Sample Preparation
A wide selection of sample preparation equipment is available for both biological and materials sample preparation in our purpose fitted laboratories. Training on appropriate sample preparation techniques will be provided as required. An advanced induction is required to access specialised chemical and physical containment level 2 (PC2) laboratories and additional personal protective equipment may be required.
Electron microscopy biological sample preparation
Sample preparation equipment available at CMCA@Physics for both room temperature and cryo electron microscopy sample processing is listed below.
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PELCO biowave microwave processor
Microwave preparation of biological samples for light and electron microscopy is available using a new (2022) Pelco Biowave Pro+ with EM accessories, including vacuum, stirring and temperature control capabilities. Results in accelerated and in many cases, enhanced, sample preparation.
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Vibratome 3000
Deluxe EM vibratome tissue sectioning system with temperature control and various stage assemblies. For 10s-of-microns scale sectioning of fresh, fixed, or agarose embedded materials. Sectioned materials can be directly imaged with optical microscopy, further prepared for SEM imaging, or embedded in resin and sectioned at micron or nanometre thickness.
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Critical point dryer
Used to fully dry biological / organic / polymer / soft samples, typically for scanning electron microscopy (SEM) imaging. Uses carbon dioxide and has a wide range of specimen baskets.
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Microtomes
A Leica EM UC6 ultramicrotome, Reichert ultramicrotome, and a Sorval microtome are available for cutting sections for light microscopy (500 nm - 5 um) and transmission electron microscopy (TEM; 50 nm - 200 nm). The UC6 microtome also has an FC6 cryo-microtome attachment.
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Vacuum oven
A dedicated vacuum oven is available, which aids resin infiltration and curing under vacuum. Can be used at room temperature and as a curing oven and can provide an O-free environment for curing methacrylate resins.
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Leica EMPact II High Pressure Freezer
The Leica EMPact II High Pressure Freezer produces optimal cryopreservation of samples, preserving ultrastructure without chemical distortion, or ice crystal formation & damage.
Samples must be small (< 400 um) and can subsequently be imaged directly using cryoSEM, freeze dried for room temperature SEM, or freeze-substituted for room temperature TEM.
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Leica Freeze Substitution Unit
The Leica Freeze Substitution system allows for frozen samples to be bought to room temperature, before being resin embedded for room temperature TEM imaging.
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Emitech Freeze DrierThe Emitech turbo pumped freeze-drying system allows for frozen samples to be dried at low temperature under vacuum (ice is sublimated). Samples are bought to room temperature, before being imaged using room temperature TEM or mounted and coated for room temperature SEM.
As it is a turbo-pumped system it is only suitable for high quality drying of very small (micro-litre) samples, it is NOT suitable for freeze drying general bulk samples. -
CryoSEM Preparation System
The Leica EM ACE600 system with VCT500 shuttle attachment facilitates the transfer of cryo-prepared samples into the cryoSEM. The unit can be used to freeze fracture, sublimate, and coat samples (metal and/or carbon) prior to cryoSEM imaging and/or element analysis.
Using the shuttle the workflow can extend from either the VCM or the FC7 cryo-microtome, into the ACE600, with final vacuum transfer to the cryoSEM.
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CryoMicrotome
A dedicated Leica EM UC7/FC7 cryo-microtome with VCT500 shuttle attachment is available for cryo-microtomy purposes (cryo-sections, cryo-planing, Tokyashu technique) and direct transfer of samples to the ACE600 CryoSEM preparation system. The UC6 microtome also has an FC6 cryo-microtome attachment.
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Leica GP2 plunge freezer
A leica GP2 plunge freezing system is available for the cryo-preparation of samples for cryoSEM and cryoTEM. This system is designed to rapidly cryo-preserve the sample by plunge freezing into liquid ethane, with minimal ice crystal formation & damage to structure. CryoTEM grids can be blotted, and procedures can be automatically saved and recalled. Small cryoSEM samples mounted on pins can also be plunge frozen using the GP2.
Electron Microscopy material sample preparation
Instruments for the preparation of materials are located at Crawley Campus.
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Polishing equipment
Buehler Handimet two-roll grinder for manual grinding applications. Self-contained four stage grinding stations with controlled water flow.
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HHV Auto-306 Carbon Coater
Used for applying a conductive carbon coating to the sample surface.
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Leica EM ACE600 Metal Coater
Utilized for coating samples with platinum or gold to enhance conductivity.
Data analysis
As modern research tools increasingly acquire large amounts of multi-dimensional data, having a data analysis plan is more important than ever.
We can assist you with the development of a data management plan and provide advice in relation to the analysis and visualisation of your data.
Research data management plan
UWA has developed a Data Management Plan for data in digital format. It includes a checklist for researchers covering issues in relation to data ownership, collection, organisation, storage, backup, retention, disposal and access. For further information see the Research Data Management Toolkit and note therein that:
Recommended Storage and Transfer options
UWA Institutional Research Data Store (IRDS)
A centralised, secure and UWA-supported data storage; enables ongoing access at no cost to UWA researchers; supported by a dedicated high speed fibre optic connection that ensures reliable high-performance bandwidth; includes backup and recovery capability. Sign on using UWA Pheme credentials.
CMCA instrument data share
This is a network drive mounted on a number of instrument PCs and facility workstations.
You can transfer your data to this share and then use a CMCA workstation to transfer the data to your own USB storage device. This share is to be used for transfer purposes only. It is not a storage solution.
Data analysis and visualisation
Local Workstation Computing
Instrument specific reconstruction, analysis and visualisation software are typically available on both the instrument PC and one or more local workstations within the facility. Numerous proprietary and free software tools are available for processing, analysing and visualising your data.
High Performance Computing (HPC)
Various high performance computing options are available for projects generating large amounts of complex data, specifically for volume and electron microscopy workflows.