Preparing ripening-suppressed metallic nanoparticles using a laser-irradiated carbon nanotube sacrificial layer

2020 ◽  
Vol 506 ◽  
pp. 144705 ◽  
Author(s):  
Lei Wang ◽  
Xiannian Chi ◽  
Xia Wang ◽  
Qian Liu ◽  
Lianfeng Sun
Keyword(s):  
Carbon Nanotube ◽  
Metallic Nanoparticles ◽  
Sacrificial Layer

A CMOS Compatible Carbon Nanotube Growth Approach

2011 ◽  
Vol 1284 ◽  
Author(s):  
Daire Cott ◽  
Masahito Sugiura ◽  
Nicolo Chiodarelli ◽  
Kai Arstila ◽  
Philipe M. Vereecken ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Metallic Nanoparticles ◽  
Elevated Temperatures ◽  
Microwave Plasma ◽  
High Density ◽  
Growth Environment ◽  
Future Technology ◽  
Cmos Compatible ◽  
Technology Nodes

ABSTRACTIn future technology nodes, 22nm and below, carbon nanotubes (CNTs) may provide a viable alternative to Cu as an interconnect material. CNTs exhibit a current carrying capacity (up to 109 A/cm2), whilst also providing a significantly higher thermal conductivity (SWCNT ~ 5000 WmK) over Copper (106 A/cm2 and ~400WmK). However, exploiting such properties of CNTs in small vias is a challenging endeavor. In reality, to outperform Cu in terms of a reduction in via resistance alone, densities in the order of 1013 CNTs/cm2 are required. At present, conventional thermal CVD of carbon nanotubes is carried out at temperatures far in excess of CMOS temperature limits (400 C). Furthermore, high density CNT bundles are most commonly grown on insulating supports such as Al2O3 and SiO2 as they can effectively stabilize metallic nanoparticles at elevated temperatures but this limits their application in electronic devices. To circumvent these obstacles we employ a remote microwave plasma to grow high density CNTs at a temperature of 400 C on conductive underlayers such as TiN. We identify some critical factors important for high-quality CNTs at low temperatures such as control over the catalyst to underlayer interaction and plasma growth environment while presenting a fully CMOS compatible carbon nanotube synthesis approach

Highly sensitive and selective carbon nanotube-based gas sensor arrays functionalized with different metallic nanoparticles

2015 ◽  
Vol 220 ◽  
pp. 1288-1296 ◽  
Author(s):  
Ahmed Abdelhalim ◽  
Maximilian Winkler ◽  
Florin Loghin ◽  
Christopher Zeiser ◽  
Paolo Lugli ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Gas Sensor ◽  
Metallic Nanoparticles ◽  
Sensor Arrays ◽  
Highly Sensitive ◽  
Gas Sensor Arrays

scholarly journals Fuel Cell Electrodes Based on Carbon Nanotube/Metallic Nanoparticles Hybrids Formed on Porous Stainless Steel Pellets

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
S. M. Khantimerov ◽  
E. F. Kukovitsky ◽  
N. A. Sainov ◽  
N. M. Suleimanov
Keyword(s):  
Carbon Nanotubes ◽  
Stainless Steel ◽  
Carbon Nanotube ◽  
Fuel Cell ◽  
Metallic Nanoparticles ◽  
Colloidal Solution ◽  
Fuel Cell Electrodes ◽  
Metallic Particles ◽  
Porous Stainless Steel ◽  
Nickel Acetate Tetrahydrate

The preparation of carbon nanotube/metallic particle hybrids using pressed porous stainless steel pellets as a substrate is described. The catalytic growth of carbon nanotubes was carried out by CVD on a nickel catalyst obtained by impregnation of pellets with a highly dispersive colloidal solution of nickel acetate tetrahydrate in ethanol. Granular polyethylene was used as the carbon source. Metallic particles were deposited by thermal evaporation of Pt and Ag using pellets with grown carbon nanotubes as a base. The use of such composites as fuel cell electrodes is discussed.

scholarly journals Ostwald Ripening of Platinum Nanoparticles Confined in a Carbon Nanotube/Silica-Templated Cylindrical Space

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Cintia Mateo-Mateo ◽  
Carmen Vázquez-Vázquez ◽  
Moisés Pérez-Lorenzo ◽  
Verónica Salgueiriño ◽  
Miguel A. Correa-Duarte
Keyword(s):  
Carbon Nanotube ◽  
Platinum Nanoparticles ◽  
Metallic Nanoparticles ◽  
Ostwald Ripening ◽  
Size Distributions ◽  
Confined Space ◽  
Sintering Process ◽  
Particle Size Distributions ◽  
Final Particle ◽  
Ostwald Ripening Mechanism

Sintering of nanoparticles mediated by an Ostwald ripening mechanism is generally assessed examining the final particle size distributions. Based on this methodology, a general approach for depositing platinum nanoparticles onto carbon nanotubes in solution has been employed in order to evaluate the sintering process of these metallic nanoparticles at increasing temperatures in a carbon nanotube/silica-templated confined space.

Investigation of Electrical Conductivity of Polyacrylonitrile (PAN) Nanofibers/Nano Particul (Ag,Cu, CNT and GNR)

2017 ◽  
Vol 16 ◽  
pp. 20-25 ◽  
Author(s):  
Gürol Önal ◽  
Mehmet Okan Erdal ◽  
Kevser Dincer
Keyword(s):  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Metallic Nanoparticles ◽  
Room Temperature ◽  
Graphene Nanoribbon ◽  
Copper Electrode ◽  
Fiber Layer ◽  
Multiwalled Carbon ◽  
Vacuum Oven ◽  
Spinning Process

In this study 1% Ag (silver), Cu (copper), CNT (carbon nanotube) and graphene nanoribbon (GNR) nanoparticle reinforced PAN fibers were prepared and the effects of nanoparticle reinforcements upon electrical conductivity were investigated. In experimental study, graphene nanoribbon powders were produced from multiwalled carbon nanotube (MWCNT) through using the chemical approach of Hummers method. Fiber layer was dissolved at room temperature in magnetic mixer with Polyacrylonitrile (PAN) and Dimethil Formamide (DMF) which was at the rate of 10 % by mass. Thus, a viscou gel solution was obtained then nanoparticles were added to the PAN/DMF solution and the solution was vigorously stirred for one hour at room temperature. After stirring that solution was continued for 15 m in ultrasonic bath. The polymeric solution was first transferred to a 5 mL syringe, which was connected to a capillary needle with an inside diameter of 0,8 mm. A copper electrode was attached to the needle, a DC power supply produces 25 kV against a grounded collector screen distant 15cm. With the syringe pump set at 2 mL/h, the electric force overcomes the surface tension of the solution at the capillary tip, and a jet emerges. Produced fibers were collected on the rotary collector which spins at 250 rpm. Nanofiber was dried at 60 °C for 12 h in vacuum oven. Eventually, nanofiber of polyacrylonitrile (PAN) reinforced by metallic nanoparticles and graphene nanoribbon (GNR) were prepared by electro spinning process. Electrical conductivity of the obtained nanofiber were studied by measuring the electrical resistance thanks to home-made plate electrodes.

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