Education Standards
Quantum Dots
Overview
The purpose of this activity is to show that nanosize particles of a given substance often exhibit different properties and behavior than macro or micro size particles of the same material. The property studied in this activity is the absorption and reflection of light which is based on energy levels that are determined by the size and bonding arrangements of the materials.
Standards
HS‐PS1‐1. Use the periodic table as a model to predict the relative properties of elements based on the patterns of electrons in the outermost energy level of atoms.
HS‐PS2‐6. Communicate scientific and technical information about why the molecular‐level structure is important in the functioning of designed materials.
HS‐PS4‐3. Evaluate the claims, evidence, and reasoning behind the idea that electromagnetic radiation can be described either by a wave model or a particle model, and that for some situations one model is more useful than the other.
HS‐PS4‐4. Evaluate the validity and reliability of claims in published materials of the effects that different frequencies of electromagnetic radiation have when absorbed by matter.
Learning Objectives
Students will be able to calculate the wavelength, frequency and energy of light.
Materials
Need classroom copies of Quantum dot lab.. Also need set of quantum dots.
Procedure
Get started/Drill/Do Now: (What meaningful activity will students complete as soon as they enter the classroom?)
BW-Vocabulary-Define quantum dot and what are they used for?
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Engage/Motivation: (How will student interest be sparked? Is there prior knowledge that should be tapped? Is there vocabulary that must be cleared? Is there brainstorming that student need to complete before the lesson begins?) Demonstration Warmup- Demonstrate Show resolution of TV pictures |
Whole Group Instruction: (Focus lessons [explicit teaching/modeling, strategy demonstration, activate prior knowledge], shared reading, shared writing, discussion, writing process.) Reading: Google Drive, Folder Nano 2016, file: Lesson 5, Nanolesson quantum dots |
Group Practice/Small Group Instruction: (teacher-facilitated group discussion, student or teacher-led collaboration, student conferencing, re-teaching or intervention, writing process) Experiment: Google Drive, Folder Nano 2016, file: Lesson 5, Nanolesson Quantum Dots |
Independent Practice: (individual practice, discussion, writing process.) Pair and share lab results and answer the post lab question. Collect next day
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Evaluate Understanding/Assessment: (How will I know if students have achieved today’s objective?) Exit Question-What applications can be used for quantum dots.
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Closing Activities/Summary: (How will I tie up loose ends, reinforce/revisit the objective and connect the lesson to the unit?) Video: Blendspace, Nano Scale Lesson, Tile 19, Quantum Dots TV
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Enrichment/Extension/Re-teaching/Accommodations: (How will my lesson satisfy the needs of all learners?)
Video: Blendspace, Nano Scale Lesson, Tile 20, Quantum Dots Explained
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Credits
This learning module was created by Linda Monroe, a participant in Indiana University-Purdue University’s NSF-Funded “Nanotechnology Experiences for Students and Teachers (NEST)” Program (Award # 1513112).