Developing low-power FETs holds significant importance in advancing logic circuits,especially as the feature size of MOSFETs approaches sub-10 nanometers.However,this has been restricted by the thermionic limitation o...Developing low-power FETs holds significant importance in advancing logic circuits,especially as the feature size of MOSFETs approaches sub-10 nanometers.However,this has been restricted by the thermionic limitation of SS,which is limited to 60 mV per decade at room temperature.Herein,we proposed a strategy that utilizes 2D semiconductors with an isolated-band feature as channels to realize subthermionic SS in MOSFETs.Through high-throughput calculations,we established a guiding principle that combines the atomic structure and orbital interaction to identify their sub-thermionic transport potential.This guides us to screen 192 candidates from the 2D material database comprising 1608 systems.Additionally,the physical relationship between the sub-thermionic transport performances and electronic structures is further revealed,which enables us to predict 15 systems with promising device performances for low-power applications with supply voltage below 0.5 V.This work opens a new way for the low-power electronics based on 2D materials and would inspire extensive interests in the experimental exploration of intrinsic steep-slope MOSFETs.展开更多
随着地磁场模型和地磁导航等研究的深入,需要合适的地磁场模型精度评价方法。利用世界地磁场模型(world magnetic model,WMM)和国际地磁台网(INTERMAGNET)观测数据,研究了最新的WMM2010模型在全球范围内的精度,并分析了WMM在欧洲、北美...随着地磁场模型和地磁导航等研究的深入,需要合适的地磁场模型精度评价方法。利用世界地磁场模型(world magnetic model,WMM)和国际地磁台网(INTERMAGNET)观测数据,研究了最新的WMM2010模型在全球范围内的精度,并分析了WMM在欧洲、北美洲、中国及邻近地区等不同局部区域的精度。根据地磁场模型球谐系数截断阶数与空间最小分辨率波长关系,提出用格网化方法来评价地磁场模型的精度,并给出了WMM在全球和局部地区的精度。展开更多
目的肿瘤生长的微环境影响其生物学行为,乳腺癌中肿瘤浸润淋巴细胞(tumor infiltrating lymphocytes,TILs)的评估与临床关系日益密切。本研究探讨非特殊型浸润性乳腺癌(invasive breast carcinoma of no specific type,IBC-NST)与伴髓...目的肿瘤生长的微环境影响其生物学行为,乳腺癌中肿瘤浸润淋巴细胞(tumor infiltrating lymphocytes,TILs)的评估与临床关系日益密切。本研究探讨非特殊型浸润性乳腺癌(invasive breast carcinoma of no specific type,IBC-NST)与伴髓样特征癌中,TILs、白细胞介素-2(interleukin-2,IL-2)和淋巴毒素α(lymphotoxinα,LTα)表达差异及与预后的关系。方法选取河北医科大学第四医院2006-01-01-2010-12-30原发性乳腺癌手术切除标本242例,其中IBC-NST 152例,伴髓样特征癌90例。采用免疫组化HRP法检测两种乳腺癌中T淋巴细胞及其亚群、B淋巴细胞、自然杀伤细胞(natural killer cell,NK)和细胞因子表达及与预后的关系。结果与伴髓样特征癌组相比,IBC-NST组淋巴结转移率和脉管瘤栓阳性率均较高,临床分期较晚,差异有统计学意义,P<0.05。CD3、CD4、CD8、CD20、CD57及细胞因子IL-2、LTα,在伴髓样特征癌组的表达均高于IBC-NST组,均P<0.001。伴髓样特征癌组TILs表达为CD3表达最高,CD20细胞次之,CD57细胞表达最低,均P<0.05;且伴髓样特征癌组中CD8表达高于CD4,P<0.001。细胞因子IL-2和LTα在伴髓样特征癌组阳性率分别为87.8%和88.9%,高于IBC-NST组的68.4%和85.5%,均P<0.001。伴髓样特征癌组患者5年生存率为95.6%,高于IBC-NST组的87.4%,P=0.038。CD8与伴髓样特征癌组预后呈正相关,P<0.05。结论与IBC-NST相比,伴髓样特征癌中浸润性T、B、NK淋巴细胞较多且是其预后较好重要原因之一,其中T细胞特别是CD8+T细胞发挥了重要作用。展开更多
基金supported by the Postgraduate Research&Practice Innovation Program of Jiangsu Province(KYCX22_0428)the Training Program of the Major Research Plan of the National Natural Science Foundation of China(91964103)+3 种基金the Natural Science Foundation of Jiangsu Province(BK20180071)the Fundamental Research Funds for the Central Universities(30919011109)sponsored by Qing Lan Project of Jiangsu Province,and the Six Talent Peaks Project of Jiangsu Province(XCL-035)Research Grant Council of Hong Kong(CRS_PolyU502/22).
文摘Developing low-power FETs holds significant importance in advancing logic circuits,especially as the feature size of MOSFETs approaches sub-10 nanometers.However,this has been restricted by the thermionic limitation of SS,which is limited to 60 mV per decade at room temperature.Herein,we proposed a strategy that utilizes 2D semiconductors with an isolated-band feature as channels to realize subthermionic SS in MOSFETs.Through high-throughput calculations,we established a guiding principle that combines the atomic structure and orbital interaction to identify their sub-thermionic transport potential.This guides us to screen 192 candidates from the 2D material database comprising 1608 systems.Additionally,the physical relationship between the sub-thermionic transport performances and electronic structures is further revealed,which enables us to predict 15 systems with promising device performances for low-power applications with supply voltage below 0.5 V.This work opens a new way for the low-power electronics based on 2D materials and would inspire extensive interests in the experimental exploration of intrinsic steep-slope MOSFETs.
文摘随着地磁场模型和地磁导航等研究的深入,需要合适的地磁场模型精度评价方法。利用世界地磁场模型(world magnetic model,WMM)和国际地磁台网(INTERMAGNET)观测数据,研究了最新的WMM2010模型在全球范围内的精度,并分析了WMM在欧洲、北美洲、中国及邻近地区等不同局部区域的精度。根据地磁场模型球谐系数截断阶数与空间最小分辨率波长关系,提出用格网化方法来评价地磁场模型的精度,并给出了WMM在全球和局部地区的精度。
文摘目的肿瘤生长的微环境影响其生物学行为,乳腺癌中肿瘤浸润淋巴细胞(tumor infiltrating lymphocytes,TILs)的评估与临床关系日益密切。本研究探讨非特殊型浸润性乳腺癌(invasive breast carcinoma of no specific type,IBC-NST)与伴髓样特征癌中,TILs、白细胞介素-2(interleukin-2,IL-2)和淋巴毒素α(lymphotoxinα,LTα)表达差异及与预后的关系。方法选取河北医科大学第四医院2006-01-01-2010-12-30原发性乳腺癌手术切除标本242例,其中IBC-NST 152例,伴髓样特征癌90例。采用免疫组化HRP法检测两种乳腺癌中T淋巴细胞及其亚群、B淋巴细胞、自然杀伤细胞(natural killer cell,NK)和细胞因子表达及与预后的关系。结果与伴髓样特征癌组相比,IBC-NST组淋巴结转移率和脉管瘤栓阳性率均较高,临床分期较晚,差异有统计学意义,P<0.05。CD3、CD4、CD8、CD20、CD57及细胞因子IL-2、LTα,在伴髓样特征癌组的表达均高于IBC-NST组,均P<0.001。伴髓样特征癌组TILs表达为CD3表达最高,CD20细胞次之,CD57细胞表达最低,均P<0.05;且伴髓样特征癌组中CD8表达高于CD4,P<0.001。细胞因子IL-2和LTα在伴髓样特征癌组阳性率分别为87.8%和88.9%,高于IBC-NST组的68.4%和85.5%,均P<0.001。伴髓样特征癌组患者5年生存率为95.6%,高于IBC-NST组的87.4%,P=0.038。CD8与伴髓样特征癌组预后呈正相关,P<0.05。结论与IBC-NST相比,伴髓样特征癌中浸润性T、B、NK淋巴细胞较多且是其预后较好重要原因之一,其中T细胞特别是CD8+T细胞发挥了重要作用。
