This nanoprinting process allows researchers to 3D print more material on a biochip than ever before,making it easier to study biomedical issues.Making biochips,a key technology in studying disease,just got a little e...This nanoprinting process allows researchers to 3D print more material on a biochip than ever before,making it easier to study biomedical issues.Making biochips,a key technology in studying disease,just got a little easier.This new nanoprinting process?uses gold-plated pyramids,an LED light,and photochemical reactions to print more organic material on the surface of one single biochip than ever before.The technique uses an array of polymer pyramids that are covered in gold and mounted onto an atomic force mi-展开更多
We developed a new scheme to suppress the electric-field-screening effect in high growth density of a carbon nanotube(CNT) film during its intense pulsed emission.We synthesize the CNT film on a tridimensional surface...We developed a new scheme to suppress the electric-field-screening effect in high growth density of a carbon nanotube(CNT) film during its intense pulsed emission.We synthesize the CNT film on a tridimensional surface(t-CNT film).The tridimensional surface includes wet etched silicon pyramids,and the Ni layer is electroless plated thereon.The intense pulsed emission characteristics of the t-CNT and planar-grown CNT(p-CNT) films were measured using a diode structure in single-pulse mode.The even turn-on field decreased from 5.5 V/μm for p-CNTs to 2.8 V/m for t-CNTs,and the peak emission current increased from 232 A for p-CNTs to 324 A for t-CNTs at a peak field intensity ～12.2 V/m.The peak current of the t-CNT film increased by ～39.7% over the p-CNT film.It is clear that the micro-pyramid array can effectively suppress the field screening effect to improve the electron-emission of CNT films.展开更多
文摘This nanoprinting process allows researchers to 3D print more material on a biochip than ever before,making it easier to study biomedical issues.Making biochips,a key technology in studying disease,just got a little easier.This new nanoprinting process?uses gold-plated pyramids,an LED light,and photochemical reactions to print more organic material on the surface of one single biochip than ever before.The technique uses an array of polymer pyramids that are covered in gold and mounted onto an atomic force mi-
基金supported by the National Natural Science Foundation of China (51072184,50972132,51002143 and 60801022)the Aeronautical Science Foundation of China (2009ZE55003 and 2010ZF55013)the Basic and Advanced Technology Program of Henan (092300410139)
文摘We developed a new scheme to suppress the electric-field-screening effect in high growth density of a carbon nanotube(CNT) film during its intense pulsed emission.We synthesize the CNT film on a tridimensional surface(t-CNT film).The tridimensional surface includes wet etched silicon pyramids,and the Ni layer is electroless plated thereon.The intense pulsed emission characteristics of the t-CNT and planar-grown CNT(p-CNT) films were measured using a diode structure in single-pulse mode.The even turn-on field decreased from 5.5 V/μm for p-CNTs to 2.8 V/m for t-CNTs,and the peak emission current increased from 232 A for p-CNTs to 324 A for t-CNTs at a peak field intensity ～12.2 V/m.The peak current of the t-CNT film increased by ～39.7% over the p-CNT film.It is clear that the micro-pyramid array can effectively suppress the field screening effect to improve the electron-emission of CNT films.
