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    GloQube® Plus Glow Discharge System for TEM Grids and surface modification

    The GloQube® Plus is a cost-effective, compact and easy to use glow discharge system, designed to fulfil the needs of laboratories with TEM.
    The primary application of the GloQube® Plus is to modify the surface of TEM grids in a way that it meets requirements for successful imaging of a variety of macromolecules. Integrated into one system, the two chambers enable the user
    maximum flexibility to choose which sample preparation technique they want to use: glow discharge in-air or in-chemical vapour, without downtime for cleaning or the risk of contamination and loss of samples.
    The in-chemical vapour glow discharge doesn’t just help with retaining molecules on the TEM grids, but it also allows the user to control the orientation and conformation. With automatic vapour control, the system ensures accurate concentrations of chemical vapour in the plasma, producing reliable and reproducible results.
    Two chambers designed into one easy to use package provides a smaller footprint for the workflow space and no cross-contamination between the chambers.


    • Short in-air cycle time
    • Second chamber for separating in-air and in-vapour processes
    • No cross-contamination between chambers due to post-process flush cycle
    • Automatic vapour delivery ensures reliable and reproducible results
    • Purge cycles reduce water vapour and oxygen concentrations, ensuring excellent yield of specifically orientated macromolecules
    • Adjustable slow vent time to minimise sample disturbance
    • Optional fast vent for rapid process times
    • Safe handling of reagent
    • Three level adjustable height sample stage ensures repeatable results

    Recommended applications: 

    • Hydrophilisation and cleaning of TEM grids carbon support films* for better sample spreading
    • Improved adhesion and orientation of proteins, nucleic acids and antibodies
    • TEM grid preparation for nanoparticle studies
    * Typically: Formvar®, Lacey Carbon, Holey Carbon, Continuous Carbon, Quantifoil®

    Key features

    • Automatic control of vapour and air introduction
    • Flush and purge cycles of vapour chamber and gas line
    • Two chambers for separate in-air and in-vapour processes without contamination* * Only one chamber can be used at a time
    • Fully automatic
    • Loaded with typical standard recipes
    • Password protected user profiles and programmable user recipes
    • Negative and positive discharge modes
    • Single door for easy sample loading
    • Adjustable three height sample stage
    • Intuitive touch screen control
    • Safe vapour delivery using septum-sealed vials
    • Automatic valving between chambers to prevent cross-contamination
    • Fast and/or soft venting options
    • Extended warranty option

    Click to download the product brochure

    • Product Description
    • Images
    • Ordering information
    • Additional Information
    • Downloads & Specifications
    The GloQube® Plus is a cost-effective, compact and easy to use glow discharge system, designed to fulfil the needs of laboratories with TEM.
     Surface state     Charge       Atmosphere     Typical applications    
     Hydrophilic  Negative  Air  Hydrophilisation and cleaning of carbon coated TEM grids
     Hydrophilic  Positive  Air*  Nucleic acid adhesion to carbon films
     Hydrophobic**  Positive  Alkylamine  Controlled orientation and improved adhesion of negatively charged proteins, antibodies   and nucleic acids
     Hydrophobic**  Negative  Methanol
     Controlled orientation and improved adhesion of positively charged protein molecules   (e.g. ferritin, cytochrome c)


    * Air followed by post-treatment with magnesium acetate by the user.
    ** Hydrophobic, as noted above, may represent a less hydrophilic sample of less than 90 degrees contact angle.

    Twin chambers prevent cross contamination

    The GloQube® Plus uses a single door with two independent vacuum chambers and adjustable sample stages. The in-air chamber is for simple glow discharge hydrophilic applications, while the in-vapour chamber is designed for hydrophobic (negative or positive) conversions, typically using reagents such as methanol and amylamine. By utilising purge and flush cycles, we ensure contamination from the vapour chamber* does not affect the in-air chamber.
    * For health and safety reasons when using the in-vapour chamber with chemicals the pump exhaust must be vented to a suitable external extraction system

    Automatic Valve

    The automatic valve system allows greater control over the introduction of chemical vapour into the chamber. This results in reproducibility and repeatability of processing. The self-contained nature of the septum-sealed
    chemical vials and the delivery system ensures minimal user contact and a high level of operator safety.**
    ** Chemical preparation and disposal should be carried out in a suitable fume hood.

    Easy sample loading

    Each of the twin chambers can accommodate two 25 x 75 mm glass
    microscope slides or TEM grid holders.  Loading could not be easier using a drawer-style chamber door and specimen stages. The stages are height adjustable and fitted with removable glass slide holders. The door and stages can be completely removed for convenience and to allow easy access for chamber cleaning.

    Process control

    The GloQube® Plus is an automated system, which has a recipe driven process control user interface for ease of use. Filtered inlets ensure that delicate samples, such as carbon coated TEM grids, are not contaminated with particles or dust. The GloQube® Plus requires a single vacuum pump working in the 0.1 to 1 mbar range and has a typical pump downtime to operational vacuum of 60 seconds and a total cycle time in-air of usually less than two minutes*.  A 750 mm flexible stainless vacuum hose is supplied with the GloQube® Plus.
    * Using a 30 second glow discharge process

    This product is for Research Use Only. 

    No. GloQubePLUS
    GloQube Plus

    Vacuum pumping

    13034 5 m3/hr Pfeiffer DUO 6 two-stage rotary vacuum pump with O7803 oil mist filter

    O7803 Oil mist filter (spare)

    Options, accessories and spares

    028273.  Grid Holder 36

    25195. Microscope slide tray

    25266. Glass vial (packet of 10)

    25267. Glass vial caps (packet of three)

    25345. Needle

    24755. Door seal



    28673 –  VIAL SEALING WASHER, Ø22.5mm O/D x Ø10mm I/D x 1mm THICK, VITON



    Power and processes:

     Plasma current  1-50 mA
     HV power supply  30 W
     Maximum voltage  800 V
     Electrode polarity – clean chamber  DC glow positive DC glow negative
     Electrode polarity – vapour  chamber  DC glow positive DC glow negative
     Sample stage  125 x 100 mm (4.9” x 3.94”) for two 25 x 75 mm (1” x 3”) slides and a 36 place grid holder
     Sample stage operational heights  Adjustable 12.5 mm (0.5”), 22.5 mm (0.9”) or 35 mm (1.38”)
     Pump hold time  0-72 hours
     Process time  1-900 seconds


     Chamber vent inlets  Filtered air inlets with fast or slow vent options to minimise sample disturbance
     On-board reagent storage
     Reagents are contained in sealed glass vials to minimise exposure to hazards
     High voltage safety interlocks  Hardware safety interlocked and software for process control


     Vacuum control  Integrated pirani gauge
     Working vacuum range  0.1 to 1 mbar
     Pump minimum requirements  5 m3/hr inlet flange; KF 16
     Pumping time  Typical pump down time to an operational vacuum of 0.1 mbar in less than 60 seconds
     Vacuum isolation  Isolation valves to switch vacuum and prevent process chamber cross-contamination

    User interface

    • Capacitive touch screen has improved sensitivity for ease of use
    • User interface software has been completely revised, using a modern smartphone-style interface
    • Comprehensive context-sensitive help screen
    • USB interface allows easy software updates and backing up/copying of recipe files to USB stick
    • Process log files can be exported via USB port in .csv format for analysis in Excel or similar. Log files include date, time and process parameters.
    • 16GB of flash memory can store more than 1000 recipes
    • Dual-core ARM processor for a fast, responsive display

    Dimensions and communications

    Note: the pump data is for the Pfeiffer DUO 6

    Instrument size/weight
     366 mm W x 364 mm D x 336 mm D   19.4 kg
     Pump weight  391 mm W x 127 mm D x 177 mm H16 kg
     Footprint with pump  366 mm W x 600 mm D x 336 mm H
     Power requirements  120 V 60 Hz, 15 A or 230 V 50 Hz, 10 A
     Instrument power rating  100-240 V AC 60/50 Hz 700 VA including pump, IEC inlet
     Pump power rating  115/230 V 60/50 Hz 450 W
     Communication port
     USB Port



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