11. Bio nanoengineering and environmental nanoengineering

0.0(0)
Studied by 0 people
call kaiCall Kai
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
GameKnowt Play
Card Sorting

1/3

encourage image

There's no tags or description

Looks like no tags are added yet.

Last updated 6:15 AM on 4/24/26
Name
Mastery
Learn
Test
Matching
Spaced
Call with Kai

No analytics yet

Send a link to your students to track their progress

4 Terms

1
New cards

What is biomimetic engineering?

  • many uses: artificial bone and muscles, photosynthesis

  • bone resists tension, torsion and compressive forces w nanostructures of mineral and collagen protein fibres

  • muscle made of fibre bundles connected to body joints via ligaments and tendons - biomimetic nanoscale muscle commonly uses electronically conducting polymers, dielectric elastomers or ionic polymer/metal composite

  • Photosynthesis - converts solar energy to chemical energy

2
New cards

What is the Gratzel cell?

  • dye-sensitive solar cell - DSSC

  • organic dye, like plant chlorophyll, captures photons and transfers energy to electrons

  • tethered dye molecules absorb photons and transfer energy to titanium dioxide semiconductor nanoparticles

  • visible light absorption is possible

  • DSSC overcomes difficulty in separating absorbers and charge separator materials - prevents recombination of electrons and holes

  • Electron in transition metal complex excited by photon transfer excited electron to conduction band of semiconductor through injection

  • semiconductor - charge carrier for electron transfer from dye molecule

  • max voltage able to deliver is difference between I-/I3 redox couple and Fermi level of semi conductor

  • modifications to cell design, electrolyte, dye materials can further increase cell efficiency

<ul><li><p>dye-sensitive solar cell - DSSC</p></li><li><p>organic dye, like plant chlorophyll, captures photons and transfers energy to electrons </p></li><li><p>tethered dye molecules absorb photons and transfer energy to titanium dioxide semiconductor nanoparticles</p></li><li><p>visible light absorption is possible </p></li><li><p>DSSC overcomes difficulty in separating absorbers and charge separator materials - prevents recombination of electrons and holes </p></li><li><p>Electron in transition metal complex excited by photon transfer excited electron to conduction band of semiconductor through injection </p></li><li><p>semiconductor - charge carrier for electron transfer from dye molecule </p></li><li><p>max voltage able to deliver is difference between I-/I3 redox couple and Fermi level of semi conductor </p></li><li><p>modifications to cell design, electrolyte, dye materials can further increase cell efficiency </p></li></ul><p></p>
3
New cards

What are medical applications of nanotech?

  • NPs for medical imaging

  • NPs for targeting cancer cells - functional ferromagnetic NPs to deliver anticancer drugs or separate cancer cells from bone marrow and other tissue

  • Nanoencapsulation for drug delivery - nanoscale polymer implants can slowly release drugs e.g. beta-lapachone has cytotoxic effects in a number of malignant human cell types or used for insulin delivery

4
New cards

What are bio applications of the QD?

  • narrow emission peaks allows to be used as a diagnostic where different diseases will be highlighted by a different colour

  • conjugation of QDs to biomolecules