"2020年后全球生物多样性框架"是当前《生物多样性公约》谈判的焦点议题之一。本文阐述了框架制定的背景,介绍了"2020年后全球生物多样性框架"不限成员名额工作组(Open Ended Working Group, OEWG),的谈判过程,综..."2020年后全球生物多样性框架"是当前《生物多样性公约》谈判的焦点议题之一。本文阐述了框架制定的背景,介绍了"2020年后全球生物多样性框架"不限成员名额工作组(Open Ended Working Group, OEWG),的谈判过程,综合分析了缔约方在各有关磋商进程中的观点,以及目前缔约方对框架各个要素的共识和分歧,评估了框架的制定进展,并就框架的设计提出四点展望:(1)阐明转型变革的具体实施路径;(2)平衡反映公约三大目标;(3)加强与其他全球治理进程的协同;(4)强化框架对全球及缔约方履约进展的评估和审查。最后提出对我国的建议:(1)及时更新国家生物多样性战略与行动计划(National Biodiversity Strategies and Action Plans, NBSAP);(2)加强国内生物多样性工作的协调;(3)继续加强生态环境执法和责任机制。为缔约方更好参与框架制定进程,深入了解框架及其磋商进展提供参考,并为下一步框架制定提供参考。展开更多
Gap-type metallic nanostructures are widely used in catalytic reactions,sensors,and photonics because the hotspot effect on these nanostructures supports giant local electromagnetic field enhancement.To achieve hotspo...Gap-type metallic nanostructures are widely used in catalytic reactions,sensors,and photonics because the hotspot effect on these nanostructures supports giant local electromagnetic field enhancement.To achieve hotspots,researchers devote themselves to reducing gap distances,even to 1 nm.However,current techniques to fabricate such narrow gaps in large areas are still challenging.Herein,a new coupling way to boost the sub-10 nm plasmonic nanogap array is developed,based on the plasmon-triggered optical waveguide resonance via near-field coupling.This effect leads to an amplified local electromagnetic field within the gap regions equivalent to narrower gaps,which is evidenced experimentally by the surface-enhanced Raman scattering intensity of probed molecules located in the gap and the finite-difference time-domain numerical simulation results.This study provides a universal strategy to promote the performance of the existing hotspot configurations without changing their geometries.展开更多
基金National Natural Science Foundation of China(21573087,21573092,21603211,21873039)Jilin Province Young Talent Fund Projects(20180520156JH).
文摘Gap-type metallic nanostructures are widely used in catalytic reactions,sensors,and photonics because the hotspot effect on these nanostructures supports giant local electromagnetic field enhancement.To achieve hotspots,researchers devote themselves to reducing gap distances,even to 1 nm.However,current techniques to fabricate such narrow gaps in large areas are still challenging.Herein,a new coupling way to boost the sub-10 nm plasmonic nanogap array is developed,based on the plasmon-triggered optical waveguide resonance via near-field coupling.This effect leads to an amplified local electromagnetic field within the gap regions equivalent to narrower gaps,which is evidenced experimentally by the surface-enhanced Raman scattering intensity of probed molecules located in the gap and the finite-difference time-domain numerical simulation results.This study provides a universal strategy to promote the performance of the existing hotspot configurations without changing their geometries.
