A new route to prepare zeolitic material was introduced in this work. Compared with traditional methods, the new route showed lower energy consume. The effect of pre-treatment conditions on structure and crystalline p...A new route to prepare zeolitic material was introduced in this work. Compared with traditional methods, the new route showed lower energy consume. The effect of pre-treatment conditions on structure and crystalline phase was investigated, revealing that the mullite crystalline phase in fly ash could be converted to amorphous phase by alkali at low temperature. The removal performance of heavy metal ions on designed material was also investigated, and we found that the intermediate product showed higher adsorption capacity on Ni^(2+) than zeolite A.展开更多
Excitons,bound electron–hole pairs,in two-dimensional hybrid organic inorganic perovskites(2D HOIPs)are capable of forming hybrid light-matter states known as exciton-polaritons(E–Ps)when the excitonic medium is con...Excitons,bound electron–hole pairs,in two-dimensional hybrid organic inorganic perovskites(2D HOIPs)are capable of forming hybrid light-matter states known as exciton-polaritons(E–Ps)when the excitonic medium is confined in an optical cavity.In the case of 2D HOIPs,they can self-hybridize into E–Ps at specific thicknesses of the HOIP crystals that form a resonant optical cavity with the excitons.However,the fundamental properties of these self-hybridized E–Ps in 2D HOIPs,including their role in ultrafast energy and/or charge transfer at interfaces,remain unclear.Here,we demonstrate that>0.5µm thick 2D HOIP crystals on Au substrates are capable of supporting multiple-orders of self-hybridized E–P modes.These E–Ps have high Q factors(>100)and modulate the optical dispersion for the crystal to enhance sub-gap absorption and emission.Through varying excitation energy and ultrafast measurements,we also confirm energy transfer from higher energy E–Ps to lower energy E–Ps.Finally,we also demonstrate that E–Ps are capable of charge transport and transfer at interfaces.Our findings provide new insights into charge and energy transfer in E–Ps opening new opportunities towards their manipulation for polaritonic devices.展开更多
Numerical simulations have revolutionized material design.However,although simulations excel at mapping an input material to its output property,their direct application to inverse design has traditionally been limite...Numerical simulations have revolutionized material design.However,although simulations excel at mapping an input material to its output property,their direct application to inverse design has traditionally been limited by their high computing cost and lack of differentiability.Here,taking the example of the inverse design of a porous matrix featuring targeted sorption isotherm,we introduce a computational inverse design framework that addresses these challenges,by programming differentiable simulation on TensorFlow platform that leverages automated end-to-end differentiation.Thanks to its differentiability,the simulation is used to directly train a deep generative model,which outputs an optimal porous matrix based on an arbitrary input sorption isotherm curve.Importantly,this inverse design pipeline leverages the power of tensor processing units(TPU)—an emerging family of dedicated chips,which,although they are specialized in deep learning,are flexible enough for intensive scientific simulations.This approach holds promise to accelerate inverse materials design.展开更多
基金supported by the 2016 Key Program of China Guodian Corporation,and the grant number is2015G1PU00200
文摘A new route to prepare zeolitic material was introduced in this work. Compared with traditional methods, the new route showed lower energy consume. The effect of pre-treatment conditions on structure and crystalline phase was investigated, revealing that the mullite crystalline phase in fly ash could be converted to amorphous phase by alkali at low temperature. The removal performance of heavy metal ions on designed material was also investigated, and we found that the intermediate product showed higher adsorption capacity on Ni^(2+) than zeolite A.
基金support for this work by the Asian Office of Aerospace Research and Development of the Air Force Office of Scientific Research(AFOSR)FA2386-20-1-4074partial support from Office of Naval Research(ONR)Young Investigator Award(YIP)(N00014-23-1-203)+7 种基金S.B.A.gratefully acknowledges funding received from the Swiss National Science Foundation(SNSF)under the Early Postdoc Mobility grant(P2ELP2_187977)for this workC.M.is supported by an NSF-AFRL Intern Program.The experiments were carried out at the Singh Center for Nanotechnology at the University of Pennsylvania,which is supported by the National Science Foundation(N.S.F.)National Nanotechnology Coordinated Infrastructure Program grant NNCI-1542153D.J.and K.L.acknowledge the NSF REU SUNFEST program under Grant No.1950720,to support the stay of K.L.at the University of PennsylvaniaThe research performed by C.E.S.at the Air Force Research Laboratory was supported by contract award FA807518D0015J.R.H.acknowledges support from the Air Force Office of Scientific Research(Program Manager Dr.Gernot Pomrenke)under award number FA9550-20RYCOR059T.D.and P.J.S.gratefully acknowledge support from Programmable Quantum Materials,an Energy Frontier Research Center funded by the U.S.Department of Energy(DOE),Office of Science,Basic Energy Sciences(BES),under award DE-SC0019443H.H.acknowledges support from the Department of Energy(DE-SC0020101)A.D.M.acknowledges support from the Army Research Office(grant W911NF2210158).
文摘Excitons,bound electron–hole pairs,in two-dimensional hybrid organic inorganic perovskites(2D HOIPs)are capable of forming hybrid light-matter states known as exciton-polaritons(E–Ps)when the excitonic medium is confined in an optical cavity.In the case of 2D HOIPs,they can self-hybridize into E–Ps at specific thicknesses of the HOIP crystals that form a resonant optical cavity with the excitons.However,the fundamental properties of these self-hybridized E–Ps in 2D HOIPs,including their role in ultrafast energy and/or charge transfer at interfaces,remain unclear.Here,we demonstrate that>0.5µm thick 2D HOIP crystals on Au substrates are capable of supporting multiple-orders of self-hybridized E–P modes.These E–Ps have high Q factors(>100)and modulate the optical dispersion for the crystal to enhance sub-gap absorption and emission.Through varying excitation energy and ultrafast measurements,we also confirm energy transfer from higher energy E–Ps to lower energy E–Ps.Finally,we also demonstrate that E–Ps are capable of charge transport and transfer at interfaces.Our findings provide new insights into charge and energy transfer in E–Ps opening new opportunities towards their manipulation for polaritonic devices.
基金H.L.acknowledges funding from the Fundamental Research Funds for the Central Universities under the Grant No.YJ202271M.B.acknowledges the National Science Foundation under the Grant No.DMREF-1922167TPU computing time was provided by a grant allocation from Google’s TensorFlow Research Cloud(TFRC)program.
文摘Numerical simulations have revolutionized material design.However,although simulations excel at mapping an input material to its output property,their direct application to inverse design has traditionally been limited by their high computing cost and lack of differentiability.Here,taking the example of the inverse design of a porous matrix featuring targeted sorption isotherm,we introduce a computational inverse design framework that addresses these challenges,by programming differentiable simulation on TensorFlow platform that leverages automated end-to-end differentiation.Thanks to its differentiability,the simulation is used to directly train a deep generative model,which outputs an optimal porous matrix based on an arbitrary input sorption isotherm curve.Importantly,this inverse design pipeline leverages the power of tensor processing units(TPU)—an emerging family of dedicated chips,which,although they are specialized in deep learning,are flexible enough for intensive scientific simulations.This approach holds promise to accelerate inverse materials design.
