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Scientists Report New Wideband Two-Dimensional Nonlinear Optical Materials and Devices


Chinese Academy of Sciences
Recently, Chinese scientists reported a new class of two-dimensional (2D) third-order nonlinear optical (NLO) materials, called metallated graphynes. The new material, exhibits broadband (at both 532 and 1064 nm) saturable absorption NLO property and high laser damage threshold.
Researchers prepared two free-standing mercurated graphyne nanosheets by applying an interface-assisted bottom-up method. The large-area nanosheets derived from the chemical growth have shown their layered molecular structural arrangement, controllable thickness and enhanced π-conjugation. The mercurated graphyne nanosheets are therefore having stable and outstanding broadband nonlinear saturable absorption properties.
With the help of the absorption ability, the metallated graphynes are acting as saturable absorbers. And it has better pulse properties and Q-switched performances, especially comparing with traditional 2D materials (like graphene, black phosphorus). ....

Hong Kong , Yueng Wong , Technical Institute Of Physics , Chemistry Of The Chinese Academy Sciences , Shandong University , Hong Kong Polytechnic University , Angewandte Chemie International Edition , Wai Yueng Wong , Technical Institute , Chinese Academy , Chemical Structures , Interface Assisted Preparation , Metallated Graphynes , Chinese Academy Of Sciences , Hong Kong Polytechnic University , Institute Of Physics , Hong Kong , ஹாங் காங் , தொழில்நுட்ப நிறுவனம் ஆஃப் இயற்பியல் , வேதியியல் ஆஃப் தி சீன கலைக்கழகம் அறிவியல் , சாண்டோங் பல்கலைக்கழகம் , ஹாங் காங் பாலிடெக்நிக் பல்கலைக்கழகம் , தொழில்நுட்ப நிறுவனம் , சீன கலைக்கழகம் , சீன கலைக்கழகம் ஆஃப் அறிவியல் ,

ARS to Recover Waste Heat: New Method of Natural Gas Pre-cooling in LNG Plant


Chinese Academy of Sciences
Developing clean and low-carbon natural gas is a key point of the nation’s energy development strategy, and also an important measure to achieve “Carbon Neutral”. China’s natural gas reserves exceed 100 trillion cubic meters, while more than 70% of the reserves are unconventional dispersed sources (i.e. coal-bed methane, tight gas). By processing the unconventional dispersed natural gas sources, they are vented or burned directly which result in serious energy waste and environmental pollution.
It is of great social significance and economic benefit to develop skid-mounted Liquefied Natural Gas (LNG) plants for the gathering and transportation of dispersed natural gas sources. Current skid-mounted LNG technology is focusing on main-cooling process, but paying less attention to the pre-cooling stage. And it is found that pre-cooling stage by adopting Compression Refrigeration System (CRS) even consumes more than 20% of the total power co ....

China General , Technical Institute Of Physics , National Science Fund For Distinguished Young Scholars , International Journal Of Refrigeration On , International Partnership Program , Chinese Academy Of Sciences , Liquefied Natural Gas , Compression Refrigeration System , Absorption Refrigeration System , Technical Institute , Chinese Academy , International Journal , National Science Fund , Distinguished Young Scholars , Institute Of Physics , Carbon Neutral , Natural Gas , சீனா ஜநரல் , தொழில்நுட்ப நிறுவனம் ஆஃப் இயற்பியல் , தேசிய அறிவியல் நிதி க்கு புகழ்பெற்ற இளம் அறிஞர்கள் , சர்வதேச கூட்டு ப்ரோக்ர்யாம் , சீன கலைக்கழகம் ஆஃப் அறிவியல் , திரவமாக்கப்பட்டது இயற்கை வாயு , தொழில்நுட்ப நிறுவனம் , சீன கலைக்கழகம் , சர்வதேச இதழ் ,

China makes breakthrough in large-scale cryogenic refrigeration technology--China Economic Net


China s large-scale cryogenic refrigeration technology, which is fundamental for important industrial sectors such as aerospace and hydrogen energy, has made a major breakthrough, with the ability to cool down -271C with hundred-watt level power. 
 
China s major scientific research project for developing the large-scale cryogenic refrigeration system in liquid helium to superfluid helium temperature range has passed experts appraisal, Xinhua reported on Saturday. This project is supported by the Ministry of Finance and undertaken by the Technical Institute of Physics and Chemistry of the Chinese Academy of Sciences (TIPC-CAS). 
 
China can now develop large-scale cryogenic refrigeration equipment with a liquid helium temperature of 4.2K (-269 C) kilowatt level and superfluid helium temperature of 2K (-271C) hundred-watt level, a milestone which has broken technology monopoly by the developed countries, and made China s large-scale cryogenic refrigeration tech ....

Fu Bo , Lin Boqiang , Chemistry Of The Chinese Academy Sciences , Technical Institute Of Physics , Energy Policy At Xiamen University , China Institute For , Technical Institute , Chinese Academy , China Institute , Energy Policy , Xiamen University , Global Times , ஃபூ போ , வேதியியல் ஆஃப் தி சீன கலைக்கழகம் அறிவியல் , தொழில்நுட்ப நிறுவனம் ஆஃப் இயற்பியல் , சீனா நிறுவனம் க்கு , தொழில்நுட்ப நிறுவனம் , சீன கலைக்கழகம் , சீனா நிறுவனம் , ஆற்றல் பாலிஸீ , உலகளாவிய முறை ,