نتایج جستجو برای: nanoporous

تعداد نتایج: 4915  

Journal: :Biomedical microdevices 2009
Jeong-Mi Moon Demir Akin Yi Xuan Peide D Ye Peixuan Guo Rashid Bashir

Bacteriophage phi29 virus nanoparticles and its associated DNA packaging nanomotor can provide for novel possibilities towards the development of hybrid bio-nano structures. Towards the goal of interfacing the phi29 viruses and nanomotors with artificial micro and nanostructures, we fabricated nanoporous Anodic Aluminum Oxide (AAO) membranes with pore size of 70 nm and shrunk the pores to sub 4...

Journal: :Advanced Materials Interfaces 2023

Nanoporous Gold Films In article number 2300212, Suck Won Hong, Dongyun Lee, and colleagues report a simple process for manufacturing hierarchically-wrinkled nanoporous gold films with reconfigurable architecture in the microstructured array use surface-enhanced Raman scattering (SERS) substrates. The SERS-active substrates multilayered overlapping features of numerous nanoscale cracks microsca...

A. Badiei F. Aleali Gh. Mohammadi Ziarani, N. Lashgari

Knoevenagel condensation between barbituric acid and aldehyde was investigated in the presence of sulfonic acid functionalized nanoporous silica (SBA-Pr-SO3H) and resulted in the formation of arylidene and bis-arylidene barbiturates. Excellent yields and short reaction times are related to the high efficiency of SBA-Pr-SO3H that the reactions take place easily in its nano-pores. SBA-Pr-SO3H as ...

2006
Nanoporous Gold Andrea M. Hodge Joel R. Hayes Jose A. Caro Juergen Biener Alex V. Hamza

Metallic foams with pore sizes from 250 lm to 2 mm have been a subject of research for over two decades due to their high surface area, which allows for a variety of applications, such as thermal and sound insulation. Recently, processing of metallic foams at the nanoscale (pores sizes less than 100 nm) has opened the door to new and interesting applications, such as sensors and actuators. In g...

Journal: :Nanoscale 2016
H-J Qiu L Y Chen Y Ito J L Kang X W Guo P Liu H Kashani A Hirata T Fujita M W Chen

Graphene with a large specific surface area and high conductivity has a large specific capacitance. However, its volumetric capacitance is usually very low because the restacking of 2D graphene sheets leads to the loss of the large ion-accessible surface area. Here we report squeezable bicontinuous nanoporous nitrogen-doped graphene, which is extremely flexible and can tolerate large volume con...

Journal: :Nanotechnology 2010
Mazhar E Nasir Duncan W E Allsopp Christopher R Bowen Graham Hubbard Keith P Parsons

This paper describes the formation of mono-domain highly ordered nanoporous alumina on the scale of a 2 inch diameter silicon wafer by anodization of aluminium evaporated on a patterned SiO(2) mask on a silicon substrate. The position of the ordered pores correlates with holes in the SiO(2) mask, which guide the electric field during anodization and initiates pore nucleation. The technique is s...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2005
Dhaval A Doshi Andrew M Dattelbaum Erik B Watkins C Jeffrey Brinker Basil I Swanson Andrew P Shreve Atul N Parikh Jaroslaw Majewski

Single bilayer membranes of 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) were formed on ordered nanocomposite and nanoporous silica thin films by fusion of small unilamellar vesicles. The structure of these membranes was investigated using neutron reflectivity. The underlying thin films were formed by evaporation induced self-assembly to obtain periodic arrangements of silica and sur...

Journal: :Chemphyschem : a European journal of chemical physics and physical chemistry 2012
Dirk Mehlhorn Rustem Valiullin Jörg Kärger Kanghee Cho Ryong Ryoo

Specially synthesized extra-large crystallites of zeolite LTA with intentionally added mesoporosity are used for an in-depth study of guest diffusion in hierarchical nanoporous materials by the pulsed field gradient NMR technique. Using propane as a guest molecule, intracrystalline mass transfer is demonstrated to be adequately described by a single effective diffusivity resulting from the weig...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2007
Segyeong Joo Sejin Park Taek Dong Chung Hee Chan Kim

In this paper, we describe an amperometric-type enzymeless glucose sensing system based on a nanoporous platinum (Pt) electrode embedded in a microfluidic chip. This microchip system is comprised of a microfluidic transport channel network and a miniaturized electrochemical cell for nonenzymatic glucose sensing. Sample and buffer solutions were transferred to the cell by programmed electroosmot...

2009
Erkin Seker Michael L. Reed Matthew R. Begley

Nanoporous gold (np-Au) has intriguing material properties that offer potential benefits for many applications due to its high specific surface area, well-characterized thiol-gold surface chemistry, high electrical conductivity, and reduced stiffness. The research on np-Au has taken place on various fronts, including advanced microfabrication and characterization techniques to probe unusual nan...

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