利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

60 条记录 (耗时 0.022 秒)

    METHOD FOR PRODUCING FEW-LAYER GRAPHENE
    1.
    发明申请
    METHOD FOR PRODUCING FEW-LAYER GRAPHENE 审中-公开
    生产薄层石墨的方法

    公开(公告)号：US20150376013A1

    公开(公告)日：2015-12-31

    申请号：US14654215

    申请日：2013-12-20

    申请人： Aiping YU ,  Victor CHABOT ,  Zhongwei CHEN

    发明人： Aiping Yu ,  Victor Chabot ,  Zhongwei Chen

    IPC分类号： C01B31/04

    CPC分类号： C01B31/0469 ,  C01B32/19 ,  C01B2204/02 ,  C01B2204/04

    摘要： A method of producing single or few-layer graphene comprises exfoliating graphite with a polymer to form a graphene-polymer composite and subsequently treating the composite to disassociate graphene. The exfoliation process is conducted using sonication. The graphene is disassociated from the polymer by a treatment step such as acid hydrolysis. The method results in highly pure graphene.

    摘要翻译： 生产单层或几层石墨烯的方法包括用聚合物去除石墨以形成石墨烯 - 聚合物复合材料，随后处理复合材料以分离石墨烯。 剥离过程使用超声处理进行。 石墨烯通过诸如酸水解的处理步骤与聚合物分离。 该方法产生高纯度石墨烯。

    Method for producing few-layer graphene
    2.
    发明授权
    Method for producing few-layer graphene 有权
    生产少层石墨烯的方法

    公开(公告)号：US09527745B2

    公开(公告)日：2016-12-27

    申请号：US14654215

    申请日：2013-12-20

    申请人： Aiping Yu ,  Victor Chabot ,  Zhongwei Chen

    发明人： Aiping Yu ,  Victor Chabot ,  Zhongwei Chen

    IPC分类号： C01B31/04

    CPC分类号： C01B31/0469 ,  C01B32/19 ,  C01B2204/02 ,  C01B2204/04

    摘要： A method of producing single or few-layer graphene comprises exfoliating graphite with a polymer to form a graphene-polymer composite and subsequently treating the composite to disassociate graphene. The exfoliation process is conducted using sonication. The graphene is disassociated from the polymer by a treatment step such as acid hydrolysis. The method results in highly pure graphene.

    摘要翻译： 生产单层或几层石墨烯的方法包括用聚合物去除石墨以形成石墨烯 - 聚合物复合材料，随后处理复合材料以分离石墨烯。 剥离过程使用超声处理进行。 石墨烯通过诸如酸水解的处理步骤与聚合物分离。 该方法产生高纯度石墨烯。

    Platinum and platinum based alloy nanotubes as electrocatalysts for fuel cells
    9.
    发明授权
    Platinum and platinum based alloy nanotubes as electrocatalysts for fuel cells 有权
    铂和铂基合金纳米管作为燃料电池的电催化剂

    公开(公告)号：US09214680B2

    公开(公告)日：2015-12-15

    申请号：US12224197

    申请日：2007-02-24

    申请人： Yan Yushan ,  Zhongwei Chen

    发明人： Yan Yushan ,  Zhongwei Chen

    IPC分类号： B01J23/56 ,  H01M4/92 ,  C22C5/04 ,  H01M4/88 ,  H01M8/10

    CPC分类号： H01M4/92 ,  C22C5/04 ,  H01M4/8814 ,  H01M4/921 ,  H01M4/928 ,  H01M2008/1095 ,  Y02E60/50 ,  Y02E60/523

    摘要： Electrocatalyst durability has been recently recognized as one of the most important issues that have to be addressed before the commercialization of the proton exchange membrane fuel cells (PEMFCs). The present invention is directed to a new class of cathode catalysts based on supportless platinum nanotubes (PtNTs) and platinum alloy nanotubes, for example, platinum-palladium nanotubes (PtPdNTs), that have remarkable durability and high catalytic activity. Due to their unique combination of dimensions at multiple length scales, the platinum nanotubes of the present invention can provide high platinum surface area due to their nanometer-sized wall thickness, and have the potential to eliminate or alleviate most of the degradation pathways of the commercial carbon supported platinum catalyst (Pt/C) and unsupported platinum-black (PtB) as a result of their micrometer-sized length. The platinum nanotube catalysts of the present invention asymptotically approach a maximum of about twenty percent platinum surface area loss in durability test, while the commercial PtB and Pt/C catalysts lose about fifty-one percent and ninety percent of their initial surface area, respectively. Moreover, the PtNT and PtPdNT catalysts of the present invention show higher mass activity and much higher specific activity than commercial Pt/C and PtB catalysts.

    摘要翻译： 电催化剂耐久性最近被认为是在质子交换膜燃料电池（PEMFC）商业化之前必须解决的最重要的问题之一。 本发明涉及一类新型的基于无支撑铂纳米管（PtNTs）和铂合金纳米管（例如铂 - 钯纳米管（PtPdNTs））的阴极催化剂，其具有显着的耐久性和高催化活性。 由于它们在多个长度尺度上的独特的尺寸组合，本发明的铂纳米管由于其纳米尺寸的壁厚可以提供高的铂表面积，并且具有消除或减轻商业的大部分降解途径的潜力 碳负载的铂催化剂（Pt / C）和无支撑的铂黑（PtB），由于其微米尺寸的长度。 本发明的铂纳米管催化剂在耐久性试验中渐近地接近约百分之二十的铂表面积损失，而商业PtB和Pt / C催化剂分别损失其初始表面积的百分之五十一和百分之九十。 此外，本发明的PtNT和PtPdNT催化剂显示比商业Pt / C和PtB催化剂更高的质量活性和更高的比活性。

    Movable detector for charged particle beam inspection or review
    10.
    发明授权
    Movable detector for charged particle beam inspection or review 有权
    用于带电粒子束检测或检查的可移动检测器

    公开(公告)号：US08624186B2

    公开(公告)日：2014-01-07

    申请号：US12787139

    申请日：2010-05-25

    申请人： Yi-Xiang Wang ,  Joe Wang ,  Xuedong Liu ,  Zhongwei Chen

    发明人： Yi-Xiang Wang ,  Joe Wang ,  Xuedong Liu ,  Zhongwei Chen

    IPC分类号： H01J37/244

    CPC分类号： H01J37/244 ,  H01J37/28 ,  H01J2237/024 ,  H01J2237/24465 ,  H01J2237/24475 ,  H01J2237/2448 ,  H01J2237/24495 ,  H01J2237/2611 ,  H01J2237/2817

    摘要： The present invention generally relates to a detection unit of a charged particle imaging system. More particularly, portion of the detection unit can move into or out of the detection system as imaging condition required. With the assistance of a Wein filter (also known as an E×B charged particle analyzer) and a movable detector design, the present invention provides a stereo imaging system that suitable for both low current, high resolution mode and high current, high throughput mode. Merely by way of example, the invention has been applied to a scanning electron beam inspection system. But it would be recognized that the invention could apply to other system using charged particle beam as an observation tool.

    摘要翻译： 本发明一般涉及带电粒子成像系统的检测单元。 更具体地，检测单元的一部分可以作为所需的成像条件移入或移出检测系统。 在Wein滤波器（也称为E×B带电粒子分析仪）和可移动检测器设计的帮助下，本发明提供了一种适用于低电流，高分辨率模式和高电流，高通量模式的立体成像系统 。 仅作为示例，本发明已经应用于扫描电子束检查系统。 但是应当认识到，本发明可以应用于使用带电粒子束作为观测工具的其它系统。