The advancement of flexible electronics demands improved components,necessitating heat dissipation membranes(HDMs)to exhibit high thermal conductivity while maintaining structural integrity and performance stability e...The advancement of flexible electronics demands improved components,necessitating heat dissipation membranes(HDMs)to exhibit high thermal conductivity while maintaining structural integrity and performance stability even after extensive deformation.Herein,we have devised a laser-modulated reduction technique for graphene oxide(GO),enabling the fabrication of high-quality,large-scale,lowdefect graphene,which yields high-performance HDMs after orderly deposition.The work underscores the crucial role of the laser wavelength and dispersion liquid's coupling intensity in influencing the morphology and properties of graphene.Optimal coupling effect and energy conversion are realized when a laser of 1064 nm wavelength irradiates a triethylene glycol(TEG)/N,N-Dimethylformamide(DMF)dispersion.This unique synergy generates high transient energy,which facilitates the deprotonation process and ensures a swift,comprehensive GO reduction.In contrast to conventional water-based laser reduction methods,the accelerated reaction magnifies the size of the graphene sheets by mitigating the ablation effect.After membrane construction with an ordered structure,the corresponding membrane exhibits a high thermal conductivity of 1632 W m^(-1)K^(-1),requiring only~1/10 of the total preparation time required by other reported methods.Remarkably,the resulting HDM demonstrates superior resilience against creasing and folding,maintaining excellent smoothness and negligible reduction in thermal conductivity after violent rubbing.The combination of exceptional flexibility and thermal conductivity in HDMs paves the way for long-term practical use in the flexible electronics industry.展开更多
It has been a challenge to fully understand the structural characteristics of laser-irradiation induced amorphous(L-a) Ge2Sb2Te5(GST) alloy due to the difficulties of collecting diffraction data from high purity speci...It has been a challenge to fully understand the structural characteristics of laser-irradiation induced amorphous(L-a) Ge2Sb2Te5(GST) alloy due to the difficulties of collecting diffraction data from high purity specimens. In this paper,by fabricating GST thin films on different substrates,we exhibit an effective way of preparing L-a GST dots in submicron scale on various types of specially designed transmission electron microscope(TEM) grids. The structural characteristics of L-a GST in the form of pair distribution functions(PDF) can be achieved on single dots of L-a GST via selected area electron diffraction(SAED) . This general approach would be convenient for precisely producing laser-irradiation induced materials in submicron scale for structural investigation.展开更多
目的观察激光穴位照射联合运动想象疗法治疗脑卒中肢体康复的临床疗效。方法选取2017年6月至2018年10月,脑卒中患者90例,按随机数字表法分为激光组、想象组和联合组,每组患者30例。三组均接受常规康复训练后,激光组仅采用激光穴位照射治...目的观察激光穴位照射联合运动想象疗法治疗脑卒中肢体康复的临床疗效。方法选取2017年6月至2018年10月,脑卒中患者90例,按随机数字表法分为激光组、想象组和联合组,每组患者30例。三组均接受常规康复训练后,激光组仅采用激光穴位照射治疗,波长1064 nm,治疗功率8~10 mW,以百会穴以及患侧的合谷、手三里、肩髃、环跳、足三里为主穴,每个穴位接受光导探针照射5 min;想象组仅采用运动想象疗法治疗;联合组采用激光穴位照射联合运动想象疗法治疗。90例患者接受4周治疗后,分别采用布伦斯特罗姆(Brunnstrom)量表评分和运动功能(Fugl-Meyer Assessment,FMA)评分评估三组患者治疗前后的肢体功能,巴氏指数(Barthel Index,BI)评估患者日常生活能力以及健康调查简表-36(the MOS item short from health survey,SF-36)评估生活质量。结果治疗后4周,三组Brunnstrom和FMA评分均明显高于治疗前(P<0.05);联合组Brunnstrom及FMA评分均高于激光组和想象组(P<0.05);治疗后4周,三组BI指数和SF-36评分均比治疗前提高(P<0.05);联合组BI指数和SF-36评分均高于激光组和想象组(P<0.05)。结论激光穴位照射联合运动想象疗法可明显改善脑卒中患者肢体功能,提高日常生活能力及生活质量,促进患者肢体康复。展开更多
目的评估弱激光血管外照射降低血压、血脂和血糖的疗效。方法采用问卷调查方法,采集全国腕带式弱激光仪使用者的治疗信息,分析用户治疗前后的血压、血脂和血糖变化情况,采用单因素与多重线性回归方法分析弱激光照射降压的影响因素。结...目的评估弱激光血管外照射降低血压、血脂和血糖的疗效。方法采用问卷调查方法,采集全国腕带式弱激光仪使用者的治疗信息,分析用户治疗前后的血压、血脂和血糖变化情况,采用单因素与多重线性回归方法分析弱激光照射降压的影响因素。结果共回收问卷5801份,因缺失值较多,仅将有治疗前后对比数据的调查对象纳入分析,其中,高血压1335例,高血糖180例,血脂异常129例。治疗后仪器使用者的收缩压(SBP)(t=53.16,P<0.001)、舒张压(DBP)(t=34.17,P<0.001)、三酰甘油(TG)(t=7.87,P<0.001)、总胆固醇(TC)(t=8.78,P<0.001)和空腹血糖(FBG)水平(t=11.64,P<0.001)均较使用前明显下降。与基线水平相比,治疗后仪器使用者的SBP、DBP、TG、TC和FBG分别下降了23.3 mm Hg(14.50%)(1 mm Hg=0.133 k Pa)、10.6 mm Hg(11.40%)、0.86 mmol/L(28.70%)、1.11 mmol/L(18.00%)和3.64 mmol/L(34.40%)。不失眠者的DBP下降幅度明显高于失眠者(F=9.54,P=0.00),不饮酒者的DBP下降幅度明显高于饮酒者(F=5.08,P=0.02);男性TG下降幅度明显高于女性(Z=-2.48,P=0.01),有精神压力者的TG下降幅度显著高于无精神压力者(Z=-2.16,P=0.03),吸烟者TG下降幅度明显高于无吸烟用户(Z=-2.17,P=0.03)。所有使用者的中位使用时间为616 d(1~5479 d),以四分位数分为<272 d、272~698 d、699~1435 d和1437 d 4组,其SBP下降幅度分别为(-22.25±16.22)、(-21.59±15.24)、(-24.96±16.82)和(-24.66±15.88)mm Hg,差异有统计学意义(F=3.55,P=0.01)。多元线性回归分析结果显示,性别(β=-0.08,P=0.0178)和仪器使用时间(β=-0.09,P=0.0016)是SBP变化的影响因素;性别(β=-0.10,P=0.0039)、失眠(β=0.09,P=0.0015)和饮酒(β=0.10,P=0.0033)是DBP变化的影响因素。结论长时间弱激光血管外照射有降压、降脂和降糖效果。展开更多
基金supported by the National Science Foundation of Jiangsu Province(BK20210861)the National Natural Science Foundation of China(62101374)the open research fund of Key Laboratory of MEMS of Ministry of Education,Southeast University。
文摘The advancement of flexible electronics demands improved components,necessitating heat dissipation membranes(HDMs)to exhibit high thermal conductivity while maintaining structural integrity and performance stability even after extensive deformation.Herein,we have devised a laser-modulated reduction technique for graphene oxide(GO),enabling the fabrication of high-quality,large-scale,lowdefect graphene,which yields high-performance HDMs after orderly deposition.The work underscores the crucial role of the laser wavelength and dispersion liquid's coupling intensity in influencing the morphology and properties of graphene.Optimal coupling effect and energy conversion are realized when a laser of 1064 nm wavelength irradiates a triethylene glycol(TEG)/N,N-Dimethylformamide(DMF)dispersion.This unique synergy generates high transient energy,which facilitates the deprotonation process and ensures a swift,comprehensive GO reduction.In contrast to conventional water-based laser reduction methods,the accelerated reaction magnifies the size of the graphene sheets by mitigating the ablation effect.After membrane construction with an ordered structure,the corresponding membrane exhibits a high thermal conductivity of 1632 W m^(-1)K^(-1),requiring only~1/10 of the total preparation time required by other reported methods.Remarkably,the resulting HDM demonstrates superior resilience against creasing and folding,maintaining excellent smoothness and negligible reduction in thermal conductivity after violent rubbing.The combination of exceptional flexibility and thermal conductivity in HDMs paves the way for long-term practical use in the flexible electronics industry.
基金supported by the National Basic Research Program of China (Grant Nos.2007CB935400 and 2009CB623700)
文摘It has been a challenge to fully understand the structural characteristics of laser-irradiation induced amorphous(L-a) Ge2Sb2Te5(GST) alloy due to the difficulties of collecting diffraction data from high purity specimens. In this paper,by fabricating GST thin films on different substrates,we exhibit an effective way of preparing L-a GST dots in submicron scale on various types of specially designed transmission electron microscope(TEM) grids. The structural characteristics of L-a GST in the form of pair distribution functions(PDF) can be achieved on single dots of L-a GST via selected area electron diffraction(SAED) . This general approach would be convenient for precisely producing laser-irradiation induced materials in submicron scale for structural investigation.
文摘目的观察激光穴位照射联合运动想象疗法治疗脑卒中肢体康复的临床疗效。方法选取2017年6月至2018年10月,脑卒中患者90例,按随机数字表法分为激光组、想象组和联合组,每组患者30例。三组均接受常规康复训练后,激光组仅采用激光穴位照射治疗,波长1064 nm,治疗功率8~10 mW,以百会穴以及患侧的合谷、手三里、肩髃、环跳、足三里为主穴,每个穴位接受光导探针照射5 min;想象组仅采用运动想象疗法治疗;联合组采用激光穴位照射联合运动想象疗法治疗。90例患者接受4周治疗后,分别采用布伦斯特罗姆(Brunnstrom)量表评分和运动功能(Fugl-Meyer Assessment,FMA)评分评估三组患者治疗前后的肢体功能,巴氏指数(Barthel Index,BI)评估患者日常生活能力以及健康调查简表-36(the MOS item short from health survey,SF-36)评估生活质量。结果治疗后4周,三组Brunnstrom和FMA评分均明显高于治疗前(P<0.05);联合组Brunnstrom及FMA评分均高于激光组和想象组(P<0.05);治疗后4周,三组BI指数和SF-36评分均比治疗前提高(P<0.05);联合组BI指数和SF-36评分均高于激光组和想象组(P<0.05)。结论激光穴位照射联合运动想象疗法可明显改善脑卒中患者肢体功能,提高日常生活能力及生活质量,促进患者肢体康复。
文摘目的评估弱激光血管外照射降低血压、血脂和血糖的疗效。方法采用问卷调查方法,采集全国腕带式弱激光仪使用者的治疗信息,分析用户治疗前后的血压、血脂和血糖变化情况,采用单因素与多重线性回归方法分析弱激光照射降压的影响因素。结果共回收问卷5801份,因缺失值较多,仅将有治疗前后对比数据的调查对象纳入分析,其中,高血压1335例,高血糖180例,血脂异常129例。治疗后仪器使用者的收缩压(SBP)(t=53.16,P<0.001)、舒张压(DBP)(t=34.17,P<0.001)、三酰甘油(TG)(t=7.87,P<0.001)、总胆固醇(TC)(t=8.78,P<0.001)和空腹血糖(FBG)水平(t=11.64,P<0.001)均较使用前明显下降。与基线水平相比,治疗后仪器使用者的SBP、DBP、TG、TC和FBG分别下降了23.3 mm Hg(14.50%)(1 mm Hg=0.133 k Pa)、10.6 mm Hg(11.40%)、0.86 mmol/L(28.70%)、1.11 mmol/L(18.00%)和3.64 mmol/L(34.40%)。不失眠者的DBP下降幅度明显高于失眠者(F=9.54,P=0.00),不饮酒者的DBP下降幅度明显高于饮酒者(F=5.08,P=0.02);男性TG下降幅度明显高于女性(Z=-2.48,P=0.01),有精神压力者的TG下降幅度显著高于无精神压力者(Z=-2.16,P=0.03),吸烟者TG下降幅度明显高于无吸烟用户(Z=-2.17,P=0.03)。所有使用者的中位使用时间为616 d(1~5479 d),以四分位数分为<272 d、272~698 d、699~1435 d和1437 d 4组,其SBP下降幅度分别为(-22.25±16.22)、(-21.59±15.24)、(-24.96±16.82)和(-24.66±15.88)mm Hg,差异有统计学意义(F=3.55,P=0.01)。多元线性回归分析结果显示,性别(β=-0.08,P=0.0178)和仪器使用时间(β=-0.09,P=0.0016)是SBP变化的影响因素;性别(β=-0.10,P=0.0039)、失眠(β=0.09,P=0.0015)和饮酒(β=0.10,P=0.0033)是DBP变化的影响因素。结论长时间弱激光血管外照射有降压、降脂和降糖效果。
