Results 61 to 70 of about 5,309,688 (326)

Exploring Pb‐Chelation Chemistry in the Crystallization Dynamics of Halide Perovskites

open access: yesAdvanced Functional Materials, EarlyView.
A mechanism of how Pb‐chelation chemistry governs coordination geometry and initial nucleation behavior at the precursor level of halide perovskite, by regulating the deprotonation state of a chelating additive, is elucidated. This allows for innovative reaction‐system design principles that promote coherent growth while suppressing defect formation in
Byeong Jun Kim   +13 more
wiley   +1 more source

Designing Nanotechnology Commercialization Policies Based on Supporting Start-Up Companies and Challenges in Iran [PDF]

open access: yesسیاست نامه علم و فناوری, 2018
One of the main challenges of innovators in the process of developing nanotechnology is how to turn this technology into products and services that bring positive economic returns to founders and investors.
Shahriar Kazemi Azar
doaj  

Speaker Biographies: Reach to Space Conference on Space Commercialization: A Celebration of 50 Years in Space

open access: yes, 2021
Speaker Biographies: Reach to Space Conference on Space Commercialization: A Celebration of 50 Years in Space Edward D. Horowitz Phillip Spector John Mattingly Robert Bell Joseph N. Pelton Courtney Stadd Gregg Maryniak J.
Flournoy, D.
core  

High‐Index, Low‐Loss Optical Material Platforms for Ultra‐Broadband Ultraviolet‐to‐Visible Achromatic Metalenses

open access: yesAdvanced Functional Materials, EarlyView.
An integrated material platform combining engineered SiNx thin films and printable ZrO2 nanoparticle‐embedded resin enables broadband achromatic metalenses from the ultraviolet to visible range. The demonstrated meta‐optics achieve near‐diffraction‐limited focusing with minimal chromatic aberration.
Hyunjung Kang   +3 more
wiley   +1 more source

Dual‐Function Interface Engineering for δ‐Phase‐Free Crystallization Toward Efficient and Stable FAPbI3 Perovskite Solar Cells

open access: yesAdvanced Functional Materials, EarlyView.
This work presents a dual‐function interface engineering strategy using PEACl to suppress the formation of the non‐perovskite δ‐FAPbI3 phase at the critical SnO2 buried interface. This approach enables the direct crystallization of the photoactive α‐phase, yielding highly efficient and stable rigid (25.6%) and flexible perovskite solar cells with ...
Xiao Wu   +7 more
wiley   +1 more source

Chlorination‐Enabled Oxygen Control and Dual‐Sulfur Source Aided Trap Passivation to Unlock 8.24% Efficient Sb2S3 Photovoltaic Devices

open access: yesAdvanced Functional Materials, EarlyView.
This work demonstrates a scalable, low‐temperature synthesis strategy that combines a thioacetamide (TA)‐based dual sulfur source with CdS chlorination, enabling the formation of high‐quality Sb2S3 with a reduced open‐circuit voltage loss, resulting in improved device efficiency.
Vijay C. Karade   +16 more
wiley   +1 more source

Interplay Between Phase Evolution, Fe Migration, and Oxygen Redox in O3‐Type NaxFeyMn1−yO2 Cathodes

open access: yesAdvanced Functional Materials, EarlyView.
Why do Na‐ion battery cathodes, that are compositionally closely related, follow different structural paths during battery operation? This work shows how Fe content controls when iron atoms migrate from their original sites. Early migration locks the layers and blocks key phase transitions, whereas delayed migration permits fuller structural ...
Morten Johansen   +4 more
wiley   +1 more source

Commercialization progress and challenges of manned high-altitude balloon space edge tourism

open access: yesHangkong gongcheng jinzhan
High-altitude balloons have been employed for space science experiments and verification for over 70 years. It is of a mature technical foundation for manned high-altitude balloon flight tests to conduct on space edge tourism.
ZHANG Shuqi   +4 more
doaj   +1 more source

Development of the urban space surrounding selected railway stations in Poland

open access: yesEnvironmental & Socio-economic Studies, 2017
At present, many railway stations, in spite of being architecturally valuable, are subject to de-capitalization and degradation, which increasingly leads to demolition including elements or even entire railway stations of historical importance. Therefore,
Dragan Weronika
doaj   +1 more source

52nd Session of the Legal Subcommittee of the UN Committee on the Peaceful Uses of Outer Space and the Problems of International Space Law

open access: yesМосковский журнал международного права, 2013
The UN Committee on the Peaceful Uses of Outer Space 27, which consists of the Scientific and Technical and the Legal Subcommittees, is the main international centre for the interaction of states and international organizations in the area of space ...
G. P. Zhukov, O. A. Volynskaya
doaj   +1 more source

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