Chapter 25, Nanomaterials, nanoscience, and nanotechnology Video Solutions, Shriver & Atkins’ Inorganic Chemistry

Problem 1

(a) Compare the surface area for two spherical objects: one has a diameter of $10 \mathrm{nm}$ and the other has a diameter of $1000 \mathrm{nm}$. (b) Describe whether these two objects are considered nanoparticles by using the size-based definition of a nanomaterial. (c) Using a surfacearea-related property, describe what must hold true for either of these objects to be considered nanoparticles using the size/properties-based definition of a nanomaterial.

Tyler Moulton

Numerade Educator

09:38

Problem 2

Quantum confinement bestows unique properties on semiconductor nanocrystals compared to the bulk semiconductor. For this to happen, some characteristic length that describes an electron in a crystal and the size of the crystal must be similar. Describe a characteristic length for an electron and how it becomes comparable to the particle size in quantum confinement.

Linda Winkler

Numerade Educator

01:10

Problem 3

Explain why quantum dots might be superior to organic fluorophores for bio-imaging applications.

Ajay Singhal

Numerade Educator

01:05

Problem 4

Compare and contrast the band energies for a quantum dot nanocrystal and a bulk semiconductor.

Lottie Adams

Numerade Educator

02:01

Problem 5

(a) Explain the difference between the top-down and bottomup methods of fabrication of materials. Be specific and provide one example of each. (b) Give one advantage and one disadvantage for each synthesis method.

Vivek Singh

Numerade Educator

01:45

Problem 6

(a) Give a definition for scanning probe microscopy that makes clear both what it is and why it is called scanning probe microscopy.
(b) Using a material of interest to you, pick any scanning probe microscopy method and describe how you might use it to characterize an important aspect of your material.

Lottie Adams

Numerade Educator

04:50

Problem 7

Distinguish between SEM and TEM. What is the principal difference in sample preparation and detection?

Sanjeev Kumar

Numerade Educator

01:55

Problem 8

(a) Describe the three basic steps in nanoparticle formation from solution.
(b) Explain why two steps should occur independently to achieve a uniform size distribution.
(c) What are stabilizer molecules used for in nanoparticle synthesis?

Vivek Singh

Numerade Educator

01:55

Problem 9

Explain whether vapour-phase or solution-based techniques typically lead to (a) larger size distributions in nanoparticle synthesis, (b) agglomerated particles that are strongly bonded to one another in so-called hard agglomerates.

Vivek Singh

Numerade Educator

01:46

Problem 10

(a) Draw a schematic diagram of a core-shell nanoparticle.
(b) Briefly describe how core-shell nanoparticles could be made using either vapour-phase or solution-based techniques.
(c) For what purpose would core-shell nanoparticles be used?

Vivek Singh

Numerade Educator

01:18

Problem 11

(a) Discuss the difference between homogeneous and heterogeneous nucleation from the vapour phase. (b) Which type of nucleation is preferred for the growth of a thin film in this process?
(c) Which type of nucleation is preferred for the growth of nanoparticles in this process?

Ly Tran

Numerade Educator

01:58

Problem 12

Describe the difference between a physical vapour and a chemical vapour with respect to the type and stability of the vapour species.

Jacob Paiste

Numerade Educator

01:37

Problem 13

(a) Superlattices of ordered quantum dots (QDs) and an overlaying semiconductor can be considered core-shell QD arrays. What is the purpose of building multiple layers on the QD? (b) What are the limitations on the order and types of semiconductors that can be put together?

Chai Santi

Numerade Educator

05:24

Problem 14

(a) Give two examples of applications of quantum wells. (b) Describe why quantum wells are used and if either molecular materials or traditional solid-state materials can exhibit similar properties. (c) How are quantum wells made?

Linda Winkler

Numerade Educator

01:53

Problem 15

Use any of the solid-state superlattices described in the chapter to explain why the use of nanostructured materials led to enhanced properties.

David Collins

Numerade Educator

01:22

Problem 16

(a) What is the relevance of self-assembly to the fabrication of nanomaterials?
(b) What role will it play in nanotechnology?

Ajay Singhal

Numerade Educator

01:37

Problem 17

Discuss briefly the features common to self-assembly processes.

Marissa Turner

Numerade Educator

01:38

Problem 18

Distinguish between static and dynamic self-assembly. Give an example of each type.

Mayank Tripathi

Numerade Educator

01:53

Problem 19

How is a self-assembled monolayer (SAM) comprising goldorganothiol linkages related to the cell membrane within our bodies? Use a sketch to make your comparison, define the term surfactant, and distinguish between the hydrophilic and hydrophobic regions.

Joanna Quigley

Numerade Educator

01:09

Problem 20

Define morphosynthesis. Give an example of how this approach can be used to control nanoarchitecture.

Dalton Hilovsky

Numerade Educator

01:21

Problem 21

$(\text { a })$ Describe the two classes of inorganic-organic nanocomposites based on their bonding types. (b) Give one example of a nanocomposite in each class.

Jacob Van Reet

Numerade Educator

03:14

Problem 22

(a) Explain why the state of dispersion of inorganic nanoparticles is important in inorganic-organic nanocomposites.
(b) Use the concept of oil and water dispersions to explain why highly dispersed inorganic nanoparticles might be difficult to achieve in these nanocomposites.

Shahina -

Numerade Educator

01:22

Problem 23

Give an example of a bionanomaterial and its application in nanotechnology.

Ajay Singhal

Numerade Educator

06:01

Problem 24

(a) Define biomimetics. (b) Describe biomimetics with respect to how artificial fossilization is used to create titania paper.

Jennifer Stoner

Numerade Educator

03:46

Problem 25

Describe why mechanical properties are a key metric of the quality of artificial bone materials. Use the example described in the text to explain how chemistry plays a major role in enhancing the mechanical properties of bionanocomposite bone material.

Dr. Anas Syed

Numerade Educator