps have been demonstrated to possess the ability to capture carriers. However, due to their poor stability and controllability, most studies focus on eliminating this trap effect, and little consideration was devoted to the applications of their inherent capabilities on electronics. Here, we report the realization of robust trap effect, which can capture carriers and store them steadily, in two-dimensional MoS2xSe2(1-x) via synergistic effect of sulphur vacancies and isoelectronic selenium atoms. As a result, infrared detection with very high photoresponsivity (2.4 × 105 A W−1) and photoswitching ratio (~108), as well as nonvolatile infrared memory with high program/erase ratio (~108) and fast switching time, are achieved just based on an individual flake. This demonstration of defect engineering opens up an avenue for achieving high-performance infrared detector and memory.

scholarly journals Advances and Challenges in Two-Dimensional Organic–Inorganic Hybrid Perovskites Toward High-Performance Light-Emitting Diodes

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Miao Ren ◽  
Sheng Cao ◽  
Jialong Zhao ◽  
Bingsuo Zou ◽  
Ruosheng Zeng
Keyword(s):  
High Performance ◽  
Light Emitting Diodes ◽  
Structural Diversity ◽  
Two Dimensional ◽  
Light Emitting ◽  
Quantum Well Structures ◽  
Perovskite Materials ◽  
Energy Funnel ◽  
Recent Developments ◽  
Low Efficiency

AbstractTwo-dimensional (2D) perovskites are known as one of the most promising luminescent materials due to their structural diversity and outstanding optoelectronic properties. Compared with 3D perovskites, 2D perovskites have natural quantum well structures, large exciton binding energy (Eb) and outstanding thermal stability, which shows great potential in the next-generation displays and solid-state lighting. In this review, the fundamental structure, photophysical and electrical properties of 2D perovskite films were illustrated systematically. Based on the advantages of 2D perovskites, such as special energy funnel process, ultra-fast energy transfer, dense film and low efficiency roll-off, the remarkable achievements of 2D perovskite light-emitting diodes (PeLEDs) are summarized, and exciting challenges of 2D perovskite are also discussed. An outlook on further improving the efficiency of pure-blue PeLEDs, enhancing the operational stability of PeLEDs and reducing the toxicity to push this field forward was also provided. This review provides an overview of the recent developments of 2D perovskite materials and LED applications, and outlining challenges for achieving the high-performance devices."Image missing"

scholarly journals Recent Progress in Two-Dimensional MoTe2 Hetero-Phase Homojunctions

Nanomaterials ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 110
Author(s):  
Jing Guo ◽  
Kai Liu
Keyword(s):  
High Performance ◽  
Recent Progress ◽  
Field Effect Transistors ◽  
Metallic Phase ◽  
Research Field ◽  
Two Dimensional ◽  
Small Energy ◽  
Potential Applications ◽  
Clean Interface ◽  
Two Phases

With the demand for low contact resistance and a clean interface in high-performance field-effect transistors, two-dimensional (2D) hetero-phase homojunctions, which comprise a semiconducting phase of a material as the channel and a metallic phase of the material as electrodes, have attracted growing attention in recent years. In particular, MoTe2 exhibits intriguing properties and its phase is easily altered from semiconducting 2H to metallic 1T′ and vice versa, owing to the extremely small energy barrier between these two phases. MoTe2 thus finds potential applications in electronics as a representative 2D material with multiple phases. In this review, we briefly summarize recent progress in 2D MoTe2 hetero-phase homojunctions. We first introduce the properties of the diverse phases of MoTe2, demonstrate the approaches to the construction of 2D MoTe2 hetero-phase homojunctions, and then show the applications of the homojunctions. Lastly, we discuss the prospects and challenges in this research field.

scholarly journals Hydrothermally derived p-n MoS2-ZnO from p-p MoS2-ZIF-8 for efficient detection of NO2 at room temperature

2021 ◽  
Author(s):  
Muhammad Ikram ◽  
He Lv ◽  
Zhuo Liu ◽  
Keying Shi ◽  
Yongxiang Gao
Keyword(s):  
Energy Storage ◽  
Transition Metals ◽  
Room Temperature ◽  
Gas Sensing ◽  
Two Dimensional ◽  
Research Attention ◽  
The Poor ◽  
Efficient Detection ◽  
Poor Stability

Two-dimensional transition metals dichalcogenide (2D-TMDs), and semiconductors metals oxides (MOs) have triggered enormous research attention in the field of energy storage, catalysis, and gas sensing. However, the poor stability of...

Black-phosphorus-analogue tin monosulfide: an emerging optoelectronic two-dimensional material for high-performance photodetection with improved stability under ambient/harsh conditions

2018 ◽  
Vol 6 (36) ◽  
pp. 9582-9593 ◽  
Author(s):  
Weichun Huang ◽  
Zhongjian Xie ◽  
Taojian Fan ◽  
Jiagen Li ◽  
Yunzheng Wang ◽  
...  
Keyword(s):  
High Performance ◽  
Black Phosphorus ◽  
Two Dimensional ◽  
Improved Stability ◽  
Harsh Conditions

Black-phosphorus-analogue tin monosulfide was successfully introduced to resolve the instability issue of black phosphorus.

scholarly journals Fully printed high performance humidity sensors based on two-dimensional materials

Nanoscale ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 5599-5606 ◽  
Author(s):  
P. He ◽  
J. R. Brent ◽  
H. Ding ◽  
J. Yang ◽  
D. J. Lewis ◽  
...  
Keyword(s):  
High Performance ◽  
Humidity Sensor ◽  
High Sensitivity ◽  
Black Phosphorus ◽  
Two Dimensional ◽  
Humidity Sensors ◽  
Two Dimensional Materials ◽  
Very High

We present the results from an all inkjet printed 2D-black phosphorus humidity sensor displaying very high sensitivity.

Controllable Synthesis of Pt Functionalized Black Phosphorus (BP) Nanocomposite for High Performance NOx Gas Sensor

2021 ◽  
Vol 21 (9) ◽  
pp. 4786-4791
Author(s):  
Ying Liang ◽  
Hongmei Bi
Keyword(s):  
High Performance ◽  
Bulk Material ◽  
Low Cost ◽  
Pt Nanoparticles ◽  
High Sensitivity ◽  
Black Phosphorus ◽  
Two Dimensional ◽  
Uniform Size ◽  
Short Period ◽  
Low Power Dissipation

Compared with bulk material-based sensors, functional sensors fabricated with nanomaterials have many advantages, such as high sensitivity, multifunctional integration, low power-dissipation, and low cost. Black phosphorus (BP) is a two-dimensional (2D) crystal material, which has a higher molecular adsorption energy, tunable direct band gap, high carrier mobility, ambipolar characteristics, and high current on/off ratio. In this paper, BP bulk was ground into powder, and then the powder was dispersed in dimethylformamide (DMF) to obtain two-dimensional BP nanosheets solution. Afterwards, the black phosphorus nanosheets and H2PtCl6 solution were mixed to obtain the Pt functionalized BP nanocomposite by one-step reduction method. Pt nanoparticles were dispersed on the surface of BP nanosheets with highly uniform size. The Pt functionalized BP nanocomposite exhibited a high response of 2.19 to 10 ppm NOx in a short period of 1.93 s at room temperature. The detection limit was as low as 30 ppb. The Pt functionalized BP nanocomposite will be useful for precise detection of NOx.

Highly sensitive g-C3N4 nanosheets as a potential candidate for the effective detection of NO2 gas via langasite based surface acoustic wave gas sensor

2021 ◽  
Author(s):  
Kedhareswara Sairam Pasupuleti ◽  
Dongjin Nam ◽  
Na-hyun Bak ◽  
Reddeppa Maddaka ◽  
Jae-Eung Oh ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
Gas Sensor ◽  
Surface Acoustic Wave ◽  
Chemical Properties ◽  
Potential Candidate ◽  
Two Dimensional ◽  
Sensor Applications ◽  
The Poor ◽  
Highly Sensitive ◽  
Poor Stability

In view of the fact, the poor stability and inadequate chemical properties of conductive polymers inhibit their use in gas sensor applications. Aside from this, the elegant two-dimensional (2D) polymeric...

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