- #1
bluejay27
- 67
- 3
If you were given a colloidal solution of quantum dots, how do you know that they are spherical in size?
Undergrad Are Quantum Dots Spherical? Identifying Size of Colloidal Solution
- Thread starter bluejay27
- Start date
-
- Tags
- Quantum Quantum dots Spherical
Click For Summary
To determine if quantum dots in a colloidal solution are spherical, one effective method is to smear the solution onto a glass substrate and analyze it using a scanning electron microscope (SEM). This imaging technique allows for high-resolution visualization of the quantum dots, enabling the assessment of their shape and size. The SEM can reveal the morphology of the dots, confirming their spherical nature if they appear round in the images. Accurate size measurement can also be conducted through image analysis software. This approach is crucial for applications in nanotechnology and materials science.
I am observing an irregular, aperiodic noise pattern in the reflection signal of a high-finesse optical cavity (finesse ≈ 20,000). The cavity is normally operated using a standard Pound–Drever–Hall (PDH) locking configuration, where an EOM provides phase modulation.
The signals shown in the attached figures were recorded with the modulation turned off. Under these conditions, when scanning the laser frequency across a cavity resonance, I expected to observe a simple reflection dip. Instead...
Similar threads
- · Replies 7 ·
- · Replies 6 ·
Undergrad
Pure semiconductor Quantum Dots?
- · Replies 1 ·
- · Replies 1 ·
- · Replies 1 ·
Undergrad
How Do Quantum Dots Emit UV Light?
- · Replies 6 ·
Undergrad
Emitting light to a Quantum dot
- · Replies 1 ·
- · Replies 6 ·
- · Replies 4 ·