Harvesting renewable water energy in various formats such as raindrops,waves,and evaporation is one of the key strategies for achieving global carbon neutrality.The recent decade has witnessed rapid advancement of the...Harvesting renewable water energy in various formats such as raindrops,waves,and evaporation is one of the key strategies for achieving global carbon neutrality.The recent decade has witnessed rapid advancement of the droplet‐based electricity generator(DEG)with a continuous leap in the instantaneous output power density from 50W/m2 to several kW/m2.Despite this,further pushing the upper limit of the output performance of DEG is still constrained by low surface charge density and long precharging time.Here,we report a DEG incorporating the Kelvin water dropper(K‐DEG)that can generate an ultrahigh instantaneous power density of 105W/m2 upon one droplet impinging.In this design,the Kelvin water dropper continuously replenishes the high density of surface charges on DEG,while DEG fully releases these surface charges into electric output.K‐DEG with such a high output can directly light five 6‐W commercial lamps and even charge a cellphone by using falling droplets.展开更多
Molecular profiling of cell-surface proteins is a powerful strategy for precise cancer diagnosis.While mass cytometry(MC)enables synchronous detection of over 40 cellular parameters,its full potential in disease class...Molecular profiling of cell-surface proteins is a powerful strategy for precise cancer diagnosis.While mass cytometry(MC)enables synchronous detection of over 40 cellular parameters,its full potential in disease classification is challenged by the limited types of recognition probes currently available.In this work,we synthesize a panel of heavy isotopeconjugated aptamers to profile cancer-associated signatures on the surface of hematological malignancy(HM)cells.Based on 15 molecular signatures,we performed cell-surface profiling that allowed the precise classification of 8 HM cell lines.Combined with machine-learning technology,this aptamer-based MC platform also achieved multiclass identification of HM subtypes in clinical sampleswith 100%accuracy in the training cohort and 80%accuracy in the test cohort.Therefore,we report an effective and practical strategy for precise cancer classification at the singlecell level,paving the way for its clinical use in the near future.展开更多
Environmental deterioration,especially water pollution,is widely dispersed and could affect the quality of people's life at large.Though the sewage treatment plants are constructed to meet the demands of cities,di...Environmental deterioration,especially water pollution,is widely dispersed and could affect the quality of people's life at large.Though the sewage treatment plants are constructed to meet the demands of cities,distributed treatment units are still in request for the supplementary of centralized purification beyond the range of plants.Electrochemical degradation can reduce organic pollution to some degree,but it has to be powered.Triboelectric nanogenerator(TENG)is a newly-invented technology for low-frequency mechanical energy harvesting.Here,by integrating a rotary TENG(R-TENG)as electric power source with an electrochemical cell containing a modified graphite felt cathode for hydrogen peroxide(H2O2)along with hydroxyl radical(·OH)generation by Fenton reaction and a platinum sheet anode for active chlorine generation,a self-powered electrochemical system(SPECS)was constructed.Under the driven of mechanical energy or wind flow,such SPECS can efficiently degrade dyes after power management in neutral condition without any O2 aeration.This work not only provides a guideline for optimizing self-powered electrochemical reaction,but also displays a strategy based on the conversion from distributed mechanical energy to chemical energy for environmental remediation.展开更多
Ammonia synthesis using low-power consumption and eco-friendly methods has attracted increasing attention.Here,based on the Tesla turbine triboelectric nanogenerator(TENG),we designed a simple and effective self-power...Ammonia synthesis using low-power consumption and eco-friendly methods has attracted increasing attention.Here,based on the Tesla turbine triboelectric nanogenerator(TENG),we designed a simple and effective self-powered ammonia synthesis system by N_(2) discharge.Under the driving of the simulated waste gas,the Tesla turbine TENG showed high rotation speed and high output.In addition,the performance of two Tesla turbine TENGs with different gas path connections was systematically investigated and discussed.A controllable series-parallel connection with the control of gas supply time was also proposed.Taking advantage of the intrinsic high voltage,corona discharge in a N_(2) atmosphere was simply realized by a Tesla turbine TENG.With the flow of N_(2),the generated high-energy plasma can immediately react with water molecules to directly produce ammonia.The self-powered system achieved a yield of 2.14μg h^(−1)(0.126μmol h^(−1))under ambient conditions,showing great potential for large-scale synthesis.展开更多
Engineering materials serving in marine surroundings are inevitably corroded.The corrosive marine conditions can also be utilized to harvest kinetic ocean wave energy to solve this problem.Leveraging water–solid trib...Engineering materials serving in marine surroundings are inevitably corroded.The corrosive marine conditions can also be utilized to harvest kinetic ocean wave energy to solve this problem.Leveraging water–solid triboelectrification to harvest lowfrequency wave energy for active anticorrosion is promising.Existing techniques are efficient in harnessing environmental energy with frequencies higher than 3 Hz,whereas the dominated ocean waves with optimal wave spectral density fluctuate from 0.45 to 1.5 Hz.Herein,we proposed a highly efficient and sustainable blue energy-powered cathodic protection(BECP)strategy by fusing water–solid triboelectric nanogenerators and cathodic protection technology.Leveraging the highly efficient triboelectrification between the moving water and hydrophobic fluorinated ethylene propylene tube,we developed the built-in power module,enabling the harvest of ocean wave energy lower than 1.5 Hz.The generated volumetric current density is 28.9 mA·m^(-3),5–20 times higher than the values of the reported devices.Moreover,the proposed BECP performs comparably to conventional cathodic protection in corrosion inhibition.Significantly,the proposed approach can be easily applied to ships,buoys,and other offshore platforms to simultaneously realize blue energy harvesting and engineering material protection,providing an alternative to traditional active protection technology.展开更多
基金National Natural Science Foundation of China,Grant/Award Numbers:51975502,T2293694Research Grants Council of Hong Kong,Grant/Award Numbers:PDFS2122‐1S02,C1006‐20W,11213320,11219219+1 种基金Shenzhen Science and Technology Innovation Council,Grant/Award Number:SGDX20201103093005028Tencent Foundation。
文摘Harvesting renewable water energy in various formats such as raindrops,waves,and evaporation is one of the key strategies for achieving global carbon neutrality.The recent decade has witnessed rapid advancement of the droplet‐based electricity generator(DEG)with a continuous leap in the instantaneous output power density from 50W/m2 to several kW/m2.Despite this,further pushing the upper limit of the output performance of DEG is still constrained by low surface charge density and long precharging time.Here,we report a DEG incorporating the Kelvin water dropper(K‐DEG)that can generate an ultrahigh instantaneous power density of 105W/m2 upon one droplet impinging.In this design,the Kelvin water dropper continuously replenishes the high density of surface charges on DEG,while DEG fully releases these surface charges into electric output.K‐DEG with such a high output can directly light five 6‐W commercial lamps and even charge a cellphone by using falling droplets.
基金the National Key Research Program(grant nos.2021YFA0910101,2018YFC1602900,and 2019YFA0905800)the National Natural Science Foundation of China(NSFC+1 种基金grant nos.21922404,22174039,22107027,and 21827811)the Science and Technology Project of Hunan Province(grant nos.2022JJ10005,2021RC4022,2019SK2201,2018RS3035,and 2017XK2103).
文摘Molecular profiling of cell-surface proteins is a powerful strategy for precise cancer diagnosis.While mass cytometry(MC)enables synchronous detection of over 40 cellular parameters,its full potential in disease classification is challenged by the limited types of recognition probes currently available.In this work,we synthesize a panel of heavy isotopeconjugated aptamers to profile cancer-associated signatures on the surface of hematological malignancy(HM)cells.Based on 15 molecular signatures,we performed cell-surface profiling that allowed the precise classification of 8 HM cell lines.Combined with machine-learning technology,this aptamer-based MC platform also achieved multiclass identification of HM subtypes in clinical sampleswith 100%accuracy in the training cohort and 80%accuracy in the test cohort.Therefore,we report an effective and practical strategy for precise cancer classification at the singlecell level,paving the way for its clinical use in the near future.
基金the National Key Technology R&D Program of China(No.2016YFA0202704)Beijing Municipal Science 8c Technology Commission(Nos.Z171100000317001,Z171100002017017,and Y3993113DF)the National Natural Science Foundation of China(Nos.51432005,5151101243,51561145021,and 21761142011).
文摘Environmental deterioration,especially water pollution,is widely dispersed and could affect the quality of people's life at large.Though the sewage treatment plants are constructed to meet the demands of cities,distributed treatment units are still in request for the supplementary of centralized purification beyond the range of plants.Electrochemical degradation can reduce organic pollution to some degree,but it has to be powered.Triboelectric nanogenerator(TENG)is a newly-invented technology for low-frequency mechanical energy harvesting.Here,by integrating a rotary TENG(R-TENG)as electric power source with an electrochemical cell containing a modified graphite felt cathode for hydrogen peroxide(H2O2)along with hydroxyl radical(·OH)generation by Fenton reaction and a platinum sheet anode for active chlorine generation,a self-powered electrochemical system(SPECS)was constructed.Under the driven of mechanical energy or wind flow,such SPECS can efficiently degrade dyes after power management in neutral condition without any O2 aeration.This work not only provides a guideline for optimizing self-powered electrochemical reaction,but also displays a strategy based on the conversion from distributed mechanical energy to chemical energy for environmental remediation.
基金supported by the National Key R&D Project from the Minister of Science and Technology(2016YFA0202704)Youth Innovation Promotion Association,CAS,Beijing Municipal Science&Technology Commission(Z171100000317001,Z171100002017017,Y3993113DF)+2 种基金National Natural Science Foundation of China(Grant No.52002028,51605033,51432005,5151101243,51561145021)China Postdoctoral Science Foundation(Grant No.BX20190324)Fundamental Research Funds for the Central Universities.
文摘Ammonia synthesis using low-power consumption and eco-friendly methods has attracted increasing attention.Here,based on the Tesla turbine triboelectric nanogenerator(TENG),we designed a simple and effective self-powered ammonia synthesis system by N_(2) discharge.Under the driving of the simulated waste gas,the Tesla turbine TENG showed high rotation speed and high output.In addition,the performance of two Tesla turbine TENGs with different gas path connections was systematically investigated and discussed.A controllable series-parallel connection with the control of gas supply time was also proposed.Taking advantage of the intrinsic high voltage,corona discharge in a N_(2) atmosphere was simply realized by a Tesla turbine TENG.With the flow of N_(2),the generated high-energy plasma can immediately react with water molecules to directly produce ammonia.The self-powered system achieved a yield of 2.14μg h^(−1)(0.126μmol h^(−1))under ambient conditions,showing great potential for large-scale synthesis.
基金We acknowledge the financial support from the National Natural Science Foundation of China(No.51975502)the Research Grants Council of Hong Kong(Nos.SRFS2223-1S01,C1006-20W,11213320,and 11219219)+3 种基金the Shenzhen Science and Technology Innovation Council(No.SGDX20201103093005028)the Innovation and Technology Commission of HongKong(Nos.GHP/021/19SZ and GHP/092/20GD)the Science and Technology Planning Project of Guangdong Province(No.2021A0505110002)the Tencent Foundation through the XPLORER PRIZE.
文摘Engineering materials serving in marine surroundings are inevitably corroded.The corrosive marine conditions can also be utilized to harvest kinetic ocean wave energy to solve this problem.Leveraging water–solid triboelectrification to harvest lowfrequency wave energy for active anticorrosion is promising.Existing techniques are efficient in harnessing environmental energy with frequencies higher than 3 Hz,whereas the dominated ocean waves with optimal wave spectral density fluctuate from 0.45 to 1.5 Hz.Herein,we proposed a highly efficient and sustainable blue energy-powered cathodic protection(BECP)strategy by fusing water–solid triboelectric nanogenerators and cathodic protection technology.Leveraging the highly efficient triboelectrification between the moving water and hydrophobic fluorinated ethylene propylene tube,we developed the built-in power module,enabling the harvest of ocean wave energy lower than 1.5 Hz.The generated volumetric current density is 28.9 mA·m^(-3),5–20 times higher than the values of the reported devices.Moreover,the proposed BECP performs comparably to conventional cathodic protection in corrosion inhibition.Significantly,the proposed approach can be easily applied to ships,buoys,and other offshore platforms to simultaneously realize blue energy harvesting and engineering material protection,providing an alternative to traditional active protection technology.
