Dpn Ink Categories

10 Questions

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Dpn Ink Categories

What are the characteristics of DPN deposition materials?


Questions and Answers
  • 1. 
    All of the following are molecular inks except...
    • A. 

      Alkanethiols

    • B. 

      Silanes

    • C. 

      High molecular weight polymers

    • D. 

      Protein carrier solution

    • E. 

      All of the above are molecular inks

  • 2. 
    What is NOT true about liquid inks?
    • A. 

      Best for sub-micron features

    • B. 

      Water meniscus mediated deposition

    • C. 

      Can only write to gold

    • D. 

      Limited to alkanethiols

    • E. 

      All of the above are not true

  • 3. 
    What is NOT true about molecular inks?
    • A. 

      Best for sub-micron features

    • B. 

      Water meniscus mediated deposition

    • C. 

      Can write to multiple different surfaces

    • D. 

      Limited to alkanethiols

    • E. 

      None of the above

  • 4. 
    A customer wants to create 100 nm features.  What is the most important thing to consider when recommending a solution?
    • A. 

      Chemistry background of the researcher

    • B. 

      Skill of the graduate student or postdoc

    • C. 

      The substrate needed by the customer

    • D. 

      Ability to apply a molecular ink

    • E. 

      Tip array geometry

  • 5. 
    Polymer inks have their own category because...
    • A. 

      They are a very large category

    • B. 

      They can act like either molecular or liquid inks

    • C. 

      These are most useful to bioengineers

    • D. 

      They are difficult to categorize

    • E. 

      All of the above

  • 6. 
    The minimum feature sizes of low molecular weight polymer inks, like 500 D PEG-DMA, are controlled by...
    • A. 

      Water meniscus size

    • B. 

      Tip-surface dwell time

    • C. 

      Deposition temperature and humidity

    • D. 

      Tip sharpness

    • E. 

      All of the above

  • 7. 
    This image dipicts some of the advantages and limitations of a liquid ink.  What is NOT one of them?   
    • A. 

      Multiplexed depositions are possible

    • B. 

      Difficult to reach feature resolutions smaller than 1 micron.

    • C. 

      Can only write orthogonal dots and lines (i.e. no circles)

    • D. 

      Can rapidly prototype patterns with subcellular feature resolution

    • E. 

      All of the above are true

  • 8. 
    This image shows the use of a molecular ink.  Which of the following is NOT true about molecular inks. 
    • A. 

      Sub-micron feature resolution

    • B. 

      Molecular inks can be used for top-down or bottom-up lithography.

    • C. 

      Can rapidly prototype patterns with sub-micron feature resolution

    • D. 

      Multiplexed depositions are possible

    • E. 

      All are true

  • 9. 
    What is NOT an advantage of using polymer inks for DPN?
    • A. 

      Properties of the polymer ink can be tuned to fit DPN deposition requirements.

    • B. 

      Polymer inks can be written to virtually any substrate.

    • C. 

      Polymer inks can have feature resolutions as small as 50 nm and as large as 10 microns

    • D. 

      Polymer inks always require a water meniscus

    • E. 

      All are true

  • 10. 
    What liquid ink properties can be inferred from this image?
    • A. 

      There is no water meniscus

    • B. 

      Liquid inks cannot be treated like molecular inks

    • C. 

      Minimum feature size is controlled by the liquid's interaction with the surface (i.e. its contact angle)

    • D. 

      All of the above