Search results for: Yongqiang Zhang

Items from 1 to 20 out of 265 results

article

Radical‐Chain Hydrosilylation of Alkenes Enabled by Triplet Energy Transfer

Shixun Guo, Wei Wang, Yongqiang Zhang

Chemistry – A European Journal > 30 > 52 > n/a - n/a

Development of mild, robust and metal‐free catalytic approach for the hydrosilylation of alkenes is critical to the advancement of modern organosilicon chemistry given their powerful capacity in the construction of various C−Si bonds. Herein, we wish to disclose a visible light‐triggered organophotocatalytic strategy, which proceeds via a triplet energy transfer (EnT)‐enabled radical chain pathway...

article

Afterglow of Dual‐Confined Carbon Dots Ranging from Blue to Near‐Infrared

Wenxuan Sun, Yongqiang Zhang, Guangchao Yin, Siyu Lu

Advanced Functional Materials > 34 > 37 > n/a - n/a

Comprehensive research into afterglow emission in the near‐infrared (NIR) region of carbon dots (CDs) is currently lacking. In this study, highly efficient multicolor CDs are synthesized with fluorescence from blue to NIR using Rhodamine 6G. Boron oxide (B₂O₃) is employed as a matrix for encapsulating and confining the CDs, inhibiting triplet exciton quenching. Furthermore, structural rigidity is...

article

Functional diversity of neighbours mediates sap flow density and radial growth of focal trees, but in different ways between evergreen and deciduous broadleaved species

Yongqiang Zhang, Yun‐Hao Bai, Xia Chen, Yanpei Guo, more

Functional Ecology > 38 > 9 > 1931 - 1943

The functioning of a tree is shaped by the neighbouring species through the interspecific interaction and local environments. The functional trait composition of the neighbourhood could provide mechanistic insights into the effects of neighbours on the resource strategies of focal trees. In this study, we deployed an automated high‐frequency measurement of the sap flow density (SFD) and the radial...

article

P‐6.9: Research on the technologies of Dual Side Mix GOA to realize the narrow border on the Panel

Peirong HUO, Jingyi XU, Jianyun XIE, Xiongcan ZUO, more

SID Symposium Digest of Technical Papers > 55 > S1 > 1017 - 1020

In this paper, an asymmetric bilateral driving GOA model is proposed. The model is left‐right asymmetric and consists of a GOA output stabilization unit and a GOA output compensation unit. Respectively, which work together to drive and control a row of pixels. The stabilizing and compensating units alternate between left and right, and the two rows of pixels form a cycle, which we call DSMG (dual...

article

Synthesis of Diverse Oxetane Amino Acids via Visible‐Light‐Induced Photocatalytic Decarboxylative Giese‐Type Reaction

Haoliang Shi, Yi Wan, Yongqiang Zhang

Chinese Journal of Chemistry > 42 > 12 > 1341 - 1346

The divergent synthesis of versatile 3,3′‐disubstituted oxetane amino acids by utilizing visible‐light‐induced photocatalytic decarboxylative Giese‐type reaction has been demonstrated. 3‐Methyleneoxetane‐derived substrates are readily available in a single‐step and highly reactive as radical acceptors, allowing the production of versatile oxetane γ‐ and α‐amino acids in high yields. A distinct ring...

article

Combination of Oridonin and Chlorin e6 with the metal–organic frameworks MIL‐101‐NH₂‐AL for tumor chemo‐photodynamic therapy

Shilang Liao, Mengru Cai, Rongyue Zhu, Tingting Fu, more

Applied Organometallic Chemistry > 38 > 2 > n/a - n/a

In this paper, a metal–organic skeleton material MIL‐101‐NH₂‐AL was prepared for loading the chemotherapeutic drug Oridonin (Ori) and photosensitizer Chlorin e6 (Ce6). A drug delivery system for synergistic chemotherapy and photodynamic therapy was constructed. At the same time, we evaluated MIL‐101‐NH₂‐AL as a drug therapy carrier, including drug loading, cytotoxicity, and safety, verified the photodynamic...

article

Toward Kilogram‐Scale Preparation of Full‐Color Carbon Dots by Simply Stirring at Room Temperature in Air

Yuanjun Ma, Lilan Wu, Xueyan Ren, Yongqiang Zhang, more

Advanced Functional Materials > 33 > 50 > n/a - n/a

Large‐scale production of full‐color carbon dots (CDs) at room temperature under atmospheric pressure will promote their industrial application. Herein, o‐phenylenediamine is used as a single‐precursor carbon source and hydrogen peroxide as an oxidant. Kilogram‐scale CDs are obtained by stirring these reactants at room temperature in air for 30 min. After purification and acid treatment, blue‐, green‐,...

article

Lightweight and flexible hardware implementation of authenticated encryption algorithm SIMON‐Galois/Counter Mode

Xin Cheng, Yixuan Xu, Kefan Wang, Yongqiang Zhang, more

International Journal of Circuit Theory and Applications > 51 > 12 > 5951 - 5961

This brief proposes a new lightweight authenticated encryption algorithm SIMON‐GCM for Internet of Things (IoT) security, which realizes the combination of SIMON block cipher and Galois/Counter Mode (GCM). The designed SIMON circuit supports 128/192/256‐bit key size, which improves the flexibility and enlarges the range of applications. Moreover, the scheme of 32‐cycle Galois field (GF) multiplier...

article

Acid‐Triggered Aggregation of Carbon Dots Shifted Their Emission to Give Unexpected Deep‐Red Lasing

Ling Tang, Lin Ai, Ziqi Song, Laizhi Sui, more

Advanced Functional Materials > 33 > 34 > n/a - n/a

It is challenging to realize ultra‐pH‐responsive fluorescent carbon dots (CDs), especially reversibly adjustable multichromatic emission covering a broad wavelength range including deep‐red lasing. This study reports a one‐step solvothermal treatment of pyrogallol to obtain brilliant CDs with a substantial bathochromic shift (from blue to dark red emission) induced by pH changes. The CDs show an excellent...

article

Carbon Dots with Blue‐to‐Near‐Infrared Lasing for Colorful Speckle‐Free Laser Imaging and Dynamical Holographic Display

Yongqiang Zhang, Jinping Wang, Lu Wang, Rui Fu, more

Advanced Materials > 35 > 31 > n/a - n/a

As a new solution‐processable laser material, carbon dots (CDs) offer advantages of non‐toxicity, low‐cost, and high‐stability, which are conducive to the sustainable development of miniaturized lasers. Full‐color CDs (FC‐CDs) with bright‐blue, green, yellow, red, deep‐red, and near‐infrared (NIR) fluorescence are prepared. Their photoluminescence emission ranges from 431 to 714 nm. The FC‐CDs show...

article

Target identification and acaricidal activity difference of amitraz and its metabolite DPMF in Tetranychus cinnabarinus (Boisduval)

Ping Cai, Yuanyuan Zhang, Mu Yang, Chenghao Zhang, more

Pest Management Science > 79 > 9 > 3211 - 3217

BACKGROUND Amitraz is a broad‐spectrum formamidine acaricide proven to be effective against mites in all development stages. Under acidic conditions, amitraz is hydrolyzed to N²‐(2,4‐dimethylphenyl)‐N¹‐methyformamidine (DPMF), an active metabolite for mite control. Octopamine and tyramine receptors are well known targets of amitraz. Until now, no research has been conducted about the amitraz target...

article

High Performance of Liquid‐Gated Silicon Nanowire FETs Covered with Ultrathin Layers of Diamond‐Like Tetrahedral Amorphous Carbon

Nazarii Boichuk, Yurii Kutovyi, Denys Pustovyi, Yongqiang Zhang, more

physica status solidi (a) > 220 > 12 > n/a - n/a

Label‐free, low‐noise, and ultrahigh‐sensitive biosensors based on liquid‐gated silicon (Si) nanowire (NW) field‐effect transistors (FETs) have recently emerged as promising diagnostic tools that can be used for healthcare monitoring and point‐of‐care applications. However, the sensing capabilities and performance of such devices still critically depend on several factors, including the quality and...

article

Centralized Excited States and Fast Radiation Transitions Reduce Laser Threshold in Carbon Dots

Yongqiang Zhang, Lu Wang, Yongsheng Hu, Laizhi Sui, more

Small > 19 > 24 > n/a - n/a

As a new type of solution‐processed nano‐laser material, carbon dots (CDs) have shown considerable potential in optical communication, laser displays, micro/nano processing, and biomedicine. Reducing the laser threshold of the gain material is of considerable significance for further development of CDs’ applications in the field of micro/nano lasers. A series of blue‐emissive CDs (B‐CDs) are synthesized...

article

Centralized Excited States and Fast Radiation Transitions Reduce Laser Threshold in Carbon Dots (Small 24/2023)

Yongqiang Zhang, Lu Wang, Yongsheng Hu, Laizhi Sui, more

Small > 19 > 24 > n/a - n/a

Centralized Excited States The decrease in the laser threshold of blue‐emissive carbon dots (B‐CDs) is attributed to the increase in the radiation transition rate and centralized sp³‐related excited state levels, which are favorable for light amplification and population inversion. More details can be found in article number 2207983 by Siyu Lu and co‐workers.

article

Disulfide Crosslinking‐Induced Aggregation: Towards Solid‐State Fluorescent Carbon Dots with Vastly Different Emission Colors^†

Rui Fu, Haoqiang Song, Xingjiang Liu, Yongqiang Zhang, more

Chinese Journal of Chemistry > 41 > 9 > 1007 - 1014

Solid‐state fluorescent multi‐color carbon dots (SFM‐CDs), prepared using the same precursor(s) without the need for dispersion in a solid matrix, are highly demanded for a wide range of applications. Herein, we report a microwave‐assisted strategy for the preparation of SFM‐CDs with blue, yellow and red emissions within 5 min from the same precursors. The as‐prepared B‐CDs, Y‐CDs, and R‐CDs possessed...

article

Specific labeling and identification of bacteria based on concentration‐dependent carbon dot staining combined with hyperspectral imaging

Sifan Lin, Ze Ke, Mingwei Lu, Yanzhong Zhou, more

Journal of Biophotonics > 16 > 3 > n/a - n/a

Concentration‐dependent carbon dot (CD) fluorescence was developed and utilized alongside hyperspectral microscopy as a specific labeling and identification technique for bacteria. Staining revealed that the CD concentration within cells depended on the characteristic intracellular environment of the species. Therefore, based on the concentration dependence of the CD fluorescence, different bacterial...

article

Time series analysis for droughts characteristics response to propagation

Muhammad Abrar Faiz, Yongqiang Zhang, Xiaoqiang Tian, Xuanze Zhang, more

International Journal of Climatology > 43 > 3 > 1561 - 1575

Understanding and exploring hydrological (H) or soil moisture (SM) drought due to meteorological (M) drought under changing climate is crucial for drought early warning. Previously, different methods were used to calculate drought propagation from one state (M to another [H or SM]). However, each method has its pros and cons and thus cannot describe appropriate propagation attributes. In this study,...

article

The effectiveness of drugs combined with individualized management for elderly patients with stage III pressure ulcers

Rui Shao, TingTing Du, YongQiang Zhang, Yan Li, more

Journal of Cosmetic Dermatology > 21 > 11 > 5984 - 5989

Objective To explore the effect of drugs in combination with individualized management for elderly patients with stage III pressure ulcers. Methods Sixty patients with stage III pressure sores at our hospital from August 2017 to December 2019 were selected as research subjects. The patients were equally divided between the study group (n = 30) and the control group (n = 30) by the random number...

article

High‐accuracy mean circuits design by manipulating correlation for stochastic computing

Shaowei Wang, Guangjun Xie, Wenbing Xu, Xin Cheng, more

International Journal of Circuit Theory and Applications > 50 > 10 > 3692 - 3703

Stochastic computing (SC) encodes numerical values into probabilistic binary bitstreams to enable complex arithmetic operations to be transformed into simple bit operations. Different operations can be performed through the same SC element by adjusting the correlation between bitstreams. In this work, two stochastic mean circuits (MCs) are proposed by manipulating positively and negatively correlated...

article

An Efficient Modification at the Hole Transporting Layer/Electrode Interface for High‐Performance Ag‐Electrode‐Based Perovskite Solar Cells

Jingsong Sun, Yongqiang Zhang, Jiarui Wu, Qing Yang, more

physica status solidi (a) > 219 > 19 > n/a - n/a

Owing to the high power conversion efficiency (PCE) and the solution‐processed fabrication process, perovskite solar cells (PSCs) have attracted wide attention, while most high‐performance PSCs have an n‐i‐p (conventional) configuration that requires the expensive Au electrode. Silver is widely considered as one of the most promising candidates to replace gold as the top electrode material in conventional...

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INFONA - science communication portal

Search results for: Yongqiang Zhang

Radical‐Chain Hydrosilylation of Alkenes Enabled by Triplet Energy Transfer

Afterglow of Dual‐Confined Carbon Dots Ranging from Blue to Near‐Infrared

Functional diversity of neighbours mediates sap flow density and radial growth of focal trees, but in different ways between evergreen and deciduous broadleaved species

P‐6.9: Research on the technologies of Dual Side Mix GOA to realize the narrow border on the Panel

Synthesis of Diverse Oxetane Amino Acids via Visible‐Light‐Induced Photocatalytic Decarboxylative Giese‐Type Reaction

Combination of Oridonin and Chlorin e6 with the metal–organic frameworks MIL‐101‐NH₂‐AL for tumor chemo‐photodynamic therapy

Toward Kilogram‐Scale Preparation of Full‐Color Carbon Dots by Simply Stirring at Room Temperature in Air

Lightweight and flexible hardware implementation of authenticated encryption algorithm SIMON‐Galois/Counter Mode

Acid‐Triggered Aggregation of Carbon Dots Shifted Their Emission to Give Unexpected Deep‐Red Lasing

Carbon Dots with Blue‐to‐Near‐Infrared Lasing for Colorful Speckle‐Free Laser Imaging and Dynamical Holographic Display

Target identification and acaricidal activity difference of amitraz and its metabolite DPMF in Tetranychus cinnabarinus (Boisduval)

High Performance of Liquid‐Gated Silicon Nanowire FETs Covered with Ultrathin Layers of Diamond‐Like Tetrahedral Amorphous Carbon

Centralized Excited States and Fast Radiation Transitions Reduce Laser Threshold in Carbon Dots

Centralized Excited States and Fast Radiation Transitions Reduce Laser Threshold in Carbon Dots (Small 24/2023)

Disulfide Crosslinking‐Induced Aggregation: Towards Solid‐State Fluorescent Carbon Dots with Vastly Different Emission Colors^†

Specific labeling and identification of bacteria based on concentration‐dependent carbon dot staining combined with hyperspectral imaging

Time series analysis for droughts characteristics response to propagation

The effectiveness of drugs combined with individualized management for elderly patients with stage III pressure ulcers

High‐accuracy mean circuits design by manipulating correlation for stochastic computing

An Efficient Modification at the Hole Transporting Layer/Electrode Interface for High‐Performance Ag‐Electrode‐Based Perovskite Solar Cells

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