QUIZ NANOMATERIALS

• One nanometer is equivalent to...

  Answer: 10^-9 m
• Zero dimensional nanoparticles can be used for the following processes, except:

  Answer: Continuous Electricity Conduction
• The properties of nanomaterials are different from their bulk counterparts because of:

  Answer: The greater surface area over volume ratio
•  Nanotechnology can be created and developed with which

  approaches?

  A. Top-down Approach

  B. Bottom-up Approach

  Answer: Both A&B
• Imogolite, with a chemical formula of Al2SiO3(OH)4, is an important compound in the realm of 1 dimensional nanostructures. Given that it’s diameter can be shifted by adjusting the ratio of silicon and aluminum, which property would most likely be least affected if the diameter was lessened? 

  Answer: Biodegradability
• The following microscopes can see or scan nanomaterials, except: 

  Answer:  Compound Microscope
• Nanomaterials appear in many branches of science, except: 

  Answer: Astronomy
• The low ductility of carbon nanotubes are at a percentage of ____ at room temperature.

  Answer: 6-15%
• Single walled carbon nanotubes have diameters around:

  Answer:  0.5-2.0 nanometres
• The change between allotropic forms is triggered by the same forces that affect other structures EXCEPT: 

  Answer: Mass
• What is the approximate specific strength of carbon nanotubes

  Answer: 48,000 kN·m·kg−1
•  What is another term for nested closed fullerenes?

  Answer: Bucky Onions
• What is the tensile strength of a multiwalled carbon nanotube

   Answer: 63 gigapascals
• These are the potential applications of carbon nanotubes EXCEPT: 

  Answer:  Food-Manufacturing
• In cancer treatment, how could carbon nanotubes be used to target and destroy cancer cells specifically? 

  Answer:  By being coated with drugs or antibodies that specifically bind to cancer cells, delivering targeted treatment.
• A renewable energy company wants to enhance the efficiency and lifespan of polymer solar cells. They plan to replace a key component with graphene. Which component should they target, and why?

  Answer: The electrode, for improved conductivity and durability.
• A hospital needs a biosensor to quickly detect DNA mutations linked to cancer. Why is graphene a suitable material for this application?

  Answer: Its high electrical conductivity enhances signal detection.
• Which unique property of graphene results from the high mobility of its electrons at room temperature?

  Answer: High electrical conductivity
•  Compared to bulk graphite, graphene exhibits which of the following?

  Answer: Greater flexibility and strength
• Imagine you are tasked with designing a next-generation flat-screen display with faster response times and lower power consumption. How could carbon nanotubes contribute to this design?

  Answer: By leveraging their ability to emit electrons in an electric field to enhance the screen's brightness and response time.
• In nanomaterials that crystallize in layers, the layers themselves are held together by (van der Waals forces). This makes it possible to cleave off layers.
• Nanomaterials are defined as materials where the sizes of their individual building blocks are less than (100 nanometers)
• Nanomaterials are used for catalyzing reactions due to a substantial property they have which allows their particles to have a higher likelihood of coming in contact with reactants. Which property is this? (Surface Area)
• This term refers to materials whose properties remain equal, or the same, in all dimensions. (Isotropic)
• They are created when there is a lacking valence on an immobilized atom. They have a tendency to saturate themselves, and this leads to the formation of nanorods or nanotubes. (Dangling Bonds) 
• The carbon atoms of graphene are only covalently bound to __ other carbon atoms.  This creates a delocalized electron, which leads to its excellent conductivity compared to other allotropes of carbon. (Three)
• What is the classification of graphite, aerogel, and diamond, given that they’re being judged by their dimensionality as nanomaterials? (3D or 3 Dimensional Nanomaterials)
• What are the two broad classes of carbon nanotubes? (Single walled carbon nanotubes, Multiwalledcarbon nanotubes)
• What type of bond and graphene contributes to both its strength and flexibility?

  
  

  Answer: Graphene
• The fullerene family, its most famous member being (C60) is named after? (Buckminsterfullerene)
• Allotropy is the property of some chemical elements existing in two or more different forms, and is the combination of the two words: (other, tropos)
• What specific feature of carbon nanotubes determines whether they behave as metallic or semiconducting materials? (Orientation)
• Which electronic component utilizes the semiconducting properties of carbon nanotubes to control current flow in one direction? (Diodes)
• What property of carbon nanotubes allows them to function as transistors in small-scale circuits? (Semiconducting behavior)
•  Identify the specific type of carbon-carbon bonding hybridization in graphene that facilitates its exceptional tensile strength, flexibility, and electrical conductivity by allowing delocalized electrons to move freely across a planar hexagonal lattice. (sp2 hybridized bonding)
•  What is the approximate modulus of elasticity of graphene, comparable to other nanocarbons? (~1 TPa (terapascal))
• Despite its high electrical conductivity, this characteristic of graphene allows light to pass through it, making it an ideal material for transparent electronics. What is this property? ( Transparency)
• This process, critical to the first isolation of graphene, involves removing atomic layers of graphite via mechanical manipulation. What is its formal scientific name? (Micromechanical exfoliation)