P-type semiconductor zinc oxide films process for preparation thereof, and pulsed laser deposition method using transparent substrates
    21.
    发明申请
    P-type semiconductor zinc oxide films process for preparation thereof, and pulsed laser deposition method using transparent substrates 失效
    P型半导体氧化锌膜的制造方法以及使用透明基板的脉冲激光沉积法

    公开(公告)号:US20070243328A1

    公开(公告)日:2007-10-18

    申请号:US11405020

    申请日:2006-04-17

    CPC classification number: C23C14/22 C23C14/083 C23C14/28

    Abstract: A p-type semiconductor zinc oxide (ZnO) film and a process for preparing the film are disclosed. The film is co-doped with phosphorous (P) and lithium (Li). A pulsed laser deposition scheme is described for use in growing the film. Further described is a process of pulsed laser deposition using transparent substrates which includes a pulsed laser source, a substrate that is transparent at the wavelength of the pulsed laser, and a multi-target system. The optical path of the pulsed laser is arranged in such a way that the pulsed laser is incident from the back of the substrate, passes through the substrate, and then focuses on the target. By translating the substrate towards the target, this geometric arrangement enables deposition of small features utilizing the root of the ablation plume, which can exist in a one-dimensional transition stage along the target surface normal, before the angular width of the plume is broadened by three-dimensional adiabatic expansion. This can provide small deposition feature sizes, which can be similar in size to the laser focal spot, and provides a novel method for direct deposition of patterned materials.

    Abstract translation: 公开了一种p型半导体氧化锌(ZnO)膜及其制备方法。 该膜与磷(P)和锂(Li)共掺杂。 描述脉冲激光沉积方案用于生长膜。 进一步描述的是使用透明衬底的脉冲激光沉积过程,其包括脉冲激光源,在脉冲激光的波长处是透明的衬底和多目标系统。 脉冲激光器的光路布置成使得脉冲激光从衬底的背面入射,穿过衬底,然后聚焦在靶上。 通过将基板朝向目标平移,这种几何布置可以在羽流的角宽度扩大之前利用消融羽流的根部沉积小特征,其可以沿着目标表面法线存在于一维过渡阶段中 三维绝热膨胀。 这可以提供小的沉积特征尺寸,其尺寸可以与激光焦点类似,并且提供用于直接沉积图案化材料的新颖方法。

    Stable colloidal gold nanoparticles with controllable surface modification and functionalization
    23.
    发明授权
    Stable colloidal gold nanoparticles with controllable surface modification and functionalization 有权
    稳定的胶体金纳米粒子具有可控的表面改性和功能化

    公开(公告)号:US08697129B2

    公开(公告)日:2014-04-15

    申请号:US13038788

    申请日:2011-03-02

    Abstract: In the present invention, a method of producing stable bare colloidal gold nanoparticles is disclosed. The nanoparticles can subsequently be subjected to partial or full surface modification. The method comprises preparation of colloidal gold nanoparticles in a liquid by employing a top-down nanofabrication method using bulk gold as a source material. The surface modification of these nanoparticles is carried out by adding one or multiple types of ligands each containing functional groups which exhibit affinity for gold nanoparticle surfaces to produce the conjugates. Because of the high efficiency and excellent stability of the nanoparticles produced by this method, the fabricated gold nanoparticle conjugates can have surface coverage with functional ligands which can be tuned to be any percent value between 0 and 100%.

    Abstract translation: 在本发明中,公开了一种制备稳定的裸胶体金纳米颗粒的方法。 随后可以对纳米颗粒进行部分或全面修饰。 该方法包括使用以大块金为原料的自顶向下纳米制造方法在液体中制备胶体金纳米颗粒。 这些纳米颗粒的表面改性是通过添加一种或多种类型的配体,每个配体包含对金纳米颗粒表面具有亲和性以产生共轭物的官能团。 由于通过该方法制备的纳米颗粒的高效率和优异的稳定性,所制备的金纳米颗粒共轭物可以具有表面覆盖的功能性配体,其可被调整为0至100%之间的任何百分比值。

    Non-vacuum method for fabrication of a photovoltaic absorber layer
    24.
    发明授权
    Non-vacuum method for fabrication of a photovoltaic absorber layer 失效
    用于制造光伏吸收层的非真空方法

    公开(公告)号:US08409906B2

    公开(公告)日:2013-04-02

    申请号:US12910929

    申请日:2010-10-25

    Abstract: The present invention provides a non-vacuum method of depositing a photovoltaic absorber layer based on electrophoretic deposition of a mixture of nanoparticles with a controlled atomic ratio between the elements. The nanoparticles are first dispersed in a liquid medium to form a colloidal suspension and then electrophoretically deposited onto a substrate to form a thin film photovoltaic absorber layer. The absorber layer may be subjected to optional post-deposition treatments for photovoltaic absorption.

    Abstract translation: 本发明提供了一种非真空方法,其基于在元件之间具有受控原子比的纳米颗粒的混合物的电泳沉积来沉积光伏吸收层。 首先将纳米颗粒分散在液体介质中以形成胶体悬浮液,然后电泳沉积到基底上以形成薄膜光伏吸收层。 可以对吸收层进行用于光伏吸收的任选的后沉积处理。

    Production of metal and metal-alloy nanoparticles with high repetition rate ultrafast pulsed laser ablation in liquids
    25.
    发明授权
    Production of metal and metal-alloy nanoparticles with high repetition rate ultrafast pulsed laser ablation in liquids 有权
    在液体中生产金属和金属合金纳米粒子,具有高重复率超快脉冲激光烧蚀

    公开(公告)号:US08246714B2

    公开(公告)日:2012-08-21

    申请号:US12320617

    申请日:2009-01-30

    Abstract: Various embodiments include a method of producing chemically pure and stably dispersed metal and metal-alloy nanoparticle colloids with ultrafast pulsed laser ablation. A method comprises irradiating a metal or metal alloy target submerged in a liquid with ultrashort laser pulses at a high repetition rate, cooling a portion of the liquid that includes an irradiated region, and collecting nanoparticles produced with the laser irradiation and liquid cooling. The method may be implemented with a high repetition rate ultrafast pulsed laser source, an optical system for focusing and moving the pulsed laser beams, a metal or metal alloy target submerged in a liquid, and a liquid circulating system to cool the laser focal volume and collect the nanoparticle products. By controlling various laser parameters, and with optional liquid flow movement, the method provides stable colloids of dispersed metal and metal-alloy nanoparticles. In various embodiments additional stabilizing chemical agents are not required.

    Abstract translation: 各种实施方案包括用超快速脉冲激光烧蚀制备化学纯的和稳定分散的金属和金属合金纳米颗粒胶体的方法。 一种方法包括以高重复率以超短激光脉冲辐射淹没在液体中的金属或金属合金靶,冷却包括辐射区域的液体的一部分,以及收集通过激光照射和液体冷却产生的纳米颗粒。 该方法可以用高重复率超快脉冲激光源,用于聚焦和移动脉冲激光束的光学系统,浸没在液体中的金属或金属合金靶和液体循环系统来实现,以冷却激光聚焦体积, 收集纳米颗粒产品。 通过控制各种激光参数,并具有可选的液流运动,该方法提供分散金属和金属合金纳米粒子的稳定胶体。 在各种实施方案中,不需要另外的稳定化学试剂。

    Production of metal and metal-alloy nanoparticles with high repetition rate ultrafast pulsed laser ablation in liquids
    26.
    发明申请
    Production of metal and metal-alloy nanoparticles with high repetition rate ultrafast pulsed laser ablation in liquids 有权
    在液体中生产金属和金属合金纳米粒子,具有高重复率超快脉冲激光烧蚀

    公开(公告)号:US20100196192A1

    公开(公告)日:2010-08-05

    申请号:US12320617

    申请日:2009-01-30

    Abstract: Various embodiments include a method of producing chemically pure and stably dispersed metal and metal-alloy nanoparticle colloids with ultrafast pulsed laser ablation. A method comprises irradiating a metal or metal alloy target submerged in a liquid with ultrashort laser pulses at a high repetition rate, cooling a portion of the liquid that includes an irradiated region, and collecting nanoparticles produced with the laser irradiation and liquid cooling. The method may be implemented with a high repetition rate ultrafast pulsed laser source, an optical system for focusing and moving the pulsed laser beams, a metal or metal alloy target submerged in a liquid, and a liquid circulating system to cool the laser focal volume and collect the nanoparticle products. By controlling various laser parameters, and with optional liquid flow movement, the method provides stable colloids of dispersed metal and metal-alloy nanoparticles. In various embodiments additional stabilizing chemical agents are not required.

    Abstract translation: 各种实施方案包括用超快速脉冲激光烧蚀制备化学纯的和稳定分散的金属和金属合金纳米颗粒胶体的方法。 一种方法包括以高重复率以超短激光脉冲辐射淹没在液体中的金属或金属合金靶,冷却包括辐射区域的液体的一部分,以及收集通过激光照射和液体冷却产生的纳米颗粒。 该方法可以用高重复率超快脉冲激光源,用于聚焦和移动脉冲激光束的光学系统,浸没在液体中的金属或金属合金靶和液体循环系统来实现,以冷却激光聚焦体积, 收集纳米颗粒产品。 通过控制各种激光参数,并具有可选的液流运动,该方法提供分散金属和金属合金纳米粒子的稳定胶体。 在各种实施方案中,不需要另外的稳定化学试剂。

    METHOD FOR DEPOSITING CRYSTALLINE TITANIA NANOPARTICLES AND FILMS
    27.
    发明申请
    METHOD FOR DEPOSITING CRYSTALLINE TITANIA NANOPARTICLES AND FILMS 有权
    沉积钛铁氧体纳米颗粒和膜的方法

    公开(公告)号:US20090311513A1

    公开(公告)日:2009-12-17

    申请号:US12497205

    申请日:2009-07-02

    CPC classification number: C30B23/08 C23C14/083 C23C14/28 C30B29/16

    Abstract: A one-step and room-temperature process for depositing nanoparticles or nanocomposite (nanoparticle-assembled) films of metal oxides such as crystalline titanium dioxide (TiO2) onto a substrate surface using ultrafast pulsed laser ablation of Titania or metal titanium target. The system includes a pulsed laser with a pulse duration ranging from a few femtoseconds to a few tens of picoseconds, an optical setup for processing the laser beam such that the beam is focused onto the target surface with an appropriate average energy density and an appropriate energy density distribution, and a vacuum chamber in which the target and the substrate are installed and background gases and their pressures are appropriately adjusted.

    Abstract translation: 使用二氧化钛或金属钛靶的超快速脉冲激光烧蚀将金属氧化物如结晶二氧化钛(TiO 2)的纳米颗粒或纳米复合材料(纳米颗粒组装的)膜沉积到基底表面上的一步和室温方法。 该系统包括脉冲激光,其脉冲持续时间范围从几飞秒到几十皮秒,用于处理激光束的光学设置,使得光束以适当的平均能量密度和适当的能量聚焦到目标表面上 密度分布,以及真空室,其中安装了目标物和基质,背景气体及其压力被适当调节。

    Method For Fabricating Thin Films
    28.
    发明申请
    Method For Fabricating Thin Films 审中-公开
    薄膜制造方法

    公开(公告)号:US20090246530A1

    公开(公告)日:2009-10-01

    申请号:US12401967

    申请日:2009-03-11

    Abstract: A method of pulsed laser deposition (PLD) capable of continuously tuning formed-film morphology from that of a nanoparticle aggregate to a smooth thin film free of particles and droplets. The materials that can be synthesized using various embodiments of the invention include, but are not limited to, metals, alloys, metal oxides, and semiconductors. In various embodiments a ‘burst’ mode of ultrashort pulsed laser ablation and deposition is provided. Tuning of the film morphology is achieved by controlling the burst-mode parameters such as the number of pulses and the time-spacing between the pulses within each burst, the burst repetition rate, and the laser fluence. The system includes an ultrashort pulsed laser, an optical system for delivering a focused onto the target surface with an appropriate energy density, and a vacuum chamber in which the target and the substrate are installed and background gases and their pressures are appropriately adjusted.

    Abstract translation: 脉冲激光沉积(PLD)的方法,其能够将形成膜的形态从纳米颗粒聚集体的形态连续调节到没有颗粒和液滴的平滑薄膜。 可以使用本发明的各种实施方案合成的材料包括但不限于金属,合金,金属氧化物和半导体。 在各种实施例中,提供了超短脉冲激光烧蚀和沉积的“突发”模式。 通过控制脉冲串模式参数,例如脉冲数和每个脉冲之间的脉冲之间的时间间隔,脉冲串重复频率和激光能量密度来实现电影形态的调整。 该系统包括超短脉冲激光器,用于以适当的能量密度传递聚焦到目标表面上的光学系统,以及真空室,其中靶和基底被安装在其中,背景气体及其压力被适当地调整。

    Method for depositing crystalline titania nanoparticles and films
    29.
    发明申请
    Method for depositing crystalline titania nanoparticles and films 审中-公开
    沉积结晶二氧化钛纳米粒子和薄膜的方法

    公开(公告)号:US20080187684A1

    公开(公告)日:2008-08-07

    申请号:US11798114

    申请日:2007-05-10

    CPC classification number: C30B23/08 C23C14/083 C23C14/28 C30B29/16

    Abstract: The present invention provides a one-step and room-temperature process for depositing nanoparticles or nanocomposite (nanoparticle-assembled) films of crystalline titanium dioxide (TiO2) onto a substrate surface using ultrafast pulsed laser ablation of Titania or metal titanium target. The system includes a pulsed laser with a pulse duration ranging from a few femtoseconds to a few tens of picoseconds, an optical setup for processing the laser beam such that the beam is focused onto the target surface with an appropriate average energy density and an appropriate energy density distribution, and a vacuum chamber in which the target and the substrate are installed and background gases and their pressures are appropriately adjusted.

    Abstract translation: 本发明提供一步和室温方法,用于使用Titania的超快速脉冲激光烧蚀将结晶二氧化钛(TiO 2)的纳米颗粒或纳米复合材料(纳米颗粒组装的)膜沉积到基底表面上 或金属钛靶。 该系统包括脉冲激光,其脉冲持续时间范围从几飞秒到几十皮秒,用于处理激光束的光学设置,使得光束以适当的平均能量密度和适当的能量聚焦到目标表面上 密度分布,以及真空室,其中安装了目标物和基质,背景气体及其压力被适当调节。

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