NAT Tool
Nanomaterials Assessment Tool
NAT — Evaluate and score nanomaterials across 16 criteria
1. Materials and reagents
1
Synthesis precursors
What are the synthesis precursors
10 points
Natural
7 points
Natural and chemicals
3 points
Chemicals only
2
Solvent pictograms
How many pictograms?
10 points
Water or green solvents
8 points
One pictogram (warning signal word)
6 points
One pictogram (danger signal word) OR Two pictogram (warning signal word)
4 points
Two pictogram (danger signal word) OR Three pictogram (warning signal word)
1 point
More than three pictogram
3
Solvent amount
What is the amount (gm or mL)
10 points
< 10
7 points
10-100
3 points
> 100
4
Presence of capping or stabilizing material
What is the type of stabilizer
5 points
No stabilizer or green stabilizer
3 points
Combination of chemical and green stabilizers
1 point
Chemicals
2. Sustainability of synthesis
5
Synthesis conditions
What is the Synthesis condition
5 points
Room temperature or ≤100°C (< 1hr)
3 points
Room temperature or ≤100°C (>1hr) OR High temperature (<1hr) OR Cooling to 0
1 point
High temperature (>1hr) OR Cooling < 0
6
Energy consumption
What is the energy consumption
5 points
≤ 0.1 kWh
3 points
≤ 1.5 kWh
1 point
> 1.5 kWh
7
Production yield
What is the production yield
10 points
High yield (75-100%)
7 points
Moderate yield (50-76%)
3 points
Low yield (< 50%)
8
Emission of gases and vapours
What are the Emission of gases and vapours
5 points
No harmful emissions
3 points
Moderate emissions with manageable control
0 points
High emissions with environmental impact
9
Purification needed
5 points
No purification needed
0 points
Purification required
10
Characterization techniques
What is the number of characterization techniques
5 points
Fully characterized
3 points
Semi characterized
1 point
Not characterized
3. Properties of nanomaterials
11
Stability over time
What is the stability
5 points
> one month
3 points
> One week
1 point
< one week
12
Storage conditions
What are the conditions
5 points
Room temperature
3 points
Cold temperature refrigerator (2-8°C)
1 point
Freezing
13
Cytotoxicity
Is it studied
5 points
Yes
0 points
No
4. Applicability of nanomaterials
14
Number of applications
What are the application numbers
5 points
3 applications
4 points
2 applications
3 points
1 application
15
Nature of sensing applications
Quantitative / Qualitative analysis
5 points
Quantitative analysis
3 points
Qualitative analysis only
5 points
Not applicable
16
Cost of the compound
What is the cost
5 points
≥ 5 $
4 points
≥ 50 $
3 points
≥ 100 $
Calculate NAT Score
Results update automatically when you change any answer