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    • 8. 发明申请
    • Vertically aligned nanostructure scanning probe microscope tips
    • 垂直取向的纳米结构扫描探针显微镜技巧
    • US20050103993A1
    • 2005-05-19
    • US10716770
    • 2003-11-19
    • Michael GuillornBojan IlicAnatoli MelechkoVladimir MerkulovDouglas LowndesMichael Simpson
    • Michael GuillornBojan IlicAnatoli MelechkoVladimir MerkulovDouglas LowndesMichael Simpson
    • G01Q70/12G01Q70/16G12B21/02
    • G01Q70/16G01Q70/12
    • Methods and apparatus are described for cantilever structures that include a vertically aligned nanostructure, especially vertically aligned carbon nanofiber scanning probe microscope tips. A method includes A method, includes fabricating a cantilever structure having a vertically aligned nanostructure including: forming a doped layer at a first side of a substrate; depositing an etch mask layer on a second side of the substrate; forming a plurality of alignment marks that are coupled to the first side of the substrate; depositing a catalyst nanoparticle at a deterministic site that is coupled to the doped layer; growing the vertically aligned nanostructure at the deterministic site with the catalyst nanoparticle; depositing a first protective layer that surrounds at least a portion of the vertically aligned nanostructure; patterning the first protective layer to define an outline of a cantilever body; transferring the outline of the cantilever body from the first protective layer into the doped layer to form the cantilever body from the doped layer; depositing a second protective layer that coats at least a portion of a surface of the cantilever body; patterning the etch mask layer to define an outline of a relieved volume; transferring the outline of the relieved volume from the etch mask layer into the second side of the substrate to remove the relieved volume from the substrate, where the cantilever body is not removed.
    • 描述了包括垂直排列的纳米结构,特别是垂直排列的碳纳米纤维扫描探针显微镜尖端的悬臂结构的方法和装置。 一种方法包括一种方法,包括制造具有垂直排列的纳米结构的悬臂结构,包括:在衬底的第一侧形成掺杂层; 在所述衬底的第二侧上沉积蚀刻掩模层; 形成耦合到所述基板的第一侧的多个对准标记; 在耦合到掺杂层的确定性位点沉积催化剂纳米颗粒; 用催化剂纳米颗粒在确定性位点生长垂直排列的纳米结构; 沉积围绕所述垂直排列的纳米结构的至少一部分的第一保护层; 图案化第一保护层以限定悬臂体的轮廓; 将悬臂体的轮廓从第一保护层转移到掺杂层中以从掺杂层形成悬臂体; 沉积涂覆悬臂体表面的至少一部分的第二保护层; 图案化蚀刻掩模层以限定释放体积的轮廓; 将缓冲体积的轮廓从蚀刻掩模层转移到衬底的第二侧,以从衬底移除释放体积,其中悬臂体不被去除。
    • 9. 发明授权
    • Microtensiometer sensor, probe and method of use
    • 微量计传感器,探头和使用方法
    • US08695407B2
    • 2014-04-15
    • US13264964
    • 2010-04-16
    • Abraham D. StroockAlan N. LaksoVinay PagayBojan IlicMeredith Metzler
    • Abraham D. StroockAlan N. LaksoVinay PagayBojan IlicMeredith Metzler
    • G01N19/10A01G27/00
    • G01N13/02G01N33/0098G01N2013/0275Y10T137/189
    • A microtensiometer sensor includes a substrate layer fluidly coupled to an enclosed reservoir. A porous membrane is disposed on a surface of the substrate layer. The membrane defines a liquid side fluidly coupled to the reservoir and a vapor side fluidly coupled to a vapor interface. The porous membrane includes a plurality of through holes fluidly coupling the liquid reservoir to the vapor interface, and a nanoporous filler material disposed within the plurality of through holes. The filler material includes a plurality of open pores having a maximum diameter in the range of 0.2 to 200 nanometers. In one embodiment, the microtensiometer sensor includes a molecular membrane disposed adjacent to the vapor side of the porous membrane. In one example, the molecular membrane is formed of a highly crystalline polytetrafluoroethylene polymer having a microstructure characterized by nodes interconnected by fibrils. In one application, the microtensiometer sensor may be used in a probe to measure the average water potential within a network of plant or tree xylem. In another application, the microtensiometer sensor may be useful in real-time determination of the water potential in soil.
    • 微量计传感器包括流体耦合到封闭储存器的基底层。 多孔膜设置在基底层的表面上。 膜限定液体侧流体耦合到储存器和蒸气侧,其流体地耦合到蒸汽界面。 多孔膜包括将液体储存器流体耦合到蒸汽界面的多个通孔,以及设置在多个通孔内的纳米孔填料。 填充材料包括多个开孔,其最大直径在0.2至200纳米的范围内。 在一个实施例中,微量计传感器包括邻近多孔膜的蒸汽侧设置的分子膜。 在一个实例中,分子膜由具有微结构特征的高度结晶的聚四氟乙烯聚合物形成,其中纤维通过原纤维相互连接。 在一个应用中,微量计传感器可用于探针中以测量植物或树木质部分网络内的平均水势。 在另一个应用中,微量计传感器可用于实时测定土壤中的水势。