PH probe carbon quantum dot dispersion, 0.05 mg/mL, 50 mLProduct Type: Quantum dot dispersion
Research-grade laboratory product
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LABORATORY PROCUREMENT SUPPORT
For model selection, material format, solvent, concentration or configuration confirmation, contact our technical sales team.
E-MAIL: inquiry@atomfair.com
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Manufacturer: Atomfair LLC
Brand: ATOMFAIR®
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Manufacturer: Atomfair LLC
Brand: ATOMFAIR®
How does the emission color of the PH probe carbon quantum dot dispersion change with pH, and what are the optical trade-offs between the orange and yellow emission ranges?
The dispersion exhibits pH-dependent fluorescence: orange light emission at pH 4–5 and yellow light emission at pH 6–10. The liquid appearance also transitions from red (pH 4–6) to orange (pH 6–7) to yellow (pH 8–10). This dual-color response enables ratiometric pH sensing, but users must calibrate for the specific pH range of their application, as the emission intensity and color shift are not linear across the full pH 4–10 window.
Is this carbon quantum dot dispersion compatible with non-aqueous solvents or buffer systems for integration into existing assay workflows?
The dispersion is supplied in water at 0.05 mg/mL, so it is directly compatible with aqueous buffer systems. No information is provided regarding compatibility with organic solvents or non-aqueous media. Users should avoid solvent exchange or dilution with non-water miscible solvents unless validated, as the colloidal stability and pH-responsive fluorescence may be compromised.
What storage and handling conditions are required to maintain the colloidal stability and fluorescence performance of this quantum dot dispersion?
The product description does not specify explicit storage conditions, but as a research-grade aqueous dispersion, standard laboratory practices for nanomaterials apply: store in a cool, dark environment to prevent photodegradation and aggregation, avoid freezing, and use within a reasonable timeframe after opening. For detailed stability data and shelf life, contact the technical sales team at inquiry@atomfair.com.
This carbon quantum dot dispersion exhibits pH-dependent photoluminescence shifting from orange to yellow across pH 4-10, with a particle size of 2-5 nm, making it suitable for fluorescence-based pH sensing in aqueous environments. The fixed concentration of 0.05 mg/mL and 50 mL package size require dilution or concentration steps for specific assay protocols.
Positive
- pH-responsive luminescence: The dispersion exhibits distinct fluorescence color changes from orange (pH 4-5) to yellow (pH 6-10), enabling ratiometric pH sensing in aqueous environments.
- Small particle size: With a particle size of 2-5 nm, these carbon quantum dots are suitable for cellular imaging and bioanalytical applications requiring minimal steric interference.
Trade-offs
- Discrete pH response windows: The fluorescence color shifts at specific pH thresholds (pH 4-5 orange, pH 6-10 yellow) rather than providing a continuous linear response, which may limit precision in applications requiring fine pH discrimination.
- Fixed concentration and volume: Supplied only at 0.05 mg/mL in 50 mL, users requiring higher concentrations or different volumes must perform concentration steps or purchase additional units, adding handling time and potential for material loss.
Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.
To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.
Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD excl. heavy equipment). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
