EMS GRIDS & TEM SUPPORT FILMS CATALOG EDITION V TEM SUPPORT FILMS


Graphene Oxide Support Films for TEM Graphene Oxide Membranes


A Scalable and Efficient Application of 2D Materials Since the first report on producing the two-dimensional (2D) material


graphene in 2004, there has been considerable time and money invested into developing new graphene-based technologies. These aim to exploit the remarkable


zzzGraphene Oxide TEM Support Films


Schematic depiction of image b (below) in 3D. Adapted from Bosch-Navarro.


properties of graphene including its strength and electrical- and thermal- conductivity. At a basic level, transmission electron microscopy (TEM) image contrast is caused by the scattering of electrons and is dependent on the thickness and composition of the sample material. The ultimate thinness of graphene, combined with the low atomic number of carbon, provides the ideal blueprint for a low-contrast TEM support. Producing graphene and transferring onto a TEM support grid is difficult to carry out at large scale and high yield. A simpler, cheaper, and higher yield production method uses graphene oxide, a 2D material similar to graphene. Graphite is reduced using a strong oxidising agent, and the oxygen functionalities introduced render it hydrophilic, allowing it to be easily dispersed in water, as well as other organic solvents. Controlled sonication of the water- dispersed material allows finely-tuned exfoliation of the graphene oxide, which in turn allows samples, including TEM supports, to be coated in single or few-layer graphene oxide. These flakes possess the low contrast benefits of graphene, which, combined with the efficient production of graphene oxide, make it ideal as a cheap, high-yield TEM support.


Graphene Oxide (GO) support film is a super thin (<1nm), naturally hydrophilic layer placed over the Holey, Lacey or Quantifoil support film on copper or gold grids. Pre-treatment of GO Support Films is unnecessary - by default, the hydrophilic surface spreads particles evenly across the grid. A hydrophobic surface can be achieved by heating in the air. Note: plasma cleaning or glow discharge will damage the support film.


Features


z Works well with Holey Carbon, Lacey Carbon and Quantifoil grid types, effectively spanning the gaps


z Less expensive to produce due to complexity of graphene manufacturing z Better background contrast than graphene, results in higher resolution z Nearly transparent in electron beam z Barely visible under optical microscopes z Regular batch checking ensures correct coverage of monolayers


Ordering Information zzzGraphene Oxide on Holey Carbon Copper Mesh Grids


Cat. No.


GOHC300Cu10 GOHC300Cu25 GOHC300Cu50


Film


GO on Holey Carbon GO on Holey Carbon GO on Holey Carbon


Film


Grid Cu Cu Cu


GOLC300Cu10 GOLC300Cu25 GOLC300Cu50 GOLC300Cu100


GO on Lacey Carbon GO on Lacey Carbon GO on Lacey Carbon GO on Lacey Carbon


zzzGraphene Oxide on Quantifoil Grids


Copper and Gold versions available Cat. No.


Film


GOQ200R24Cu10 GOQ200R24Cu25 GOQ200R24Cu50 GOQ300R22Cu10 GOQ300R22Cu25 GOQ300R24Cu10 GOQ300R24Cu25 GOQ300R24Cu50


GO on Quantifoils R2/4 GO on Quantifoils R2/4 GO on Quantifoils R2/4 GO on Quantifoils R2/2 GO on Quantifoils R2/2 GO on Quantifoils R2/4 GO on Quantifoils R2/4 GO on Quantifoils R2/4


a) A high-resolution TEM image showing gold nanopar- ticles dispersed across modified graphene-oxide. b) Magnified image of red-box area in image a, showing single gold-nanoparticles with atomic resolution.


58


GOQ400R1213Au10 GO on Quantifoils R1.2/1.3 GOQ400R1213Au25 GO on Quantifoils R1.2/1.3 GOQ400R1213Au50 GO on Quantifoils R1.2/1.3 GOQ400R1213Cu10 GO on Quantifoils R1.2/1.3 GOQ400R1213Cu25 GO on Quantifoils R1.2/1.3 GOQ400R1213Cu50 GO on Quantifoils R1.2/1.3 GOQ400R1213Cu100 GO on Quantifoils R1.2/1.3


Grid Cu Cu Cu Cu Cu Cu Cu Cu Au Au Au Cu Cu Cu Cu


Mesh 200 200 200 300 300 300 300 300 400 400 400 400 400 400 400


Qty


10/pk 25/pk 50/pk 10/pk 25/pk 10/pk 25/pk 50/pk 10/pk 25/pk 50/pk 10/pk 25/pk 50/pk


100/pk


Grid Cu Cu Cu Cu


Mesh 300 300 300


zzzGraphene Oxide on Lacey Carbon Copper Mesh Grids Cat. No.


Mesh 300 300 300 300


Qty


10/pk 25/pk 50/pk


Qty


10/pk 25/pk 50/pk


100/pk


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