A new type of philosophy and mathematics from the pansystems view is introduced here, including the 7 philosophy theories (7PT) and related mathematizing researches. Many second/third philosophies are developed within...A new type of philosophy and mathematics from the pansystems view is introduced here, including the 7 philosophy theories (7PT) and related mathematizing researches. Many second/third philosophies are developed within pansystems framework and related applications to APT MS.展开更多
A new type of philosophy and mathematics from the pansytems view is introduced here,including the 7 philosophic theories(7PT)and related mathematic researches.Many second/third philosophies are developed within pansvs...A new type of philosophy and mathematics from the pansytems view is introduced here,including the 7 philosophic theories(7PT)and related mathematic researches.Many second/third philosophies are developed within pansvstems framework and related applications to APTMS.展开更多
DAC CO_(2)capture is gaining wide attention as one of the most difficult carbon approaches to tackle climate change.In this work,different pore-size silica spheres were grafted using different amine groups such as APT...DAC CO_(2)capture is gaining wide attention as one of the most difficult carbon approaches to tackle climate change.In this work,different pore-size silica spheres were grafted using different amine groups such as APTES,APTMS,and Diamine.Herein,all samples based on the wet and dry grafting method were used for CO_(2)adsorption isotherm at room temperature and pressure(298 K and 1 bar).The sample based on the wet grafting(Silica-APTES-W)sample shows the highest CO_(2)uptake 1.67 mmol/g.Also,the adsorption isotherm of the Silica-APTES-W sample was showed a high capacity of CO_(2)1.2 mmol/g at 25℃,which describes the strong physical interaction between CO_(2)and amine.The isosteric adsorption of Silica-APTES-W also confirmed that the physical adsorption was dominant because of low adsorption heat ranging from 23 to 37 k J/mol.Also,the fixed bed experiment was conducted with 2000 ppm CO_(2)that obtains the optimal working capacity 4.5 m L/g with the lowest regeneration temperature 90℃.It was shown that Silica-APTES-W sample was superior performance for DAC CO_(2)capture in practical applications.展开更多
Acetone detection is crucial for diagnosing diseases such as diabetes and lung cancer.Therefore,it is essential to design a room-temperature acetone gas sensor with fast response and recovery times,high sensitivity,hi...Acetone detection is crucial for diagnosing diseases such as diabetes and lung cancer.Therefore,it is essential to design a room-temperature acetone gas sensor with fast response and recovery times,high sensitivity,high selectivity,and a low detection limit.However,current acetone gas sensors face challenges in achieving high-selectivity detection at room tempera-ture.This study primarily utilizes self-assembled organic monolayer functionalized MIL-88B to prepare selectivity acetone sensors.The results show that the detection sensitivity of the improved sensor to acetone is significantly improved.Com-pared with the MIL-88B sensor(0.1 ppm),the response value of the MIL-88B@3-aminopropyltrimethoxysilane(APTMS)sensor is increased by about 61.9%.The response to 10 ppm acetone is 83,and the selectivity is greatly improved at room temperature.This can be attributed to the chemical interactions between acetone molecules and APTMS on the sensor sur-face,which improves the sensor's specific recognition ability for acetone.Additionally,the sensor exhibits better stability and shorter response and recovery times.Consequently,the APTMS functionalization of MIL-88B presents an effective method for preparing room-temperature acetone sensors,combining high sensitivity and selectivity,and offering potential for non-invasive disease diagnosis.展开更多
Electrical detection schemes using nanoscale devices offer fast and label-free alternatives to biosensing techniques based on chemical and optical interactions. Here we report on the design, fabrication, and operation...Electrical detection schemes using nanoscale devices offer fast and label-free alternatives to biosensing techniques based on chemical and optical interactions. Here we report on the design, fabrication, and operation of oxide-on-graphene ion-sensitive field effect sensor arrays using large-area graphene sheets synthesized by chemical vapor deposition. In this scheme, HfO2 and SiO2 thin films are deposited atop the graphene sheet and play the dual role of the sensing interface, as well as the passivation layer protecting the channel and electrodes underneath from direct contact with the electrolyte. We further demonstrate the functionalization of the SiO2 surface with 3-aminopropyltrimethoxysilane （APTMS）. The oxide-on-graphene sensors operate in solution with high stability and a high average mobility of 5,000 cm2/（V＇s）. As a proof of principle, we demonstrate pH sensing using the bare or the APTMS-functionalized SiO2 as the sensing surface. The measured sensitivities, 46 mV/pH and 43 mV/pH, respectively, agree well with existing studies. We further show that by applying the solution gate voltage in pulse, the hysteresis in the transfer curve of the graphene transducer can be eliminated, greatly improving the ionic potential resolution of the sensor. These experiments demonstrate the potential of oxide-on-graphene ion-sensitive field effect sensors in on-chip, label-free and real-time biosensing applications.展开更多
文摘A new type of philosophy and mathematics from the pansystems view is introduced here, including the 7 philosophy theories (7PT) and related mathematizing researches. Many second/third philosophies are developed within pansystems framework and related applications to APT MS.
文摘A new type of philosophy and mathematics from the pansytems view is introduced here,including the 7 philosophic theories(7PT)and related mathematic researches.Many second/third philosophies are developed within pansvstems framework and related applications to APTMS.
基金funded by the National Science Foundation of China(U20A20132)the National Key Scientific Research Project(2016YFC0204302)+1 种基金the Dalian Institute of Chemical Physics(DICP I201937)the K.C.Wong Education Foundation。
文摘DAC CO_(2)capture is gaining wide attention as one of the most difficult carbon approaches to tackle climate change.In this work,different pore-size silica spheres were grafted using different amine groups such as APTES,APTMS,and Diamine.Herein,all samples based on the wet and dry grafting method were used for CO_(2)adsorption isotherm at room temperature and pressure(298 K and 1 bar).The sample based on the wet grafting(Silica-APTES-W)sample shows the highest CO_(2)uptake 1.67 mmol/g.Also,the adsorption isotherm of the Silica-APTES-W sample was showed a high capacity of CO_(2)1.2 mmol/g at 25℃,which describes the strong physical interaction between CO_(2)and amine.The isosteric adsorption of Silica-APTES-W also confirmed that the physical adsorption was dominant because of low adsorption heat ranging from 23 to 37 k J/mol.Also,the fixed bed experiment was conducted with 2000 ppm CO_(2)that obtains the optimal working capacity 4.5 m L/g with the lowest regeneration temperature 90℃.It was shown that Silica-APTES-W sample was superior performance for DAC CO_(2)capture in practical applications.
基金supported by the National Natural Science Foundation of China(62104063,61974040)the China Postdoctoral Science Foundation(2021M701055,2022T150188)Key Scientific and Technological Project of Henan Provinces(232102221006).
文摘Acetone detection is crucial for diagnosing diseases such as diabetes and lung cancer.Therefore,it is essential to design a room-temperature acetone gas sensor with fast response and recovery times,high sensitivity,high selectivity,and a low detection limit.However,current acetone gas sensors face challenges in achieving high-selectivity detection at room tempera-ture.This study primarily utilizes self-assembled organic monolayer functionalized MIL-88B to prepare selectivity acetone sensors.The results show that the detection sensitivity of the improved sensor to acetone is significantly improved.Com-pared with the MIL-88B sensor(0.1 ppm),the response value of the MIL-88B@3-aminopropyltrimethoxysilane(APTMS)sensor is increased by about 61.9%.The response to 10 ppm acetone is 83,and the selectivity is greatly improved at room temperature.This can be attributed to the chemical interactions between acetone molecules and APTMS on the sensor sur-face,which improves the sensor's specific recognition ability for acetone.Additionally,the sensor exhibits better stability and shorter response and recovery times.Consequently,the APTMS functionalization of MIL-88B presents an effective method for preparing room-temperature acetone sensors,combining high sensitivity and selectivity,and offering potential for non-invasive disease diagnosis.
文摘Electrical detection schemes using nanoscale devices offer fast and label-free alternatives to biosensing techniques based on chemical and optical interactions. Here we report on the design, fabrication, and operation of oxide-on-graphene ion-sensitive field effect sensor arrays using large-area graphene sheets synthesized by chemical vapor deposition. In this scheme, HfO2 and SiO2 thin films are deposited atop the graphene sheet and play the dual role of the sensing interface, as well as the passivation layer protecting the channel and electrodes underneath from direct contact with the electrolyte. We further demonstrate the functionalization of the SiO2 surface with 3-aminopropyltrimethoxysilane （APTMS）. The oxide-on-graphene sensors operate in solution with high stability and a high average mobility of 5,000 cm2/（V＇s）. As a proof of principle, we demonstrate pH sensing using the bare or the APTMS-functionalized SiO2 as the sensing surface. The measured sensitivities, 46 mV/pH and 43 mV/pH, respectively, agree well with existing studies. We further show that by applying the solution gate voltage in pulse, the hysteresis in the transfer curve of the graphene transducer can be eliminated, greatly improving the ionic potential resolution of the sensor. These experiments demonstrate the potential of oxide-on-graphene ion-sensitive field effect sensors in on-chip, label-free and real-time biosensing applications.
