World trade growth slid to 5.5 per- cent last year from 8.5 percent in 2006 and may grow even more slowly in 2008-at about 4.5 percent-as sharp economic deceleration in key developed countries is only partly offset by...World trade growth slid to 5.5 per- cent last year from 8.5 percent in 2006 and may grow even more slowly in 2008-at about 4.5 percent-as sharp economic deceleration in key developed countries is only partly offset by continuing strong growth in emerging economies。展开更多
Organic field-effect transistors（OFETs） offer great potential applications in chemical and biological sensing for homeland security,environmental monitoring,industry manufacturing,and medical/biological detection. M...Organic field-effect transistors（OFETs） offer great potential applications in chemical and biological sensing for homeland security,environmental monitoring,industry manufacturing,and medical/biological detection. Many studies concentrate on sensitivity and selectivity improvement of OFET-based sensors. We report four organic semiconductors with different alkyl side chain lengths but the same π-conjugated core structure for OFETs. Our work focuses on the molecular structure of organic semiconductors（OSCs）. Alkyl side chains can hinder the diffusion of ammonia into the OSCs layer,which blocks the interaction between ammonia and conducting channel. The result also reveals the relationship between the alky chain and the film thickness in sensitivity control. These results are expected to be a guide to the molecular design of organic semiconductors and the choice of OSCs.展开更多
文摘World trade growth slid to 5.5 per- cent last year from 8.5 percent in 2006 and may grow even more slowly in 2008-at about 4.5 percent-as sharp economic deceleration in key developed countries is only partly offset by continuing strong growth in emerging economies。
基金financially supported by the National Natural Science Foundation of China(21302142 and 51603151)the National Key Research and Development Program of China(2017YFA0103900 and 2017YFA0103904)+1 种基金the 1000 Youth Talent Planthe Fundamental Research Funds for the Central Universities of China
文摘Organic field-effect transistors（OFETs） offer great potential applications in chemical and biological sensing for homeland security,environmental monitoring,industry manufacturing,and medical/biological detection. Many studies concentrate on sensitivity and selectivity improvement of OFET-based sensors. We report four organic semiconductors with different alkyl side chain lengths but the same π-conjugated core structure for OFETs. Our work focuses on the molecular structure of organic semiconductors（OSCs）. Alkyl side chains can hinder the diffusion of ammonia into the OSCs layer,which blocks the interaction between ammonia and conducting channel. The result also reveals the relationship between the alky chain and the film thickness in sensitivity control. These results are expected to be a guide to the molecular design of organic semiconductors and the choice of OSCs.
