Explorations of new second harmonic generation materials in Ag^+-Hg^2+/Bi^3+-selenites systems afforded three new silver selenium oxides, namely, Ag4 Hg(SeO3)2(SeO4)(1), Ag2Bi2(SeO3)3(SeO4)(2) and Ag5 Bi(SeO3)4(3). Th...Explorations of new second harmonic generation materials in Ag^+-Hg^2+/Bi^3+-selenites systems afforded three new silver selenium oxides, namely, Ag4 Hg(SeO3)2(SeO4)(1), Ag2Bi2(SeO3)3(SeO4)(2) and Ag5 Bi(SeO3)4(3). They exhibit flexible crystal chemistry. Compounds 1 and 2 are mixed valence selenium oxides containing Se(IV) and Se(VI) cations simultaneously. Compounds 1 and 3 exhibit a 3 D open framework with 4-, 6-and 8-member polyhedral ring tunnels along a, b and c axes. Compound 1 crystallized in a polar space group and could display a subtle frequency doubling efficiency about 35% of the commercial KH2PO4(KDP). UV-vis-NIR spectra reveal that compounds 1–3 are wide-band semiconductors with the optical bandgaps of 3.11, 3.65, 3.58 e V respectively. Theoretical calculations disclose that compounds2 and 3 are indirect band gap structures and their bandgaps are determined by Ag, Bi, Se and O atoms together.展开更多
近日,中国科学院深圳先进技术研究院研究员喻学锋课题组与香港城市大学教授朱剑豪、深圳大学教授张晗合作,由课题组成员孙正博和谢寒寒等成功研发出新型的超小黑磷量子点,并应用于肿瘤的光热治疗。相关论文《超小黑磷量子点的合成和光...近日,中国科学院深圳先进技术研究院研究员喻学锋课题组与香港城市大学教授朱剑豪、深圳大学教授张晗合作,由课题组成员孙正博和谢寒寒等成功研发出新型的超小黑磷量子点,并应用于肿瘤的光热治疗。相关论文《超小黑磷量子点的合成和光热治疗应用》（Ultrasmall Black Phosphorus Quantum Dots：Synthesis and Use as Photothermal Agents,DOI：10.1002/anie.201506154）已被《德国应用化学》（Angew.Chem.Int.Ed.）封面报道（Inside Cover Story）,并被评为热点文章（Hot Paper）。二维层状材料,如石墨烯和过渡金属硫化物（TMDs）等,由于其优异特性,已经成为一类在基础研究和潜在应用中拥有广阔前景的纳米材料。受到石墨烯和TMDs独特二维特性的启发,展开更多
基金supported by the National Natural Science Foundation of China(52172171,52090022,11725210,and 91963115)the Natural Science Foundation of Hebei Province of China(E2022203109)Dr.Nie A appreciates the support of the Natural Science Foundation for Distinguished Young Scholars of Hebei Province(E2020203085)。
基金supported by the National Natural Science Foundation of China (21773244 and 21875248)the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB20000000)the Natural Science Foundation of Fujian Province (2018J01025)
文摘Explorations of new second harmonic generation materials in Ag^+-Hg^2+/Bi^3+-selenites systems afforded three new silver selenium oxides, namely, Ag4 Hg(SeO3)2(SeO4)(1), Ag2Bi2(SeO3)3(SeO4)(2) and Ag5 Bi(SeO3)4(3). They exhibit flexible crystal chemistry. Compounds 1 and 2 are mixed valence selenium oxides containing Se(IV) and Se(VI) cations simultaneously. Compounds 1 and 3 exhibit a 3 D open framework with 4-, 6-and 8-member polyhedral ring tunnels along a, b and c axes. Compound 1 crystallized in a polar space group and could display a subtle frequency doubling efficiency about 35% of the commercial KH2PO4(KDP). UV-vis-NIR spectra reveal that compounds 1–3 are wide-band semiconductors with the optical bandgaps of 3.11, 3.65, 3.58 e V respectively. Theoretical calculations disclose that compounds2 and 3 are indirect band gap structures and their bandgaps are determined by Ag, Bi, Se and O atoms together.
文摘近日,中国科学院深圳先进技术研究院研究员喻学锋课题组与香港城市大学教授朱剑豪、深圳大学教授张晗合作,由课题组成员孙正博和谢寒寒等成功研发出新型的超小黑磷量子点,并应用于肿瘤的光热治疗。相关论文《超小黑磷量子点的合成和光热治疗应用》（Ultrasmall Black Phosphorus Quantum Dots：Synthesis and Use as Photothermal Agents,DOI：10.1002/anie.201506154）已被《德国应用化学》（Angew.Chem.Int.Ed.）封面报道（Inside Cover Story）,并被评为热点文章（Hot Paper）。二维层状材料,如石墨烯和过渡金属硫化物（TMDs）等,由于其优异特性,已经成为一类在基础研究和潜在应用中拥有广阔前景的纳米材料。受到石墨烯和TMDs独特二维特性的启发,
