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Microwave-Assisted Confining Growth and Liquid Exfoliation of sp^(3)-Hybrid Carbon Nitride Nano/Micro-Crystals

Energy & Environmental Materials 2024年第6期7卷 399-408页

作者： Chenglong Shen Qing Lou Kaikai Liu Guangsong Zheng Runwei Song Jinhao Zang xigui yang Xing Li Lin Dong Chongxin Shan Henan Key Laboratory of Diamond Optoelectronic Materials and Devices Key Laboratory of Material PhysicsMinistry of EducationSchool of Physics and Laboratory of Zhongyuan LightZhengzhou UniversityZhengzhou 450052China

As one promising carbon-based material,sp^(3)-hybrid carbon nitride has been predicted with various novel physicochemical ***,the synthesis of sp^(3)-hybrid carbon nitride is still limited by the nanaoscale,low crystallinity,complex source,and expensive ***,we have presented a facile approach to the sp^(3)-hybrid carbon nitride nano/micro-crystals with microwave-assisted confining growth and liquid ***,the carbon nitride nano/micro-crystals can spontaneously emerge and grow in the microwave-assisted polymerization of citric acid and urea,and the liquid exfoliation can break the bulk disorder polymer to retrieve the highly crystalline carbon nitride nano/*** obtained carbon nitride nano/micro-crystals present superior blue light absorption strength and surprising photoluminescence quantum yields of 57.96%in ethanol and 18.05%in solid *** experimental characterizations and density functional theory calculations reveal that the interface-trapped localized exciton may contribute to the excellent intrinsic light emission capability of carbon nitride nano/micro-crystals and the interparticle staggered stacking will prevent the aggregation-caused-quenching ***,the carbon nitride nano/micro-crystals are demonstrated to be potentially useful as the phosphor medium in light-emitting-diode for interrupting blue light-induced eye *** work paves new light on the synthesis strategy of sp^(3)-hybrid carbon nitride materials and thus may push forward the development of multiple carbon nitride research.

关键词： confining growth density functional theory liquid exfoliation luminescence sp^(3)-hybrid carbon nitride

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Highly sensitive humidity sensors based on hexagonal boron nitride nanosheets for contactless sensing

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Nano Research 2023年第7期16卷 10279-10286页

作者： Hang Liu Jinxu Qin xigui yang Chaofan Lv Wentao Huang Fukui Li Chuang Zhang Yanran Wu Lin Dong Chongxin Shan Henan Key Laboratory of Diamond Optoelectronic Materials and Devices Key Laboratory of Materials PhysicsMinistry of EducationSchool of Physics&MicroelectronicsZhengzhou UniversityZhengzhou 450052China Institute of Quantum materials and Physics Henan Academy of SciencesZhengzhou 450046China

Humidity sensors with high sensitivity,rapid response,and facile fabrication process for contactless sensing applications have received considerable attention in recent ***,humidity sensors based on hexagonal boron nitride(h-BN)nanosheets that are synthesized by a facile ultrasonic process have been fabricated,which display an ultrahigh sensitivity of 28,384%at 85%relative humidity(RH),rapid response/recovery time(3.0/5.5 s),and long-term stability in a wide humidity detection range(11%-85%RH),superior to most of the reported humidity *** high sensitivity can be ascribed to the massive hydrophilic functional groups absorbed on the h-BN nanosheet *** from the high humidity sensing performances,contactless Morse code messaging and human writing and speech recognition have been *** work demonstrates the great potential of the high-performance h-BN nanosheet-based humidity sensors for future contactless sensing devices.

关键词： boron nitride humidity sensors contactless detection speech recognition

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Pressure-induced photoluminescence enhancement and ambient retention in confined carbon dots

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Nano Research 2022年第3期15卷 2545-2551页

作者： Qing Lou xigui yang Kaikai Liu Zhongzheng Ding Jinxu Qin Yizhe Li Chaofan Lv Yuan Shang Yuewen Zhang Zhuangfei Zhang Jinhao Zang Lin Dong Chong-Xin Shan Henan Key Laboratory of Diamond Optoelectronic Materials and Devices Key Laboratory of Material PhysicsMinistry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450001China Supercomputer Center Zhengzhou UniversityZhengzhou 450001China

Piezochromic luminescent materials have shown great potential in advanced optoelectronic ***,most of luminescent materials usually undergo emission quenching under external ***,we demonstrate for the first time that the photoluminescence of carbon dots(CDs)confined within sodium hydroxide can be enhanced when high pressure is *** exhibit a 1.6-fold fluorescence enhancement compared with pristine ***,the enhanced fluorescence intensity can be retained after the release of pressure to ambient conditions.A combination of experimental analysis and theoretical simulations indicates that such an enhanced emission is mainly attributed to the strong conﬁnement resulting from the sodium hydroxide matrix,which can separate the CDs spatially and restrict the nonradiative *** results provide a rational strategy for manipulating the optical properties of CDs with enhanced and retainable photoluminescence(PL)performance,thus opening up a venue for designing luminescent CDs-based materials.

关键词： carbon nanodots high pressure piezochromic fluorescence confinement effect emission enhancement

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Computational Prediction of a Novel Superhard sp^(3) Trigonal Carbon Allotrope with Bandgap Larger than Diamond

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Chinese Physics Letters 2021年第7期38卷 51-55页

作者： Ruoyun Lv xigui yang Dongwen yang Chunyao Niu Chunxiang Zhao Jinxu Qin Jinhao Zang Fuying Dong Lin Dong Chongxin Shan Henan Key Laboratory of Diamond Optoelectronic Materials and Devices Key Laboratory of Material Physics(Ministry of Education)School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China College of Automotive Engineering Jilin UniversityChangchun 130022China

Searching for new carbon allotropes with superior properties has been a longstanding interest in material sciences and condensed matter *** we identify a novel superhard carbon phase with an 18-atom trigonal unit cell in a full-sp^(3) bonding network,termed tri-C_(18) carbon,by first-principles *** structural stability has been verified by total energy,phonon spectra,elastic constants,and molecular dynamics ***,tri-C_(18) carbon has a high bulk modulus of 400 GPa and Vickers hardness of 79.0 GPa,comparable to those of ***,the simulated x-ray diffraction pattern of tri-C_(18) carbon matches well with the previously unexplained diffraction peaks found in chimney soot,indicating the possible presence of tri-C_(18) ***,electronic band structure calculations reveal that tri-C_(18) carbon has a wide indirect bandgap of 6.32 eV,larger than that of cubic diamond,indicating its great potential in electronic or optoelectronic devices working in the deep ultraviolet region.

关键词： electronic ultraviolet modulus

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A superradiant maser with nitrogen-vacancy center spins

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Science China(Physics,Mechanics & Astronomy) 2022年第1期65卷 61-70页

作者： Qilong Wu Yuan Zhang xigui yang Shi-Lei Su Chongxin Shan Klaus Mølmer Henan Key Laboratory of Diamond Optoelectronic Materials and Devices Key Laboratory of Material PhysicsMinistry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450052China Aarhus Institute of Advanced Studies Center for Complex Quantum SystemsDepartment of Physics and AstronomyAarhus UniversityAarhus C DK-8000Denmark

Recent experiments have demonstrated Rabi-oscillations, superradiant pulses and stimulated emission from negatively-charged nitrogen-vacancy(NV;) center spins in microwave resonators. These phenomena witness the kind of collective and strong coupling which has been the prerequisite for observation of superradiant lasing in the optical frequency regime. In this article, we investigate the possibility to employ coherence, present in both the collective NV-spin ensemble and the microwave field, to achieve a superradiant maser. Our calculations show that a superradiant maser with a linewidth below millihertz can be achieved with moderate kilohertz incoherent pumping of over 10;spins at room temperature. We show that the superradiant masing prevails in the presence of inhomogeneous broadening, and we present numerical and analytical studies of the dependence of the phenomenon on the various physical parameters.

关键词： superradiance maser NV center spins

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Novel Superhard sp3 Carbon Allotrope from Cold-Compressed C70 Peapods

Novel Superhard sp3 Carbon Allotrope from Cold-Compressed C7...

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第十九届全国光散射学术会议

作者： Bingbing Liu xigui yang Mingguang Yao State Key Lab of Superhard Materials Jilin University

Design and synthesis of new carbon allotropes have always been important topics in condensed matter physics and materials *** we report a new carbon allotrope,formed from cold-compressed C peapods,which

关键词： High pressure superhard carbon allotrope

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利妥昔单抗联合化疗治疗复发B细胞恶性淋巴瘤的回顾性分析

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中国肿瘤临床 2009年第4期36卷 203-206页

作者：杜芹杨锡贵山东省肿瘤防治研究院

目的：探讨含利妥昔单抗（关罗华）方案在复发B细胞性淋巴瘤治疗中的效果，同时分析影响疗效的相关因素。方法：回顾性总结我院用利妥昔单抗单药或联合化疗对复发B细胞恶性淋巴瘤患者的疗效及不良反应和影响因素。结果：20例可评价疗效... 详细信息

目的：探讨含利妥昔单抗（关罗华）方案在复发B细胞性淋巴瘤治疗中的效果，同时分析影响疗效的相关因素。方法：回顾性总结我院用利妥昔单抗单药或联合化疗对复发B细胞恶性淋巴瘤患者的疗效及不良反应和影响因素。结果：20例可评价疗效的患者中2例用利妥昔单抗单药，弄，3妥昔单抗联合化疗者18例，总有效率（RR）70％（14／20），完全缓解率（CR）20％（4／20）。中位总生存期是17．5个月，1年、2年及3年的总生存率分别是68％、45％和32％；中位无进展生存期是11．5个月，1、2、3年的无进展生存率分别是55％、32％和23％。疗效与临床分期、IPI评分、结外侵犯有关，与其他因素无明显相关。输注利妥昔单抗后主要不良反应为畏寒、发热、乏力等输注相关反应。结论：利妥昔单抗应用于复发B细胞性淋巴瘤疗效高，不良反应可以耐受。

关键词：利妥昔单抗非霍奇金淋巴瘤/化学疗法挽救治疗

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Novel Superhard sp3 Carbon Allotrope from Cold Compressed C70 Peapods

Novel Superhard sp3 Carbon Allotrope from Cold Compressed C7...

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第十八届中国高压科学学术会议

作者： xigui yang Xiangying Wu Mingguang Yao Ran Liu Tian Cui Bingbing Liu State Key Lab of Superhard Materials Jilin University

Design and synthesis of new carbon allotropes have been attracting intensive attentiondue to their potential applications in various *** we report a new carbon allotropewith a fullysp3-bonded monoclinic structure(termed Vcarbon)which has been synthesized from compressing C70 peapods and identified by theoretical *** simulated x-ray diffraction pattern,near K-edge spectroscopyand phonon spectrumagree well with our experimental *** calculations

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The expression of cyclooxygenase-2 （COX-2） and p16 in non-Hodgkin＇s lymphomas and its clinical significance

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The Chinese-German Journal of Clinical Oncology 2009年第2期8卷 104-109页

作者： xigui yang Huazhi Zhang Ling Wei Liya Jia Shandong Tumor Hospital Jinan 250117 China The Third Hospital of-Jinan Jinan 250000 China

Objective： To investigate the expression of cyclooxygenase-2 （COX-2） and p16 proteins in non-Hodgkin＇s lymphomas （NHL） and their relationship with the genesis and progress of it. Methods： The expression of COX-2 and p16 protein were studied in the lymph nodes tissue from 60 NHL patients and 10 control patients with non-malignant diseases by flow cytometry. Results： Positive rate of COX-2 protein expression in NHL tissues （63.3%, 38/60） was higher than that in normal lymphaden tissues （0, 0/10）. The difference was significant between the two groups （P 〈 0.01）. Expression of COX-2 protein was related with the clinical stage of NHL. In stage Ⅰ ＋ Ⅱ patients, it was significantly lower （35.0% ± 54.6%） than that in stage Ⅲ ＋ Ⅳ patients （84.6% ±87.5%）（P 〈 0.01）. In different sex, age, tumor malignant degree, IPI grade, extranodal involvement and B symptoms groups, the differences of COX-2 expression were not statistically significant （P 〉 0.05）. Positive rate of p16 protein expression （41.7%, 25/60） in NHL＇ was statistically lower than that in normal lymphomas （100%, 10/10）（P 〈 0.01）. Expression of p16 protein was related to malignant degree of NHL. The positive rates of p16 protein in low malignant degree tissues （64.7%, 11/17） was higher than that in high malignant degree tissues （14.3%, 2/14）（P 〈 0.05）. Positive rates of p16 protein of NHL tissues in different sex, age, IPI grade, extranodal involvement, clinical stages and B symptoms were not statistically significant （P 〉 0.05）. The p16 protein expression in COX-2 positive patients was 47.4% （18/38）, and in negative patients it was 31.8% （7/22）. There was no statistically difference between them （P 〉 0.05）. Correlation analysis revealed there was no correlation between expression of COX-2 and p16 protein. Conclusion： Both COX-2 and p16 protein may all have relationship with the genesis and progress of NHL. The expression of COX-2 protein in NHL may be a poor prognostic indicator. COX-2 and p16 protein probably have

关键词： non-Hodgkin's lymphomas p16 protein cyclooxygenase-2 flow cytometry

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山东地区520例淋巴瘤临床病理特点分析

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中国肿瘤临床 2015年第8期42卷 426-431页

作者：杨喜格杨锡贵姜超王馨媛山东省肿瘤医院肿瘤内科济南市250117 山东省医学科学院济南大学医学与生命科学学院

目的：分析山东省地区近3年淋巴瘤患者的病理类型及临床特点。方法：回顾性分析山东省肿瘤医院及山东省医学科学院附属医院2011年9月至2014年9月收治的520例淋巴瘤患者资料,从性别、发病年龄、病理类型、发病部位等方面进行总结分析。... 详细信息

目的：分析山东省地区近3年淋巴瘤患者的病理类型及临床特点。方法：回顾性分析山东省肿瘤医院及山东省医学科学院附属医院2011年9月至2014年9月收治的520例淋巴瘤患者资料,从性别、发病年龄、病理类型、发病部位等方面进行总结分析。结果：520例淋巴瘤患者中,男女比例为1.2：1,中位年龄51岁,霍奇金淋巴瘤（HL）67例占12.9%,非霍奇金淋巴（NHL）453例占87.1%。NHL中75.9%为B细胞淋巴瘤,24.1%为T/NK细胞淋巴瘤。HL以经典型霍奇金淋巴瘤结节硬化型为主,占52.2%,年龄分布未见双峰性。NHL最常见类型为弥漫大B细胞淋巴瘤（DLBCL）占54.1%,其构成比高于其他国家和地区（18%~42.7%）,男女比例为0.9：1,发病年龄略早（中位年龄54岁）。HL和NHL发病部位均以颈部淋巴结多见,且NHL结外起病多于结内起病。结论：520例淋巴瘤以DLBCL最常见,多数亚型以男性发病比例较高,但DLBCL以女性发病率较高。结外淋巴瘤以鼻腔及胃肠道多见。

关键词：淋巴瘤发病特点临床病理分类

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