资源类型

期刊论文 58

会议视频 2

年份

2023 14

2022 10

2021 8

2020 4

2019 3

2018 1

2017 6

2016 3

2014 2

2011 1

2005 2

2004 3

2000 2

1999 1

展开 ︾

关键词

快子 3

超光速 3

相对论 2

量子力学 2

量子计算 2

DVD 1

QCA）；可逆逻辑；DG门；二进制减法器；量子成本 1

不经意传输；后量子；格公钥；带差错学习；通用可复合 1

中性原子量子计算 1

人工智能 1

人工智能；机器学习；一次性学习；一瞥学习；量子计算 1

位（势）垒 1

低压电器；协同装配；基于规划的人工势场；自适应量子遗传算法；动态交互 1

侧流免疫检测试纸条 1

信息速度 1

光电子 1

光量子计算 1

共振能量转移 1

冷原子绝对重力探测 1

展开 ︾

检索范围：

排序： 展示方式：

Improving hole transfer of boron nitride quantum dots modified PDI for efficient photodegradation

《化学科学与工程前沿（英文）》 2023年 第17卷 第11期   页码 1718-1727 doi: 10.1007/s11705-023-2319-7

摘要： In recent years, organic photocatalyst under visible-light absorption has shown significant potential for solving environmental problems. However, it is still a great challenge for constructing a highly active organic photocatalyst due to the low separation efficiency of photogenerated carriers. Herein, an effective and robust photocatalyst perylene-3,4,9,10-tetracarboxylic diamide/boron nitride quantum dots (PDI/BNQDs), consisting of self-assemble PDI with π–π stacking structure and BNQDs, has been constructed and researched under visible light irradiation. The PDI/BNQDs composite gradually increases organic pollutant photodegradation with the loading amount of BNQDs. With 10 mL of BNQDs solution added (PDI/BNQDs-10), the organic pollutant photodegradation performance reaches a maximum, about 6.16 times higher with methylene blue and 1.68 times higher with ciprofloxacin than that of pure PDI supramolecular. The enhancement is attributed to improved separation of photogenerated carriers from self-assembled PDI by BNQDs due to their preeminent ability to extract holes. This work is significant for the supplement of PDI supramolecular composite materials. We believe that this photocatalytic design is capable of expanding organic semiconductors’ potential for their applications in photocatalysis.

关键词： PDI     boron nitride     quantum dots     photocatalysis     hole transfer    

HTML PDF 收藏

Enhanced charge extraction for all-inorganic perovskite solar cells by graphene oxide quantum dots modified

《化学科学与工程前沿（英文）》 2023年 第17卷 第5期   页码 516-524 doi: 10.1007/s11705-022-2238-z

摘要： All-inorganic cesium lead bromide (CsPbBr3) perovskite solar cells have been attracting growing interest due to superior performance stability and low cost. However, low light absorbance and large charge recombination at TiO2/CsPbBr3 interface or within CsPbBr3 film still prevent further performance improvement. Herein, we report devices with high power conversion efficiency (9.16%) by introducing graphene oxide quantum dots (GOQDs) between TiO2 and perovskite layers. The recombination of interfacial radiation can be effectively restrained due to enhanced charge transfer capability. GOQDs with C-rich active sites can involve in crystallization and fill within the CsPbBr3 perovskite film as functional semiconductor additives. This work provides a promising strategy to optimize the crystallization process and boost charge extraction at the surface/interface optoelectronic properties of perovskites for high efficient and low-cost solar cells.

关键词： all inorganic     perovskite solar cells     graphene oxide quantum dots     high performance     stability    

HTML PDF 收藏

Design and mechanism insight on SiC quantum dots sensitized inverse opal TiO with superior photocatalytic

《化学科学与工程前沿（英文）》 2023年 第17卷 第12期   页码 1913-1924 doi: 10.1007/s11705-023-2350-8

摘要： The combination of SiC quantum dots sensitized inverse opal TiO2 photocatalyst is designed in this work and then applied in wastewater purification under simulated sunlight. From various spectroscopic techniques, it is found that electrons transfer directionally from SiC quantum dots to inverse opal TiO2, and the energy difference between their conduction/valence bands can reduce the recombination rate of photogenerated carriers and provide a pathway with low interfacial resistance for charge transfer inside the composite. As a result, a typical type-II mechanism is proved to dominate the photoinduced charge transfer process. Meanwhile, the composite achieves excellent photocatalytic performances (the highest apparent kinetic constant of 0.037 min–1), which is 6.2 times (0.006 min–1) and 2.1 times (0.018 min–1) of the bare inverse opal TiO2 and commercial P25 photocatalysts. Therefore, the stability and non-toxicity of SiC quantum dots sensitized inverse opal TiO2 composite enables it with great potential in practical photocatalytic applications.

关键词： inverse opal TiO2     silicon carbide quantum dots     quantum dot sensitized photocatalyst     type-II charge transfer route    

HTML PDF 收藏

Enhanced permeability and biofouling mitigation of forward osmosis membranes via grafting graphene quantumdots

《化学科学与工程前沿（英文）》 2023年 第17卷 第10期   页码 1470-1483 doi: 10.1007/s11705-023-2329-5

摘要： In this paper, graphene oxide quantum dots with amino groups (NH2-GOQDs) were tailored to the surface of a thin-film composite (TFC) membrane surface for optimizing forward osmosis (FO) membrane performance using the amide coupling reaction. The results jointly demonstrated hydrophilicity and surface roughness of the membrane enhanced after grafting NH2-GOQDs, leading to the optimized affinity and the contact area between the membrane and water molecules. Therefore, grafting of the membrane with a concentration of 100 ppm (TFC-100) exhibited excellent permeability performance (58.32 L·m–2·h–1) compared with TFC membrane (16.94 L·m–2·h–1). In the evaluation of static antibacterial properties of membranes, TFC-100 membrane destroyed the cell morphology of Escherichia coli (E. coli) and reduced the degree of bacterial adsorption. In the dynamic biofouling experiment, TFC-100 membrane showed a lower flux decline than TFC membrane. After the physical cleaning, the flux of TFC-100 membrane could recover to 96% of the initial flux, which was notably better than that of TFC membrane (63%). Additionally, the extended Derjaguin–Landau–Verwey–Overbeek analysis of the affinity between pollutants and membrane surface verified that NH2-GOQDs alleviates E. coli contamination of membrane. This work highlights the potential applications of NH2-GOQDs for optimizing permeability and biofouling mitigation of FO membranes.

关键词： forward osmosis membrane     graphene oxide quantum dots     graft modification     anti-fouling membrane     XDLVO theory    

HTML PDF 收藏

Glyco-functionalised quantum dots and their progress in cancer diagnosis and treatment

Jayshree Ashree, Qi Wang, Yimin Chao

《化学科学与工程前沿（英文）》 2020年 第14卷 第3期   页码 365-377 doi: 10.1007/s11705-019-1863-7

摘要： Despite all major breakthroughs in recent years of research, we are still unsuccessful to effectively diagnose and treat cancer that has express and metastasizes. Thus, the development of a novel approach for cancer detection and treatment is crucial. Recent progress in Glyconanotechnology has allowed the use of glycans and lectins as bio-functional molecules for many biological and biomedical applications. With the known advantages of quantum dots (QDs) and versatility of carbohydrates and lectins, Glyco-functionalised QD is a new prospect in constructing biomedical imaging platform for cancer behaviour study as well as treatment. In this review, we aim to describe the current utilisation of Glyco-functionalised QDs as well as their future prospective to interpret and confront cancer.

关键词： carbohydrate     leptin     glyco-functionalised QD     bioimaging     cancer diagnosis and treatment    

HTML PDF 收藏

Long-lasting photoluminescence quantum yield of cesium lead halide perovskite-type quantum dots

Yonghyun Kim, Huiwen Liu, Yi Liu, Boa Jin, Hao Zhang, Wenjing Tian, Chan Im

《化学科学与工程前沿（英文）》 2021年 第15卷 第1期   页码 187-197 doi: 10.1007/s11705-020-1931-z

摘要： Cesium lead halide perovskite (CsPbX , X= Cl, Br, I) quantum dots (QDs) and their partly Mn -substituted QDs (CsPb Mn X ) attract considerable attention owing to their unique photoluminescence (PL) efficiencies. The two types of QDs, having different PL decay dynamics, needed to be further investigated in a form of aggregates to understand their solid-state-induced exciton dynamics in conjunction with their behaviors upon degradation to achieve practical applications of those promising QDs. However, thus far, these QDs have not been sufficiently investigated to obtain deep insights related to the long-term stability of their PL properties as aggregated solid-states. Therefore, in this study, we comparatively examined CsPbX - and CsPb Mn X -type QDs stocked for>50 d under dark ambient conditions by using excitation wavelength-dependent PL quantum yield and time-resolved PL spectroscopy. These investigations were performed with powder samples in addition to solutions to determine the influence of the inter-QD interaction of the aged QD aggregates on their radiative decays. It turns out that the Mn -substituted QDs exhibited long-lasting PL quantum efficiencies, while the unsubstituted CsPbX -type QDs exhibited a drastic reduction of their PL efficiencies. And the obtained PL traces were clearly sensitive to the sample status. This is discussed with the possible interaction depending on the size and distance of the QD aggregates.

关键词： quantum dots     cesium lead halide perovskite     time-resolved photoluminescence     PL quantum yield     QD aggregates    

HTML PDF 收藏

Roles of glutathione and L-cysteine in the biomimetic green synthesis of CdSe quantum dots

Ling-Li Li, Yin-Hua Cui, Jie-Jie Chen, Han-Qing Yu

《环境科学与工程前沿（英文）》 2017年 第11卷 第6期 doi: 10.1007/s11783-017-0948-0

摘要： Biological synthesis of quantum dots (QDs) as an environmental-friendly and facile preparation method has attracted increasing interests. However, it is difficult to distinguish the roles of bio-thiols in QDs synthesis process because of the complex nature in organisms. In this work, the CdSe QDs synthesis conditions in organisms were reconstructed by using a simplified in vitro approach to uncover the roles of two small bio-thiols in the QDs formation. CdSe QDs were synthesized with glutathione (GSH) and L-cysteine (Cys) respectively. Compared with Cys at the same molar concentration, the CdSe QDs synthesized by GSH had a larger and broader particle size distribution with improved optical properties and crystal structure. Furthermore, quantum chemical calculations indicate that the stronger Cd2+ binding capacity of GSH contributed a lot to the CdSe QDs formation despite of the greater capability Cys for selenite reduction. This work clearly demonstrates the different roles of small thiols in the Cd2+ stabilization in the environment and biomimetic QDs synthesis process.

关键词： CdSe     Quantum dots (QDs)     Biomimetic synthesis     Bio-thiols     Glutathione (GSH)     Cysteine (Cys)    

HTML PDF 收藏

Water-dispersible nano-pollutions reshape microbial metabolism in type-specific manners: A metabolic and bacteriological investigation in

《环境科学与工程前沿（英文）》 2022年 第16卷 第9期 doi: 10.1007/s11783-022-1548-1

摘要：

• Water-dispersible nano-pollutions exhibit type-specific toxic effects on E. coli.

关键词： Nano-toxicity     Nano-plastics     Quantum dots     Microbial metabolite     Metabolic dysregulation    

HTML PDF 收藏

Organic conjugated polymers and polymer dots as photocatalysts for hydrogen production

《能源前沿（英文）》 2021年 第15卷 第1期   页码 667-677 doi: 10.1007/s11708-021-0767-7

摘要： Owing to the outstanding characteristics of tailorable electronic and optical properties, semiconducting polymers have attracted considerable attention in recent years. Among them, organic polymer dots process large breadth of potential synthetic diversity are the representative of photocatalysts for hydrogen production, which presents both an opportunity and a challenge. In this mini-review, first, the organic polymer photocatalysts were introduced. Then, recent reports on polymer dots which showed a superior photocatalytic activity and a robust stability under visible-light irradiation, for hydrogen production were summarized. Finally, challenges and outlook on using organic polymer dots-based photocatalysts from hydrogen production were discussed.

关键词： polymer dots (Pdots)     photocatalysis     hydrogen production    

HTML PDF 收藏

Carbon dots-based fluorescence sensor for two-photon imaging of pH in diabetic mice

《化学科学与工程前沿（英文）》 2023年 第17卷 第3期   页码 298-306 doi: 10.1007/s11705-022-2212-9

摘要： Herein, a reversible pH fluorescent sensor was developed using caffeic acid as the precursor by one-step solvothermal synthesis method. The carbon dots-based sensor (CA-CDs) exhibited pH-dependent increase in fluorescence intensity and showed linear relationship in the range of pH 6.60 and 8.00. Notably, the fluorescence sensor has a reversible response to pH change. Finally, the CA-CDs has been successfully applied for two-photon imaging of the pH in liver and kidney of diabetic mice. Imaging results showed that the pH value in kidney of diabetic mice was lower than that of the normal mice, while the pH value in liver of diabetic mice was almost the same as that of the normal mice. The present study provides a simple analytical method for pH detection suitable for in vivo.

关键词： carbon dots     two-photon imaging     pH     diabetic mice    

HTML PDF 收藏

氧化锆量子点用于非易失性电阻式随机存取存储器 Regular Papers

Xiang-lei HE, Rui-jie TANG, Feng YANG, Mayameen S. KADHIM, Jie-xin WANG, Yuan PU, Dan WANG

《信息与电子工程前沿（英文）》 2019年 第20卷 第12期   页码 1698-1705 doi: 10.1631/FITEE.1900363

摘要： 提出一种利用氧化锆量子点作为有源层的非易失性电阻式随机存取器。通过旋涂法制备Ag(上)/ZrO2(有源层)/Ti(下)典型的三明治结构存储器件。该优化器件具有较高高/低电阻差（约10 Ω），良好循环性能（循环数大于100），较低转化电流（约1 μA）。通过原子力显微镜和扫描电子显微镜观察ZrO2有源层表面形貌和堆积状态。实验结果表明，ZrO2有源层紧密堆积，且由于ZrO2量子点分布均匀，ZrO2有源层粗糙度较低（Ra=4.49 nm）。分析了Ag/ZrO2/Ti器件导电机理，并研究银离子导电丝和氧空位对电阻开关记忆行为的影响。该研究为忆阻器材料开发提供了一种简单方案。

关键词： 氧化锆量子点；电阻开关；存储器件；旋涂法    

HTML PDF 收藏

Lignin-derived dual-function red light carbon dots for hypochlorite detection and anti-counterfeiting

《化学科学与工程前沿（英文）》 2023年 第17卷 第7期   页码 966-975 doi: 10.1007/s11705-022-2244-1

摘要： The efficient utilization of natural lignin, which is the main by-product of the cellulose industry, is crucial for enhancing its economic value, alleviating the environmental burden, and improving ecological security. By taking advantage of the large sp2 hybrid domain of lignin and introducing amino functional groups, new lignin-derived carbon dots (SPN-CDs) with red fluorescence were successfully synthesized. Compared with green and blue fluorescent materials, red SPN-CDs have desirable anti-interference properties of short-wave background and exhibit superior luminescence stability. The SPN-CDs obtained exhibited sensitive and distinctive visible color with fluorescence-dual responses toward hypochlorite. Considering this feature, a portable, low-cost, and sensitive fluorescence sensing paper with a low limit of detection of 0.249 μmol∙L–1 was fabricated using the SPN-CDs for hypochlorite detection. Furthermore, a new type of visible-light and fluorescence dual-channel information encryption platform was constructed. Low-concentration hypochlorite can be employed as an accessible and efficient information encryption/decryption stimulus, as well as an information “eraser”, facilitating a safe and diversified transmission and convenient decryption of information. This work opens new avenues for high-value-added applications of lignin-based fluorescent materials.

关键词： alkali lignin     red light carbon dots     hypochlorite     encryption and anti-counterfeiting    

HTML PDF 收藏

Simplistic hydrothermal synthesis approach for fabricating photoluminescent carbon dots and its potential

《化学科学与工程前沿（英文）》 2023年 第17卷 第5期   页码 536-547 doi: 10.1007/s11705-022-2239-y

摘要： The past decade has witnessed a variety of members of the carbon family along with exposure of carbon dots due to their magnificent properties in sensing, bioimaging, catalytic applications, biomedical fields, and so on. Herein, we report the simple hydrothermal method to fabricate photoluminescent doped carbon quantum dots for the detection of noxious lead(II) ions. Lead(II) ion is very venomous for both the environment and human health for which its detection is demanded area in the research field. The as-prepared carbon dots show excellent photostability, low toxicity and significant photoluminescence properties along with good water solubility. Along with these properties, carbon dots have a quantum yield of approximately 15%. In the practical field of application, these carbon dots have been used as sensing probes for the detection of lead(II) ions with a detection limit of 60 nmol·L–1. The fluorescence intensity of carbon dots was remarkably quenched in the presence of the lead(II) ion selectively among all the tested metal ions. Furthermore, we have studied the Stern–Volmer relationship for lead(II) quenching along with the explanation of the probable quenching mechanism. Ability of the doped carbon dots in heavy metal ions sensing in an environmental sample was demonstrated.

关键词： carbon dots     fluorescence     heavy metal sensing     practical application     photoluminescence    

HTML PDF 收藏

量子密码协议研究现状与未来发展

张雪,高飞,秦素娟,张平

《中国工程科学》 2022年 第24卷 第4期   页码 145-155 doi: 10.15302/J-SSCAE-2022.04.015

摘要： Quantum secure direct communication and deterministic secure quantum communication [J].quantum information [J].Securing blockchain transactions using quantum teleportation and quantum digital signature [J].Quantum private query: A new kind of practical quantum cryptographic protocol [J].His major research fields include quantum cryptography and quantum algorithms.

关键词： 量子密码     协议     量子密钥分配     量子数字签名     量子保密查询    

HTML PDF 收藏

量子网络系统研究进展与关键技术分析

李静,高飞,秦素娟,温巧燕,张平

《中国工程科学》 2023年 第25卷 第6期   页码 80-95 doi: 10.15302/J-SSCAE-2023.06.010

摘要：

量子信息领域的迅速发展为现代信息技术带来了新的机遇与挑战，其中的热门研究方向之一即量子网络，旨在利用量子力学的基本特性实现长距离的（安全）通信任务，或通过分布式计算提供优于经典计算网络的计算能力，相关研究对推动量子信息的实用化具有重要意义。本文根据量子网络应用场景和技术手段的差异性，从量子密码网络、量子云计算网络、量子隐形传态网络3 个细分类别出发，全面梳理了国内外的研究进展及发展挑战，以便掌握量子网络系统的最新发展态势；结合量子网络的实施情况，阐述了量子网络系统发展中亟待攻克的链路建立、信息传输、网络协议、物理硬件等关键技术。综合来看，量子网络仍处于初级发展阶段，当前需积极应对挑战并把握机遇，以增强我国前沿领域的科技硬实力。研究建议，加强基础硬件设施研发投入、重视量子网络理论研究、加强交叉学科研究和相关人才培养，以促进我国量子网络系统的发展。

关键词： 量子信息；量子网络；量子密码网络；量子云计算网络；量子隐形传态网络    

HTML PDF 收藏

标题 作者 时间 类型 操作

Improving hole transfer of boron nitride quantum dots modified PDI for efficient photodegradation

期刊论文

Enhanced charge extraction for all-inorganic perovskite solar cells by graphene oxide quantum dots modified

期刊论文

Design and mechanism insight on SiC quantum dots sensitized inverse opal TiO with superior photocatalytic

期刊论文

Enhanced permeability and biofouling mitigation of forward osmosis membranes via grafting graphene quantumdots

期刊论文

Glyco-functionalised quantum dots and their progress in cancer diagnosis and treatment

Jayshree Ashree, Qi Wang, Yimin Chao

期刊论文

Long-lasting photoluminescence quantum yield of cesium lead halide perovskite-type quantum dots

Yonghyun Kim, Huiwen Liu, Yi Liu, Boa Jin, Hao Zhang, Wenjing Tian, Chan Im

期刊论文

Roles of glutathione and L-cysteine in the biomimetic green synthesis of CdSe quantum dots

Ling-Li Li, Yin-Hua Cui, Jie-Jie Chen, Han-Qing Yu

期刊论文

Water-dispersible nano-pollutions reshape microbial metabolism in type-specific manners: A metabolic and bacteriological investigation in

期刊论文

Organic conjugated polymers and polymer dots as photocatalysts for hydrogen production

期刊论文

Carbon dots-based fluorescence sensor for two-photon imaging of pH in diabetic mice

期刊论文

氧化锆量子点用于非易失性电阻式随机存取存储器

Xiang-lei HE, Rui-jie TANG, Feng YANG, Mayameen S. KADHIM, Jie-xin WANG, Yuan PU, Dan WANG

期刊论文

Lignin-derived dual-function red light carbon dots for hypochlorite detection and anti-counterfeiting

期刊论文

Simplistic hydrothermal synthesis approach for fabricating photoluminescent carbon dots and its potential

期刊论文

量子密码协议研究现状与未来发展

张雪,高飞,秦素娟,张平

期刊论文

量子网络系统研究进展与关键技术分析

李静,高飞,秦素娟,温巧燕,张平

期刊论文