公开(公告)号：US20090072192A1

公开(公告)日：2009-03-19

申请号：US12229683

申请日：2008-08-26

Applicant: Sudipta Seal ,  Debasis Bera ,  Suresh C. Kuiry ,  Meyya Meyyappan ,  Matthew Luke McCutchen

Inventor： Sudipta Seal ,  Debasis Bera ,  Suresh C. Kuiry ,  Meyya Meyyappan ,  Matthew Luke McCutchen

IPC: C09K3/00

CPC classification number: B82Y40/00 ,  B82Y30/00 ,  C01B32/16 ,  C01B2202/02 ,  C01B2202/06 ,  C01B2202/36 ,  Y10S977/846

Abstract: A novel method for simultaneously forming and filling and decorating carbon nanotubes with palladium nanoparticles is disclosed. Synthesis involves preparing a palladium chloride (PdCl2) solution in a container, having two graphite electrodes, then immersing the graphite electrode assembly, into the PdCl2 solution; connecting the graphite electrodes to a direct current power supply; bringing the electrodes into contact with each other to strike an arc; separating the electrodes to sustain the arc inside the solution; putting the container with electrode assembly in a water-cooled bath; and collecting Pd-nanoparticles encapsulated in carbon nanotubes and carbon nanotubes decorated with Pd-nanoparticles. The temperature at the site of the arc-discharge is greater than 3000° C. At these temperatures, the palladium is ionized into nanoparticles and the graphite electrodes generate layers of graphene (carbon), which roll away from the anode and encapsulate or entrap the Pd-nanoparticles. The unique nanotube structures have significant commercial potential as gas sensors or as a means for hydrogen storage.

Abstract translation: 公开了一种用钯纳米颗粒同时形成和填充和装饰碳纳米管的新方法。 合成包括在容器中制备氯化钯（PdCl 2）溶液，其具有两个石墨电极，然后将石墨电极组件浸入PdCl 2溶液中; 将石墨电极连接到直流电源; 使电极彼此接触以产生电弧; 分离电极以维持溶液内的电弧; 将容器与电极组件放在水冷浴中; 并收集封装在碳纳米管中的Pd-纳米颗粒和用Pd-纳米颗粒装饰的碳纳米管。 电弧放电现场的温度大于3000℃。在这些温度下，钯离子化成纳米颗粒，石墨电极产生石墨烯层（碳），其从阳极卷起并封闭或截留 钯纳米粒子。 独特的纳米管结构作为气体传感器或作为氢存储的手段具有显着的商业潜力。

公开(公告)号：US07426848B1

公开(公告)日：2008-09-23

申请号：US11203576

申请日：2005-08-05

Applicant: Jing Li ,  Meyya Meyyappan

Inventor： Jing Li ,  Meyya Meyyappan

IPC: G01N7/00

CPC classification number: G01N27/70

Abstract: A method and system for estimating one, two or more unknown components in a gas. A first array of spaced apart carbon nanotubes (“CNTs”) is connected to a variable pulse voltage source at a first end of at least one of the CNTs. A second end of the at least one CNT is provided with a relatively sharp tip and is located at a distance within a selected range of a constant voltage plate. A sequence of voltage pulses {V(tn)}n at times t=tn (n=1, . . . , N1; N1≧3) is applied to the at least one CNT, and a pulse discharge breakdown threshold voltage is estimated for one or more gas components, from an analysis of a curve I(tn) for current or a curve e(tn) for electric charge transported from the at least one CNT to the constant voltage plate. Each estimated pulse discharge breakdown threshold voltage is compared with known threshold voltages for candidate gas components to estimate whether at least one candidate gas component is present in the gas. The procedure can be repeated at higher pulse voltages to estimate a pulse discharge breakdown threshold voltage for a second component present in the gas.

Abstract translation: 一种用于估计气体中的一种，两种或更多种未知组分的方法和系统。 间隔开的碳纳米管（“CNT”）的第一阵列在至少一个CNT的第一端连接到可变脉冲电压源。 至少一个CNT的第二端设置有相对尖锐的尖端并且位于恒压板的选定范围内的距离处。 在时刻t = t n n（n = 1，...，N 1; ...）时的电压脉冲序列V V（t N n N n） N 1> = 3）被施加到至少一个CNT，并且对于一个或多个气体成分估计脉冲放电击穿阈值电压，从对曲线I（t）的分析可以得到 电流或从至少一个CNT传输到恒电压板的电荷的曲线e（t n n n），将每个估计的脉冲放电击穿阈值电压与候选气体成分的已知阈值电压进行比较， 估计气体中是否存在至少一种候选气体成分，该过程可以在更高的脉冲电压下重复以估计存在于气体中的第二成分的脉冲放电击穿阈值电压。

公开(公告)号：US07276266B1

公开(公告)日：2007-10-02

申请号：US10320698

申请日：2002-12-13

Applicant: Bishun N. Khare ,  Meyya Meyyappan

Inventor： Bishun N. Khare ,  Meyya Meyyappan

IPC: H05H1/24

CPC classification number: H05H3/02 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/174 ,  C01B2202/02 ,  Y10S427/102

Abstract: Method and system for functionalizing a collection of carbon nanotubes (CNTs). A selected precursor gas (e.g., H2 or F2 or CnHm) is irradiated to provide a cold plasma of selected target particles, such as atomic H or F, in a first chamber. The target particles are directed toward an array of CNTs located in a second chamber while suppressing transport of ultraviolet radiation to the second chamber. A CNT array is functionalized with the target particles, at or below room temperature, to a point of saturation, in an exposure time interval no longer than about 30 sec.

Abstract translation: 用于功能化碳纳米管（CNT）集合的方法和系统。 照射选择的前体气体（例如H 2 N 2或F 2 H或C n H H H），以提供 所选择的目标颗粒的冷等离子体，例如原子H或F，在第一室中。 目标颗粒指向位于第二室中的CNT阵列，同时抑制紫外线辐射传送到第二室。 在不超过约30秒的曝光时间间隔内，CNT阵列在目标颗粒处于或低于室温下功能化到饱和点。

公开(公告)号：US07217650B1

公开(公告)日：2007-05-15

申请号：US10816576

申请日：2004-03-24

Applicant: Hou Tee Ng ,  Jun Li ,  Meyya Meyyappan

Inventor： Hou Tee Ng ,  Jun Li ,  Meyya Meyyappan

IPC: H01L21/4763

CPC classification number: H01L21/76885 ,  H01L23/53276 ,  H01L2221/1094 ,  H01L2924/0002 ,  Y10S977/842 ,  Y10S977/843 ,  H01L2924/00

Abstract: A method for fabricating an electrical interconnect between two or more electrical components. A conductive layer is provided on a substarte and a thin, patterned catalyst array is deposited on an exposed surface of the conductive layer. A gas or vapor of a metallic precursor of a metal nanowire (MeNW) is provided around the catalyst array, and MeNWs grow between the conductive layer and the catalyst array. The catalyst array and a portion of each of the MeNWs are removed to provide exposed ends of the MeNWs.

Abstract translation: 一种用于在两个或多个电气部件之间制造电互连的方法。 导电层设置在基体上，薄的图案化催化剂阵列沉积在导电层的暴露表面上。 在催化剂阵列周围提供金属纳米线（MeNW）的金属前体的气体或蒸汽，并且MeNWs在导电层和催化剂阵列之间生长。 除去催化剂阵列和每个MeNW的一部分以提供MeNW的暴露端。