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214篇 您的检索式:作者名="BoYang"
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1A mammalian fossil from the Dingqing Formation in the Lunpola Basin,northern Tibet,and its relevance to age and paleo-altimetry显示文摘The distal extremity of a rhinocerotid humerus from the upper part of the Dingqing Formation at the Lunbori locality in Baingoin County,northern Tibet,is the first mammalian fossil found in Cenozoic deposits of the Lunpola Basin.The medial condyle of the distal trochlea of the humerus specimen from Lunbori gradually contracts from medially to laterally.The margin of the medial surface of the medial condyle is not prominent,the well-developed medial epicondyle strongly extends posteriorly,and is divided from the articular facet of the medial condyle by a groove;all of which are characteristic for the Rhinocerotidae.The medial condyle is wide at the bottom and narrow at the top.The medial collateral ligament fossa is relatively shallow,and the medial collateral ligament tubercle is very weak.The medial part of the upper margin of the medial condyle smoothly connects to the bony surface above,but there is no clear boundary between them.All of these characteristics are identical with those of Plesiaceratherium.These comparisons imply that the Lunbori specimen is closest to Plesiaceratherium gracile in the Shanwang Fauna from Linqu,Shandong Province,in size and morphology.Thus,its age is suggested to be the late Early Miocene(Shanwangian Age),about 18-16 Ma.Discovery of the rhinocerotid fossil suggests that the upper part of the Dingqing Formation deposited in the Neogene.While adjusting to paleo-temperatures of the Early Miocene,a paleo-ecosystem reconstruction indicates that the paleo-elevation was close to 3000 m in the Lunpola Basin during this time.DENG Tao WANG ShiQi XIE GuangPu LI Qiang HOU SuKuan SUN BoYang 2012Chinese Science Bulletin2012,57,2:30
2Metal–Organic Framework-Based Sensors for Environmental Contaminant Sensing显示文摘Increasing demand for timely and accurate environmental pollution monitoring and control requires new sensing techniques with outstanding performance, i.e.,high sensitivity, high selectivity, and reliability. Metal–organic frameworks(MOFs), also known as porous coordination polymers, are a fascinating class of highly ordered crystalline coordination polymers formed by the coordination of metal ions/clusters and organic bridging linkers/ligands. Owing to their unique structures and properties,i.e., high surface area, tailorable pore size, high density of active sites, and high catalytic activity, various MOF-based sensing platforms have been reported for environmental contaminant detection including anions, heavy metal ions,organic compounds, and gases. In this review, recent progress in MOF-based environmental sensors is introduced with a focus on optical, electrochemical, and field-effect transistor sensors. The sensors have shown unique and promising performance in water and gas contaminant sensing. Moreover, by incorporation with other functional materials, MOF-based composites can greatly improve the sensor performance. The current limitations and future directions of MOF-based sensors are also discussed.Xian Fang Boyang Zong Shun Mao 2018Nano-Micro Letters2018,10,4:18
3INSULIN RESISTANCE AND CAROTID ATHEROSCLEROSIS IN 221 PATIENTS WITH POTENTIAL HYPERGLYCEMIA显示文摘Objective To investigate the relationship between insulin resistance and carotid atherosclerosis in patients with potential hyperglycemia. Methods A total of 221 patients were recruited among those with potential hyperglycemia. All participants underwent physical examination, medical history interview, and 75 g oral glucose tolerance test. Venous blood was sampled for measurement of insulin and cholesterol levels. The intima-media thickness (IMT) in bilateral common carotid arteries was observed by B-mode ultrasound. Insulin resistance index was calculated by homeostasis model assessment (HOMA-IR). Subjects were stratified in quintiles according to HOMA-IR values. Risk factors and atherosclerotic parameters were analyzed. Results With HOMA-IR value increase, incidence of impaired glucose tolerance, diabetes mellitus, hypertension, and coronary artery disease increased, the levels of triglyceride (TG), low density lipoprotein cholesterol (LDL-C), fasting plasma glucose, 2 hour plasma glucose, and fasting insulin increased as well, while the level of high density lipoprotein cholesterol (HDL-C) decreased. Meanwhile, all atherosclerotic parameters increased. Multivariate regression analysis showed that TG, total cholesterol, HDL-C, LDL-C levels, and ln(HOMA-IR) were related to IMT, hence were risk factors for IMT increase. Conclusion Insulin resistance is implicated in atherogenesis.BoYang Tian-deLi Jin-songWang GuangZhi Wen-shengJin YongXu 2005Chinese Medical Sciences Journal2005,20,2:14
4Measurement and Spatio-temporal Distribution of Urbanization Development Quality of Urban Agglomeration in China显示文摘Urbanization development quality(UDQ) of urban agglomeration(UA) is one of the important indexes to evaluate if the UA urbanization speed is reasonable,if the population urbanization process is sound,if the economic urbanization process is efficient,if the social urbanization process is harmonious and fair,which is generally composed of three parts,including economic urbanization development quality,social urbanization development quality and spa-tial urbanization security quality.With the research of evolution rules of UDQ,through the analysis on the interactive coordination relation between UDQ and urbanization level,the paper proposes three dimensional index ball and stan-dard value of comprehensive measures of UDQ,which is composed of three categories of indexes.By introducing At-kinson model,this paper constructs the sub-element measure model and segmental measure model of UDQ,and fur-ther makes an overall evaluation on the characteristic of UDQ of UAs in China.Results show that:1) UDQ of UAs lied at optimization and upgrading phase during 1995-2008 and the quality was low.Population urbanization level did not reflect the UDQ of UAs;2) the improving speed of the spatial urbanization security quality was higher than the so-cial urbanization development quality,and the improving speed of economic urbanization development quality was the lowest;3) the coordination between UDQ and urbanization level was not so good;4) there was a weak correlation re-lation between UDQ and UA scale,and it was not true that the bigger the UA was,the better the UDQ was.WANG Deli FANG Chuanglin GAO Boyang HUANG Jinchuan YANG Qingshan 2011Chinese Geographical Science2011,21,6:13
5A carbon-based 3D current collector with surface protection for Li metal anode显示文摘因为它为这类房间展出最高特定的能力和最低氧化还原作用潜力,锂金属为 Li-ion-based 电池被认为理想的阳极材料。然而,李树突,不稳定的稳固的电解质分裂期间,低 Coulombic 效率,和安全危险的生长显著地妨碍了金属性的李阳极的实际申请。此处,我们求婚一三维(3D ) 碳 nanotube 海绵(CNTS ) 作为一位李免职主人。CNTS 的高特定的表面区域为李成核启用同质的费用分发并且最小化有效当前的密度克服树突生长。另外的保角的艾尔 2 由原子层免职(ALD ) 涂的 CNTS 上的 O 3 层要用体力地由于好化学稳定性和层的高机械力量保护李金属电极 / 电解质接口。Li@ALD-CNTS 电极展出稳定的电压侧面,小过电位在在 1.0 妈骑车的 100 h 上从 16 ~ 30Ying Zhang Boyang Liu Emily Hitz Wei Luo Yonggang Yao Yiju Li diaqi Dai Chaoji Chen Yanbin Wang Chunpeng Yang Hongbian Li Liangbing Hu 2017Nano Research2017,10,4:11
6Numerical simulation on the risk of roof water inrush in Wuyang Coal Mine显示文摘Water-inrush in mine is one of the mine disasters caused by mining.In order to assess the risk of roof water-inrush in Wuyang Coal Mine based on the geological material of the coal mine,we built numerical models for the roof fracture and seepage development rule by using RFPA2D and COMSOL respectively,to analyze the changes in fracture zone,stress,water pressure and seepage vector with the advancement of working face,and compared the results with the field investigated data.The numerical simulation results indicate that:(1) with the advancement of the working faces,the stress relief range and fracture zone in the overlying strata increased rapidly up to about 90 m,and then tended to remain constant,reaching a final height of about 95 m which agrees with the field investigation;(2) the seepage flow constantly increased with a larger flow volume both in the front and rear area,where the stress concentration are the most serious.Yao Banghua Bai Haibo Zhang Boyang 2012International Journal of Mining Science and Technology2012,22,2:11
7A comparative study of MEA and DEA for post-combustion CO2 capture with different process configurations显示文摘Boyang Xue Yanmei Yu Jian Chen Xiaobo Luo Meihong Wang 2017International Journal of Coal Science & Technology2017,4,1:11
8Advanced rechargeable lithium-ion batteries based on bendable ZnCo2O4-urchins-on-carbon-fibers electrodes显示文摘ZnCo2O4-urchins-on-carbon-fibers 矩阵的一个新奇的班被设计了,描绘,并且过去常制作高效的精力存储设备。我们获得了 1180 妈数慲畴敲 ?L 癯 ? ㈱? 的一个可逆的锂存储能力 ?? 牣慥楳杮倠 ? 挠湯整瑮 ?? 桳牯 ? 整浲 ??? 琠敨浲污琠敲瑡敭瑮 ? 瑡 ??? 鲖 ? 栀氠睯牥愠摮甠灰牥焠慵瑮汩獥映牯搠楡祬洠湩浩浵琠浥数爔?爔 吗??Bin Liu Xianfu Wang Boyang Liu Qiufan Wang Dongsheng Tan Weifeng Song Xiaojuan Hou Di Chen Guozhen Shen 2013Nano Research2013,6,7:10
9Hydrogen peroxide primes heart regeneration with a derepression mechanism显示文摘当成年的人的心很限制了再生潜力时,成年 zebrafish 心能充分在 20% 室的切除术以后再生。尽管以前的报告建议象 FGF 和 PDGF 那样的发展发信号小径在成年的心新生被再使用,内在的细胞内部的机制仍然保持大部分未知。这里,我们显示出那 H 2 O 2 充当新奇 epicardial 和心肌的信号在成年 zebrafish 为新生告知心。未经触动的心的实时成像揭示了高度局部性的 H 2 O 2(~ 30 μ M ) 在在切除术地点的心外膜和邻近的紧缩的心肌层的生产。减少的 H 2有 Duox 禁止者 diphenyleneiodonium (点每英寸)或 apocynin 的 O 2形成,或清除 H 2当时,由过氧化氢酶 overexpression 的 O 2显著地损害了心脏的新生外长的 H 2 O 2在心脏的新生上救了点每英寸的禁止的效果,显示那 H 2 O 2是在这个过程的一个必要、足够的信号。机械学地,提高了 H 2 O 2 使动摇氧化还原作用敏感的磷酸酶 Dusp6 并且因此增加了 Erk1/2 的 phosphorylation。当 dusp6 的转基因的 overexpression 损害了心脏的新生时, Dusp6 禁止者 BCI 完成了类似的支持 regenerative 效果。H 2 O 2 在招募起一个双作用通过二条相对独立的小径的有免疫力的房间和支持的心新生。我们结束那 H 2 潜在地从 Duox/Nox2 产生的 O 2 由解开通过包含 Dusp6 的 derepression 机制发信号的地图 kinase 在 zebrafish 支持心新生。Peidong Han Xiao-Hai Zhou Nannan Chang Cheng-Lu Xiao Shouyu Yah He Ren Xin-Zhuang Yang Mei-Ling Zhang Qing Wu Boyang Tang Ju-Peng Diao Xiaojun Zhu Chuanmao Zhang Chuan-Yun Li Heping Cheng Jing-Wei Xiong 2014Cell Research2014,24,9:10
10Experimental study on the flow behaviour of water-sand mixtures in fractured rock specimens显示文摘The study of flow behaviour of water-sand mixtures in fractured rocks is of great necessity to understand the producing mechanism and prevention of water inrush and sand gushing accidents.A self-developed seepage test system is used in this paper to conduct laboratory experiments in order to study the influence of the particle size distribution,the void ratio,and the initial mass of Aeolian sand on the flow behavior.It is concluded that the water flow velocity is insensitive to the initial mass of the Aeolian sand but increases with the power exponent in the Talbot formula and the specimen height.The outflow of the Aeolian sand increases with the power exponent in the Talbot formula,the specimen height,and the initial mass of the Aeolian sand.Besides,the outflow of the Aeolian sand changes exponentially with the water flow velocity.Finally,it is found that the fractured specimen has a maximum sand filtration capacity beyond which the outflow of the Aeolian sand significantly increases with the initial mass of the Aeolian sand.Boyang Zhang Qingyuan He Zhibin Lin Zhenhua Li 2021International Journal of Mining Science and Technology2021,31,3:9
11Near-infrared emissive carbon dots with 33.96% emission in aqueous solution for cellular sensing and light-emitting diodes显示文摘Near-infrared emissive carbon dots(CDs) were synthesized by hydrothermal method. The as-prepared CDs exhibited a relatively high quantum yield(QY) of 33.96% in an aqueous solution, and the peak toward the near-infrared fluorescence reached 685 nm. The CDs exhibited pH-sensitive characteristics under strong acidic conditions. Even at pH = 0, the as-prepared CDs retained a high fluorescence intensity,which proved that they possessed good acid resistance. More importantly, the CDs were sensitive to the Fe3+changes in living cells. In addition, they could also be used for white and red emissive LEDs.This discovery will expand the use of aqueous-phase high QY CDs in the field of living cell sensing and imaging.Boyang Wang Jian Li Zhiyong Tang Bai Yang Siyu Lu 2019Science Bulletin2019,64,17:9
12Prognostic value of programmed death.1, programmed death-ligand 1, programmed death-ligand 2 expression, and CD8(+) T cell density in primary tumors and metastatic lymph nodes from patients with stage T1.4N+M0 gastric adenocarcinoma显示文摘Background: Anti-programmed death-1/programmed death-ligand 1(PD-1/PD-L1) immunotherapy has been proved to be effective on gastric cancer in ongoing clinical trials. However, the value of PD-L1 in predicting responses of patients with gastric cancer to anti-PD-1/PD-L1 immunotherapy is controversial. Some studies suggested that intra-and inter-tumoral heterogeneity of PD-L1 expression might explain the controversy.This study aimed to analyze the expression of PD-L1, PD-L2, and PD-1 as well as CD8(+) T-cell density in primary tumors and lymph nodes from patients with stage T1-4 N+M0 gastric adenocarcinoma to explore the heterogeneity of PD-1 signaling pathway molecules.Methods: In primary tumors and metastatic as well as non-metastatic lymph nodes from patients with stage T1-4 N+M0 gastric adenocarcinoma, we detected PD-L1 and PD-L2 expression with immunohistochemistry. CD8(+)T-cell density in primary tumors and PD-1 expression on CD8(+)T cells were detected with immunofluorescence. Univariate analysis was used to determine the prognostic values of them. Cox proportional hazard regression model was used to identify independent risk factors that affect patients' overall survival and disease-free survival.Results: Among 119 eligible patients who had undergone surgical resection, the positive rate of PD-L1 was higher in metastatic lymph nodes than in primary tumors(45.4% vs. 38.7%, P = 0.005); the positive rate of PD-1 on CD8(+)T cells was significantly higher in primary tumors and metastatic lymph nodes than in tumor-free lymph nodes(both P < 0.001). The intensity of PD-1 expression on CD8(+) T cells in primary tumors and in metastatic lymph nodes were stronger than that in tumor-free lymph nodes from the same patient. Beside, the positive rate of PD-L2 did not show any differences between primary tumors and metastatic lymph nodes. In multivariate analysis, PD-L1 expression,PD-L2 expression, a low density of CD8(+) T cells in primary tumors, and PD-1 expression on CD8(+) T cells in primary tumors were associated with poor prognosis.Conclusion: The expression of PD-L1 is heterogeneous in primary tumors and in metastatic lymph nodes from patients with stageT1-4 N+M0 gastric adenocarcinoma, which might explain the inconsistent results in assessing the prognostic value of PD-L1 expression in previous studies.Yuan Gao Su Li Dazhi Xu Shangxiang Chen Yuchen Cai Wenqi Jiang Xinke Zhang Jin Sun Kefeng Wang Boyang Chang Fenghua Wang Minghuang Hong 2017Chinese Journal of Cancer2017,36,11:8
13Antitumor effects of the molecule-downsized immunocon-jugate composed of lidamycin and Fab' fragment of monoclonal antibody directed against type IV collagenase显示文摘Type IV collagenase plays an important role in tumor invasion and metastasis through cleaving type IV collagen in the basement membrane and extracellular matrix. In this study a molecule-downsized immunoconjugate (Fab′-LDM) was constructed by linking lidamycin (LDM), a highly potent antitumor antibiotic, to the Fab′ fragment of a monoclonal antibody directed against type IV collagenase and its antitumor effect was investigated. As assayed in 10% SDS-PAGE gel, the molecular weight of Fab′-LDM conjugate was 65 kD with a 1:1 molecular ratio of Fab′ and LDM. The Fab′-LDM conjugate maintained most part of the immunoreactivity of Fab′ fragment to both type IV collagense and mouse hepatoma 22 cells by ELISA. By MTT assay, Fab′-LDM conjugate showed more potent cytotoxicity to hepatoma 22 cells than that of LDM. Administered intravenously, Fab′-LDM conjugate proved to be more effective against the growth of subcutaneously transplanted hepatoma 22 in mice than free LDM in two experiment settings. In Experiment I, the drugs were given intravenously on day 1 and day 8. Fab′-LDM at the doses of 0.025 mg/kg, 0.05 mg/kg and 0.1 mg/kg inhibited tumor growth by 76.7%, 93.3% and 94.8%, while free LDM at 0.05 mg/kg inhibited tumor growth by 76.1%, respectively. In experiment II, the drugs were given intravenously on day 4 and day 11, Fab′-LDM at the doses of 0.025 mg/kg and 0.05 mg/kg inhibited tumor growth by 74.2%, 80.9%, while free LDM at 0.05 mg/kg inhibited tumor growth by 60.5%, respectively. In terms of survival time, Fab′-LDM was more effective than free LDM. The results suggest that the molecule-downsized immunoconjugate directed against type IV collagenase is of high efficacy in experimental cancer therapy.WANG Fengqiang SHANG Boyang ZHEN Yongsu 2004Science China(Life Sciences)2004,47,1:7
14Kilogram-scale synthesis of carbon quantum dots for hydrogen evolution, sensing and bioimaging显示文摘The development of large-scale synthetic methods for high quality carbon quantum dots(CQDs) is fundamental to their applications.However,the macroscopic preparation and scale up synthetic of CQDs is still in its infancy.Here,we report a facile,green,kilogram-scale synthesis of high quality fluorescent CQDs derived from poplar leaves via a one-step hydrothermal method.Notably,the throughput of CQDs can reach a level up to as high as 1.4975 kg in one pot.The structure and properties of the as-prepared CQDs were assessed through TEM,XRD,XPS and various spectroscopic methods.The obtained high quality CQD s with a photoluminescent quantum yield of 10.64% showed remarkable stability in aqueous media,rich functional groups,high photostability,consistent photoluminescence within biological pH range and low cytotoxicity.On account of these good properties,we demonstrated the multifunctional application to electrocatalytic water splitting,Fe^3+ sensing and bioimaging.It showed remarkable electrocatalytic activity,Fe^3+ sensitivity and good biocompatibility.This study provides a green,facile,inexpensive and large-scale method for producing high quality CQDs,which provides application value for large-scale production of CQDs.Weidong Li Yuan Liu Boyang Wang Haoqiang Song Zhongyi Liu Siyu Lu Bai Yang 2019Chinese Chemical Letters2019,30,12:7
15Interface electron collaborative migration of Co–Co3O4/carbon dots:Boosting the hydrolytic dehydrogenation of ammonia borane显示文摘Ammonia borane(AB)is an excellent candidate for the chemical storage of hydrogen.However,its practical utilization for hydrogen production is hindered by the need for expensive noble-metal-based catalysts.Herein,we report Co-Co3O4 nanoparticles(NPs)facilely deposited on carbon dots(CDs)as a highly efficient,robust,and noble-metal-free catalyst for the hydrolysis of AB.The incorporation of the multiinterfaces between Co,Co3O4 NPs,and CDs endows this hybrid material with excellent catalytic activity(rB=6816 mLH2 min^-1 gCo^-1)exceeding that of previous non-noble-metal NP systems and even that of some noble-metal NP systems.A further mechanistic study suggests that these interfacial interactions can affect the electronic structures of interfacial atoms and provide abundant adsorption sites for AB and water molecules,resulting in a low energy barrier for the activation of reactive molecules and thus substantial improvement of the catalytic rate.Han Wu Min Wu Boyang Wang Xue Yong Yushan Liu Baojun Li Baozhong Liu Siyu Lu 2020Journal of Energy Chemistry2020,29,9:7
16Analysis of a Water-Inrush Disaster Caused by Coal Seam Subsidence Karst Collapse Column under the Action of Multi-Field Coupling in Taoyuan Coal Mine显示文摘Minin-induced water inrush from a confined aquifer due to subsided floor karst collapse column(SKCC)is a type of serious disaster in the underground coal extraction.Karst collapse column(KCC)developed in a confined aquifer occurs widely throughout northern China.A water inrush disaster from SKCC occurred in Taoyuan coal mine on February 3,2013.In order to analyze the effect of the KCC influence zone’s(KCCIZ)width and the entry driving distance of the water inrush through the fractured channels of the SKCC,the stress,seepage,and impact dynamics coupling equations were used tomodel the seepage rule,and a numerical FLAC3D model was created to determine the plastic zones,the vertical displacement development of the rockmass surrounding the entry driving working face(EDWF),and the seepage vector and water inflow development of the seepage field.The hysteretic mechanism of water inrush due to SKCC in Taoyuan coal mine was investigated.The results indicate that a water inrush disaster will occur when the width of the KCCIZ exceeds 16 m under a driving,which leads to the aquifer connecting with the fractured zones of the entry floor.Hysteretic water inrush disasters are related to the stress release rate of the surrounding rocks under the entry driving.When the entry driving exceeds about 10 m from the water inrush point,the stress release rate reaches about 100%,and a water inrush disaster occurs.Zhibin Lin Boyang Zhang Jiaqi Guo 2021Computer Modeling in Engineering & Sciences2021,,1:6
17Garnet/polymer hybrid ion-conducting protective layer for stable lithium metal anode显示文摘Chunpeng Yang Boyang Liu Feng Jiang Ying Zhang Hua Xie Emily Hitz Liangbing Hu 2017Nano Research2017,10,12:6
18Millisecond synthesis of CoS nanopartides for highly efficient overall water splitting显示文摘High performance and low-cost electrocatalysts for overall water splitting,i.e.,catalyzing hydrogen and oxygen evolution reactions with the same material,are of great importance for large-scale,renewable energy conversion processes.Here,we report an ultrafast(~7 ms)synthesis tech nique for tran sition metal chalcoge nide n anoparticles assisted by high temperature treatme nt.As a proof of con cept,we dem on strate that cobalt sulfide(~20 nm in diameter)@few-layer graphe ne(~2 nm in thick ness)core-shell nan oparticles embedded in RGO nano sheets exhibit remarkable bifunctional electrocatalytic activity and stability for overall water splitting,which is comparable to commercial 40 wt.%platinum/carbon(Pt/C)electrocatalysts.After 60 h of continuous operation,10 mA crrT?water splitting current density can still be achieved at a low potential of^1.77 V without any activity decay,which is among the most active for non-noble material based electrocatalysts.The presented study provides prospects in synthesizing highly efficient bifunctional electrocatalysts for large-scale energy conversion application via a simple yet efficient technique.Yanan Chen Shaomao Xu Shuze Zhu Rohit Jiji Jacob Glenn Pastel Yanbin Wang Yiju Li Jiaqi Dai Fengjuan Chen Hua Xie Boyang Liu Yonggang Yao Lourdes G. Salamanca-Riba Michael R. Zachariah Teng Li Liangbing Hu 2019Nano Research2019,12,9:6
19High production-yield solid-state carbon dots with tunable photoluminescence for white/multi-color light-emitting diodes显示文摘Plastic waste is generally resistant to natural degradation and has become a major environmental pollution problem globally. The pollution of ecosystems seriously affects the health and survival of organisms,including humans. Much attention has been paid to finding suitable ways to convert plastic waste into high-value-added carbon materials. To this end, we report the high production yield(60%–85%) of carbon dots(CDs) for solid-state fluorescence(SSF) obtained by a one-step solvothermal method using waste expanded polystyrene as the precursor. The SSF mechanism of the CDs was also explored. Their emission wavelength, with a large full width at half maximum of 150–200 nm, exhibited tunable photoluminescence from white to yellow and orange. CDs powder was used to fabricate single-component white and multi-colour light-emitting diodes on UV chips. Overall, plastic waste was converted into tunable solid-state fluorescent CDs powder, which has promising applications in carbon-based lighting, by a simple solvothermal method that provides a viable method for recycling plastic waste.Haoqiang Song Xuejian Liu Boyang Wang Zhiyong Tang Siyu Lu 2019Science Bulletin2019,64,23:6
20Ethanol-derived white emissive carbon dots:The formation process investigation and multi-color/white LEDs preparation显示文摘Carbon dots(CDs)have attracted much attention due to their excellent photoelectric properties and potential applications.Although previous studies have shown that almost all organic molecules can be converted into CDs via chemical carbonization,the mechanism of the conversion process remains unclear.The hydrothermal/solvothermal method commonly used to prepare CDs is complicated and leads to the generation of many by-product CDs with similar structures.Considering that the purification of the synthesized by-products is difficult,the process of CDs formation cannot be readily analyzed and understood.Herein,we use ethanol as a carbon source to synthesize white-emitting CDs(W-CDs).Column chromatography separation shows that the synthesized W-CDs are composed of blue-,cyan-,and yellow-emitting CDs that fluoresce at wavelengths corresponding to the three emission centers of W-CDs.Although the samples have similar graphitic structure,they exhibit different surface states due to variations in the degree of oxidation and carbonization.Therefore,the red-shift in their emission peaks is attributed to an increased degree of carbonization in their polymer structure.Theoretical calculations verify the experimental results,and the prepared CDs are successfully used to develop multi-color and white light-emitting diodes(LEDs).Boyang Wang Haoqiang Song Zhiyong Tang Bai Yang Siyu Lu 2022Nano Research2022,15,2:5
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