scholarly journals Research Advances on Human-Eye-Sensitive Long Persistent Luminescence Materials

2021 ◽  
Vol 9 ◽  
Author(s):  
Yuhua Wang ◽  
Haijie Guo
Keyword(s):  
Night Vision ◽  
Persistent Luminescence ◽  
Research Directions ◽  
Full List ◽  
Human Eye ◽  
Actual Application ◽  
Group Research ◽  
Visible Light Range ◽  
Recent Developments ◽  
Application Requirements

Based on the actual application requirements of multicolor long persistent luminescence (LPL) materials, we highlight the recent developments in the last decade on human-eye-sensitive LPL materials and try to make a full list of known LPL compounds possessing wavelengths of 400–600 nm and a duration time longer than 10 h (>0.32 mcd/m2); these are more sensitive to the human eye's night vision and can be used throughout the night. We further emphasize our group research of novel LPL materials and the regulation of LPL color to enable a full palette. In the end, we try to summarize the challenges and perspectives of LPL materials for potential research directions based on our limited understandings. This review could offer new enlightenment for further exploration of new LPL materials in the visible light range and related applications.

scholarly journals Persistent luminescence nanoparticles for cancer theranostics application

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Nian Liu ◽  
Xiao Chen ◽  
Xia Sun ◽  
Xiaolian Sun ◽  
Junpeng Shi
Keyword(s):  
Uv Light ◽  
Combined Therapy ◽  
Tumor Therapy ◽  
High Sensitivity ◽  
Persistent Luminescence ◽  
Therapeutic Drugs ◽  
High Penetration ◽  
Recent Developments ◽  
Cancer Theranostics

AbstractPersistent luminescence nanoparticles (PLNPs) are unique optical materials that emit afterglow luminescence after ceasing excitation. They exhibit unexpected advantages for in vivo optical imaging of tumors, such as autofluorescence-free, high sensitivity, high penetration depth, and multiple excitation sources (UV light, LED, NIR laser, X-ray, and radiopharmaceuticals). Besides, by incorporating other functional molecules, such as photosensitizers, photothermal agents, or therapeutic drugs, PLNPs are also widely used in persistent luminescence (PersL) imaging-guided tumor therapy. In this review, we first summarize the recent developments in the synthesis and surface functionalization of PLNPs, as well as their toxicity studies. We then discuss the in vivo PersL imaging and multimodal imaging from different excitation sources. Furthermore, we highlight PLNPs-based cancer theranostics applications, such as fluorescence-guided surgery, photothermal therapy, photodynamic therapy, drug/gene delivery and combined therapy. Finally, future prospects and challenges of PLNPs in the research of translational medicine are also discussed.

scholarly journals Inclusive digital finance: the industry of equity crowdfunding

2021 ◽  
Author(s):  
Vincenzo Butticè ◽  
Silvio Vismara
Keyword(s):  
Visual Information ◽  
Entrepreneurial Finance ◽  
Industrial Dynamics ◽  
Relevant Research ◽  
Research Directions ◽  
Entrepreneurial Ventures ◽  
Equity Crowdfunding ◽  
Recent Developments

AbstractNowadays equity crowdfunding plays an important role in the entrepreneurial finance markets. To better understand the functioning of the industry, it is important to consider the entire equity crowdfunding process and all the actors involved. Equity crowdfunding platforms match indeed the demand of capital from entrepreneurial ventures with the supply of capital by investors. This manuscript is a first step in this direction, by (1) comparing equity crowdfunding with traditional sources of entrepreneurial finance; (2) discussing the potential and the perils of equity crowdfunding for inclusivity and democratization; (3) highlighting the role of visual information in digital finance; and (4) providing first insights on the industrial dynamics in equity crowdfunding. The paper gives researchers and practitioners orientation about recent developments in equity crowdfunding literature and provides relevant research directions.

scholarly journals Recent Developments of Antimony-Based Anodes for Sodium- and Potassium-Ion Batteries

2021 ◽  
Author(s):  
Bochao Chen ◽  
Ming Liang ◽  
Qingzhao Wu ◽  
Shan Zhu ◽  
Naiqin Zhao ◽  
...  
Keyword(s):  
Structural Characteristics ◽  
Low Cost ◽  
Potassium Ion ◽  
Research Progress ◽  
Research Directions ◽  
Weak Charge ◽  
Recent Developments ◽  
High Theoretical Capacity ◽  
Further Development ◽  
Sodium And Potassium

AbstractThe development of sodium-ion (SIBs) and potassium-ion batteries (PIBs) has increased rapidly because of the abundant resources and cost-effectiveness of Na and K. Antimony (Sb) plays an important role in SIBs and PIBs because of its high theoretical capacity, proper working voltage, and low cost. However, Sb-based anodes have the drawbacks of large volume changes and weak charge transfer during the charge and discharge processes, thus leading to poor cycling and rapid capacity decay. To address such drawbacks, many strategies and a variety of Sb-based materials have been developed in recent years. This review systematically introduces the recent research progress of a variety of Sb-based anodes for SIBs and PIBs from the perspective of composition selection, preparation technologies, structural characteristics, and energy storage behaviors. Moreover, corresponding examples are presented to illustrate the advantages or disadvantages of these anodes. Finally, we summarize the challenges of the development of Sb-based materials for Na/K-ion batteries and propose potential research directions for their further development.

scholarly journals An Overview of Flood Risk Analysis Methods

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 474
Author(s):  
Daniel Constantin Diaconu ◽  
Romulus Costache ◽  
Mihnea Cristian Popa
Keyword(s):  
Core Collection ◽  
Web Of Science ◽  
Research Directions ◽  
Economic Implications ◽  
Forecasting Methods ◽  
Wide Range ◽  
Scientific Papers ◽  
Recent Developments ◽  
Flood Analysis ◽  
Temporal And Spatial

Scientific papers present a wide range of methods of flood analysis and forecasting. Floods are a phenomenon with significant socio-economic implications, for which many researchers try to identify the most appropriate methodologies to analyze their temporal and spatial development. This research aims to create an overview of flood analysis and forecasting methods. The study is based on the need to select and group papers into well-defined methodological categories. The article provides an overview of recent developments in the analysis of flood methodologies and shows current research directions based on this overview. The study was performed taking into account the information included in the Web of Science Core Collection, which brought together 1326 articles. The research concludes with a discussion on the relevance, ease of application, and usefulness of the methodologies.

Frontiers in Service Science: Fintech Operations—An Overview of Recent Developments and Future Research Directions

2021 ◽  
Vol 13 (1) ◽  
pp. 19-35
Author(s):  
Baile Lu ◽  
Shuai Hao ◽  
Michael Pinedo ◽  
Yuqian Xu
Keyword(s):  
Future Research ◽  
Algorithmic Trading ◽  
Payment Systems ◽  
Research Directions ◽  
Operational Risks ◽  
Technology Industry ◽  
Recent Developments ◽  
Future Research Directions ◽  
Conclusion Section ◽  
Financial Technology

In this paper, we provide a survey of recent developments in the fintech (financial technology) industry, focusing on the operational structures, the technologies involved, and the operational risks associated with the new systems. In particular, we discuss payment systems, algorithmic trading, robo-advisory, crowdfunding, and peer-to-peer lending. In the conclusion section, we discuss various promising research directions.

Nonlinear Vibrations of Plates: An Update of Recent Research Developments

1996 ◽  
Vol 49 (10S) ◽  
pp. S55-S62 ◽  
Author(s):  
M. Sathyamoorthy
Keyword(s):  
Nonlinear Vibrations ◽  
Laminated Composite ◽  
Composite Plates ◽  
Future Research ◽  
Research Directions ◽  
Inertia Effects ◽  
Vibration Behavior ◽  
Recent Developments ◽  
Complicating Factors ◽  
Future Research Directions

This paper comprises a survey on the nonlinear vibration analysis of plates, with emphasis on research carried out since 1987. Most of the research reviewed here deals with the effects of geometric nonlinearity on the vibration behavior of plates. Complicating factors such as material nonlinearity, geometric imperfections, transverse shear and rotatory inertia effects, and magnetic fields on the vibration behavior are included. Recent developments in the analytical and numerical methods of solution of isotropic, orthotropic as well as laminated, composite plates are presented. Experimental, analytical, and numerical investigations are included for all the cases reviewed and some general remarks are presented along with suggestions for future research directions.

The hyporheic refuge hypothesis reconsidered: a review of hydrological aspects

2011 ◽  
Vol 62 (11) ◽  
pp. 1281 ◽  
Author(s):  
Marie-José Dole-Olivier
Keyword(s):  
Large Scale ◽  
Hyporheic Zone ◽  
Benthic Assemblages ◽  
Research Directions ◽  
Multiple Functions ◽  
Recent Developments ◽  
Hyporheic Refuge

The hyporheic zone (HZ) is thought to serve multiple functions for lotic invertebrates, but its role in the persistence of benthic assemblages after disturbances (‘hyporheic refuge hypothesis’, HRH) has never been clearly demonstrated since its initial proposal in 1953. Water exchanges through the HZ appear to be crucial in determining most hyporheic processes and subsequently, in controlling directly or indirectly the distribution of hyporheic assemblages. At present, it seems that the distribution of hyporheic refugia would also be controlled by hyporheic flowpaths, explaining the non-uniform response to the HRH documented in the literature. In light of recent developments in hyporheic hydrology, it is timely to propose research directions for understanding the distribution and patchiness of hyporheic refugia. This review proposes a framework of hypotheses, based on the recognition of hyporheic flowpaths across several scales and predicting the highest refugial capacity in large-scale upwelling zones. Outcomes from this framework include the development of physical indicators measuring the ability of the HZ to protect invertebrates, the identification of river areas demonstrating the highest refuge capacity (hyporheic hotspots) and the promotion in restoration projects of suitable hydrologic exchanges for enhancing the development of hyporheic hotspots.

scholarly journals Research on Key Technologies of High-precision Location Based Service System for Intelligent Mines

2020 ◽  
Author(s):  
Jianjun Bao ◽  
WANG Haibo
Keyword(s):  
High Precision ◽  
Service System ◽  
Location Based Service ◽  
Research Directions ◽  
Key Technologies ◽  
Positioning Method ◽  
Service Oriented ◽  
The Common ◽  
Application Requirements ◽  
Common Application

Abstract Aiming at the common application requirements of intelligent mine construction for high-precision location based service, this paper analyses the present status and development of mine positioning technology, explains the technical bottlenecks and construction goals in the existing system, discusses in detail the key technologies such as location based service system architecture, multi-source fusion positioning method, distributed service oriented system, high-precision map and 4D visualization, and finally puts forward the technical standard requirements of location based service and related mine application system research directions.

scholarly journals High Sensitivity Shortwave Infrared Photodetector Based on PbS QDs Using P3HT

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2683
Author(s):  
Jin Beom Kwon ◽  
Maeum Han ◽  
Dong Geon Jung ◽  
Seong Ho Kong ◽  
Daewoong Jung
Keyword(s):  
Autonomous Vehicles ◽  
Conductive Polymer ◽  
High Sensitivity ◽  
Hole Mobility ◽  
Night Vision ◽  
Operating Voltage ◽  
Human Eye ◽  
Highest Occupied Molecular Orbital ◽  
Low Sensitivity ◽  
Shortwave Infrared

Shortwave infrared (SWIR) photodetectors are being actively researched for their application in autonomous vehicles, biometric sensors, and night vision. However, most of the SWIR photodetectors that have been studied so far are produced by complex semiconductor fabrication processes and have low sensitivity at room temperature because of thermal noise. In addition, the low wavelength band of the SWIR photodetectors currently used has a detrimental effect on the human eye. To overcome these disadvantages, we propose a solution-processed PbS SWIR photodetector that can minimize harmful effects on the human eye. In this study, we synthesized PbS quantum dots (QDs) that have high absorbance peaked at 1410 nm and fabricated SWIR photodetectors with a conductive polymer, poly(3-hexylthiophene) (P3HT), using the synthesized PbS QDs. The characteristics of the synthesized PbS QDs and the current-voltage (I-V) characteristics of the fabricated PbS SWIR photodetectors were measured. It was found that the maximum responsivity of the optimized PbS SWIR photodetector with P3HT was 2.26 times that of the PbS SWIR photodetector without P3HT. Moreover, due to the high hole mobility and an appropriate highest occupied molecular orbital level of P3HT, the former showed a lower operating voltage.

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