Recent progress of heterostructure-based photoelectrodes in photoelectrochemical biosensing: a mini review

The Analyst ◽  
2020 ◽  
Vol 145 (4) ◽  
pp. 1121-1128 ◽  
Author(s):  
Bing Wang ◽  
Jun-Tao Cao ◽  
Yan-Ming Liu

The heterostructure photoelectrodes have witted the rapid development to improve the performance of PEC biosensors recently.

1953 ◽  
Vol 49 (3) ◽  
pp. 386-396 ◽  
Author(s):  
D. G. Northcott

The recent progress of modern algebra in analysing, from the algebraic standpoint, the foundations of algebraic geometry, has been marked by the rapid development of what may be called ‘analytic algebra’. By this we mean the topological theories of Noetherian rings that arise when one uses ideals to define neighbourhoods; this includes, for instance, the theory of power-series rings and of local rings. In the present paper some applications are made of this kind of algebra to some problems connected with the notion of a branch of a variety at a point.


2019 ◽  
Vol 53 (3) ◽  
pp. 23-29
Author(s):  
Chao Dong ◽  
Xue Li ◽  
Xin-xi Chen ◽  
Jiu-cai Jin ◽  
Cheng-yi Huang

AbstractBased on the ongoing techniques among control theory, communication networks, and sensor design, unmanned aerial vehicles (UAVs), unmanned undersea vehicles (UUVs) and unmanned surface vehicles (USVs) are experiencing rapid development. Research on these unmanned systems and those intelligent sectors inside has absorbed interests and investments from not only military but also civil organizations. The well-applied fields include surveillance and reconnaissance, surface warfare, antisubmarine warfare, mine countermeasures, oceanic environment monitoring, search and rescue, hydrographic survey, and so on. Comparing with those studies on UAVs and UUVs, the one focusing on USVs was started later and has been developed quickly in the past 20 years. Since 2013, USV has advanced considerably in China, particularly in the marine survey field. Owing to its characteristics of light-weighting, intelligence, and unmanned operations, USV is attractive for shallow water, extreme environments, and marine accidents. This paper comprehensively summarizes the recent progress of the marine survey USV in China. The structure of the paper is divided into three parts. First, we briefly recall the developing history and introduce several excellent USVs of China in recent years. The marine survey USVs invested by the State Oceanic Administration (SOA) are then summarized in the next section, along with the details of hydrographic survey in the South China Sea, Antarctic marine survey, and oil spill emergency response. Finally, the paper points out current deficiencies and future directions of the potential technique.


Synlett ◽  
2020 ◽  
Vol 31 (19) ◽  
pp. 1857-1861
Author(s):  
Hua Zhang ◽  
Li Wang

In recent decades, C–H borylation has undergone rapid development and has become one of the most important and efficient methods for the synthesis of organoboron compounds. Although transition-metal catalysis dominates C–H borylation, the metal-free approach has emerged as a promising alternative strategy. This article briefly summarizes the history of metal-free aromatic C–H borylation, including early reports on electrophilic C–H borylation and recent progress in metal-free catalytic intermolecular C–H borylation; it also highlights our recent work on BF3·Et2O-catalyzed C2–H borylation of hetarenes. Despite these recent advances, comprehensive mechanistic studies on various metal-free catalytic aromatic C–H borylations and novel processes with a wider substrate scope are eagerly expected in the near future.


1989 ◽  
Vol 161 ◽  
Author(s):  
Sorab K. Ghandhi

ABSTRACTThe last two years has seen rapid development in the growth of mercury cadmium telluride material for use in far infrared detectors. This paper will briefly review the progress before this period, and will focus on recent developments in these materials.The emphasis will be on the direct alloy growth of HgCdTe material by organometallic vapor phase epitaxy (OMVPE).


Author(s):  
Hei Chit Leo Tsui ◽  
Noel Healy

AbstractSemiconductor optoelectronic fiber technology has seen rapid development in recent years thanks to advancements in fabrication and post-processing techniques. Integrating the optical and electronic functionality of semiconductor materials into a fiber geometry has opened up many possibilities, such as in-fiber frequency generation, signal modulation, photodetection, and solar energy harvesting. This review provides an overview of the state-of-the-art in semiconductor optoelectronic fibers, including fabrication and post-processing methods, materials and their optical properties. The applications in nonlinear optics, optical-electrical conversion, lasers and multimaterial functional fibers will also be highlighted.


Synthesis ◽  
2019 ◽  
Vol 52 (04) ◽  
pp. 489-503 ◽  
Author(s):  
Yue Pang ◽  
Daniel Moser ◽  
Josep Cornella

Primary amino groups represent an ubiquitous category of functionalities in synthetic building blocks, drugs, and natural products. Therefore, such functionalities offer themselves as perfect handles for late-stage functionalization, and the development of robust and efficient strategies to transform these groups is highly desirable. Despite the extremely challenging activation of the C–N bond, the past few years have witnessed the rapid development of deaminative transformations using pyrylium salts as activating reagents. In most cases, the pyridinium salts formed were activated by single electron transfer, giving alkyl radicals which were used in a series of transformations via nickel and photoredox catalysis. This short review aims to give an overview to related properties of pyrylium salts, their historical significance, and summarize the recent progress in the field of deaminative transformations using these reagents.1 Introduction2 Pyrylium and Pyridinium Salts2.1 Historical Context2.2 Structure and Reactivity2.3 Pyrylium Synthesis2.4 Historical Context of the Reactivity of Pyridinium Salts3 Recent Progress on Deaminative Transformations of Primary Amino Groups by Pyrylium Salts3.1 Metal-Catalyzed Cross-Couplings3.2 Photoredox Catalysis and Photoinduced Reactions for C–C Bond Constructions3.3 Borylations3.4 SNAr Functionalization of Aminoheterocycles4 Conclusion


2007 ◽  
Vol 2 (9) ◽  
pp. 1934578X0700200
Author(s):  
Mohamed-Elamir F. Hegazy ◽  
Abou El-Hamd H. Mohamed ◽  
Mohamed H. Abd El-Razek ◽  
Fayza M. Hammouda ◽  
Nahed M. Hassan ◽  
...  

This review is written to take into account the rapid development in the taxonomy and phytochemistry of Chrysothamnus species. The article reviews the usage and biological activities of Chrysothamnus compounds, as well as recent progress regarding the use of this genus in clinical research.


Catalysts ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 350 ◽  
Author(s):  
Xiang-Ting Tang ◽  
Fan Yang ◽  
Ting-Ting Zhang ◽  
Yi-Fan Liu ◽  
Si-Yu Liu ◽  
...  

Recent rapid development in homogeneous gold catalysis affords an alternative and particularly thriving strategy for the generation of gold carbenes through gold-catalyzed oxidation/amination/cycloaddition of alkynes, while it avoids the employment of hazardous and potentially explosive diazo compounds as starting materials for carbene generation. In addition to facile and secure operation, gold carbenes generated in this strategy display good chemoselectivity distinct from other metal carbenes produced from the related diazo approach. N-heterocyclic carbene (NHC) gold is a special metal complex that can be used as ancillary ligands, which provides enhanced stability and can also act as an efficient chiral directing group. In this review, we will present an overview of these recent advances in alkyne oxidation/amination/cycloaddition by highlighting their specificity and applicability, aiming to facilitate progress in this very exciting area of research.


Author(s):  
William Gordon-Kamm ◽  
◽  
Pierluigi Barone ◽  
Sergei Svitashev ◽  
Jeffry D. Sander ◽  
...  

Despite the conspicuous and rapid development of genome editing tools, implementing this technology in plants often remains constrained by our inability to regenerate fertile genome-modified plants. Finding a viable combination of delivery method, genome editing reagents, and plant regeneration system has often been both crop-specific and crop-limited. Recent progress using morphogenic genes such as Wuschel2 (Wus2) and Babyboom (Bbm) has alleviated some of these crop-specific challenges, and along with other improvements, continues to expand the range of plants that can be edited.


2020 ◽  
Vol 8 ◽  
Author(s):  
Yang Liu ◽  
Xiuting Li ◽  
Jie Chen ◽  
Chonglin Yuan

Due to the rapid development of micro/nano manufacturing techniques and the greater understanding in electrochemical principles and methods, micro/nano electrode array sensing has received much attention in recent years, especially in bioanalysis. This review aims to explore recent progress in innovative techniques for the construction of micro/nano electrode array sensor and the unique applications of various types of micro/nano electrode array sensors in biochemical analysis. Moreover, the new area of smart sensing benefited from miniaturization of portable micro/nano electrode array sensors as well as wearable intelligent devices are further discussed.


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