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Quantum dots are semiconductor nanocrystals whose absorption and emission properties are influenced by their material composition, particle dimensions, core-shell structure and surface chemistry.

Quick Selection Procurement Summary

Product families	Available forms	Key Selection Parameter	Documentation/Support
CdS, CdSe, CdSe/ZnS, ZnCdSe/ZnS, CdTe and PbS; cadmium- and heavy-metal-free options are available in a separate category.	Non-polar solvent dispersions, water-dispersible products and dry powders, depending on the quantum-dot family and SKU.	Material composition, absorption and emission peak, photoluminescence FWHM, quantum yield, core/shell dimensions, surface ligand, solvent and concentration.	Product selection, custom requirements and technical documentation

Browse Quantum Dot Products Get Product Selection Help

Browse Quantum Dots By Form or Requirement

CdS Quantum Dots in Non-polar Solvents	CdSe Quantum Dots in Non-Polar Solvents	CdSe/ZnS Core-shell Quantum Dots
ZnCdSe/ZnS Core Shell Quantum Dots	CdTe Quantum Dots in dry powder form	PbS Quantum Dots in Non-Polar Solvents

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MKNano
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sku: MKN-CdSe/ZnS-620

CdSe/ZnS in Powder Emission: 620 nm

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MKNano
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sku: MKN-CdSe/ZnS-WS650

CdSe/ZnS in water Emission: 650 nm

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MKNano
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sku: MKN-CdSe/ZnS-T650

Non-Polar Solvents: CdSe/ZnS in Toluene Emission: 650 nm

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MKNano
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sku: MKN-CdSe-T610

CdSe in Toluene ABS: 610 nm Emm: 620-635 nm

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MKNano
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sku: MKN-CdTe-610

CdTe Emission: 610 nm

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MKNano
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sku: MKN-CdSe/ZnS-630

CdSe/ZnS in Powder Emission: 630 nm

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MKNano
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sku: MKN-CdSe/ZnS-T660

Non-Polar Solvents: CdSe/ZnS in Toluene Emission: 660 nm

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MKNano
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sku: MKN-CdSe-T620

CdSe in Toluene ABS: 620 nm Emm: 615-650 nm

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MKNano
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sku: MKN-CdTe-620

CdTe Emission: 620 nm

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MKNano
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sku: MKN-CdSe/ZnS-640

CdSe/ZnS in Powder Emission: 640 nm

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MKNano
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sku: MKN-CdSe-T640

CdSe in Toluene ABS: 640 nm Emm: 645-670 nm

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MKNano
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sku: MKN-CdTe-630

CdTe Emission: 630 nm

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MKNano
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sku: MKN-CdSe/ZnS-650

CdSe/ZnS in Powder Emission: 650 nm

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MKNano
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sku: MKN-CdTe-640

CdTe Emission: 640 nm

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MKNano
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sku: MKN-CdTe-650

CdTe Emission: 650 nm

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CdSe/ZnS in Powder Emission: 620 nm
CdSe/ZnS core/shell Quantum Dots in powder form Highly luminescent semiconductor nanocrystals coated with trioctylphosphine oxide. Readily soluble in toluene, chloroform, tetrahydrofuran, pyridine...

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CdSe/ZnS in water Emission: 650 nm
CdSe/ZnS in water Emission: 650 nmUV Peak: 640 (+/-10) nm Emission Peak: 650 (+/-10) nm FWHM (nm): 25-30 Core Dia (nm): 4-4.5; Shell Thickness (nm): 6-7 Total Dia (nm): 11-12 Product # MKN

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Non-Polar Solvents: CdSe/ZnS in Toluene Emission: 650 nm
CdSe/ZnS Quantum Dots with Oleic acid (OA) ligands in Toluene (also available in Hexane, Chloroform and other select solvents) PL FWHM (nm): 20-30 Quantum Yield >70%UV Peak: 640 (+/-10)

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CdSe in Toluene ABS: 610 nm Emm: 620-635 nm
Cadmium Selenide (CdSe) core Quantum Dots with Octadecyl amine (ODA) ligands in Toluene (also available in Hexane, Chloroform and other select solvents) PL FWHM (nm): 23-28 UV-Vis FWHM (nm): 22-26...

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CdTe Emission: 610 nm
Cadmium Telluride (CdTe) Quantum Dots, dry powder (dispersible in water) The QDs are enriched in Cd. The brutto formula can be expressed by Cd2-3Te1 The surface of CdTe is coated with...

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CdSe/ZnS in Powder Emission: 630 nm
CdSe/ZnS core/shell Quantum Dots in powder form Highly luminescent semiconductor nanocrystals coated with trioctylphosphine oxide. Readily soluble in toluene, chloroform, tetrahydrofuran, pyridine...

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Non-Polar Solvents: CdSe/ZnS in Toluene Emission: 660 nm
CdSe/ZnS Quantum Dots with Oleic acid (OA) ligands in Toluene (also available in Hexane, Chloroform and other select solvents) PL FWHM (nm): 20-30 Quantum Yield >70%UV Peak: 650 (+/-10)

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CdSe in Toluene ABS: 620 nm Emm: 615-650 nm
Cadmium Selenide (CdSe) core Quantum Dots with Octadecyl amine (ODA) ligands in Toluene (also available in Hexane, Chloroform and other select solvents) PL FWHM (nm): 23-28 UV-Vis FWHM (nm): 22-26...

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CdTe Emission: 620 nm
Cadmium Telluride (CdTe) Quantum Dots, dry powder (dispersible in water) The QDs are enriched in Cd. The brutto formula can be expressed by Cd2-3Te1 The surface of CdTe is coated with...

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CdSe/ZnS in Powder Emission: 640 nm
CdSe/ZnS core/shell Quantum Dots in powder form Highly luminescent semiconductor nanocrystals coated with trioctylphosphine oxide. Readily soluble in toluene, chloroform, tetrahydrofuran, pyridine...

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CdSe in Toluene ABS: 640 nm Emm: 645-670 nm
Cadmium Selenide (CdSe) core Quantum Dots with Octadecyl amine (ODA) ligands in Toluene (also available in Hexane, Chloroform and other select solvents) PL FWHM (nm): 23-28 UV-Vis FWHM (nm): 22-26...

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CdTe Emission: 630 nm
Cadmium Telluride (CdTe) Quantum Dots, dry powder (dispersible in water) The QDs are enriched in Cd. The brutto formula can be expressed by Cd2-3Te1 The surface of CdTe is coated with...

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CdSe/ZnS in Powder Emission: 650 nm
CdSe/ZnS core/shell Quantum Dots in powder form Highly luminescent semiconductor nanocrystals coated with trioctylphosphine oxide. Readily soluble in toluene, chloroform, tetrahydrofuran, pyridine...

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CdTe Emission: 640 nm
Cadmium Telluride (CdTe) Quantum Dots, dry powder (dispersible in water) The QDs are enriched in Cd. The brutto formula can be expressed by Cd2-3Te1 The surface of CdTe is coated with...

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CdTe Emission: 650 nm
Cadmium Telluride (CdTe) Quantum Dots, dry powder (dispersible in water) The QDs are enriched in Cd. The brutto formula can be expressed by Cd2-3Te1 The surface of CdTe is coated with...

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What Are Quantum Dots?

Quantum dots are tiny (usually 2 - 10 nm) semiconductor crystals whose electrical and optical behaviour is dependent on quantum confinement. Their absorption and emission characteristics depend on the material composition, particle dimensions, core-shell structure and surface chemistry. Within a semiconductor system, changing the particle size can change the emission wavelength. The final optical response is also influenced by the composition and surface design.

Quantum dots are often selected as a complete formulation rather than by particle size alone. Researchers should do practical product selection based on key parameters such as absorption peak, photoluminescence emission peak, FWHM, quantum yield, shell dimensions, surface ligand, concentration, solvent and storage requirements.

Quantum Dot Types & Quantum Dot Product Family Comparison

Quantum Dot Family	Structure / Type	Available Medium	Selection Direction
CdS quantum dots	Core quantum dots	Non-polar solvents	UV-to-visible optical research; compare absorption peak, emission range, crystal size and ligand.
CdSe quantum dots	Core quantum dots	Non-polar solvents	Visible-wavelength research; compare absorption/emission values, FWHM, quantum yield and solvent.
CdSe/ZnS quantum dots	Core-shell quantum dots	Water, non-polar solvents and dry powder	Visible-emission research requiring a choice of solvent, ligand, core diameter, shell thickness and total diameter.
ZnCdSe/ZnS quantum dots	Alloyed core-shell quantum dots	Product-dependent	Visible-emission studies where composition and core-shell design are important selection factors.
CdTe quantum dots	Core quantum dots	Dry powder; selected products are water-dispersible	Visible-emission research requiring review of surface coating, emission wavelength and redispersion instructions.
PbS quantum dots	Core quantum dots	Non-polar solvents	Near-infrared research; compare emission peak, FWHM, concentration, ligand and solvent.
Cadmium- and heavy-metal-free quantum dots	InP/ZnS, Mn/ZnSe, CuInS/ZnS and selected related systems	Water, non-polar solvents or powder depending on product	Projects requiring alternative compositions; evaluate each product for optical performance, surface chemistry and application compatibility.

Product availability, wavelengths, concentration, ligands and physical form vary by SKU. The individual product page and current technical documentation are the controlling sources for product-specific values.

Quantum Dots: Technical Selection Guide

Specification	What It Describes	What to Verify
Material composition	Core, shell, alloy or dopant chemistry	Confirm the complete product composition
Emission wavelength	Location of the reported photo luminescence peak	Match the required spectral region
Absorption data	Interaction with the excitation wavelength	Check whether the value is a peak, edge or spectrum
Quantum yield	Emitted photons relative to absorbed photons under stated conditions	Review the method, solvent, reference and concentration
PL FWHM	Width of the emission peak at half maximum	Evaluate with emission wavelength and test conditions
Particle size	Physical or hydrodynamic particle dimensions	Confirm the reported method and size basis
Core-shell structure	Materials forming the core and surrounding shell	Review both materials and available structural data
Surface ligand	Surface molecule or functional group	Confirm compatibility with the required medium or matrix
Solvent or medium	Carrier in which the quantum dots are supplied	Check processing and formulation compatibility
Concentration	Amount of quantum-dot material in a dispersion	Confirm the unit and reporting basis
Documentation	Information supporting technical and procurement review	Request the current specification, SDS and COA availability

How to Choose Right Quantum Dots?

Start with the semiconductor composition

Select a material family based on the required spectral region, device architecture, research objective and handling constraints. CdS, CdSe, CdTe and PbS products are not interchangeable. Heavy-metal-free alternatives should be evaluated using their own optical and formulation specifications.
Define & decide the target absorption and emission requirement

Specify whether the project is driven by excitation wavelength, absorption peak, emission peak, a visible colour range or a near-infrared region. Size can influence wavelength within a material system, but composition, alloying, shell structure and surface chemistry also contribute.
Decide between core and core-shell products

Core quantum dots contain the primary semiconductor nanocrystal. Core-shell quantum dots add a second semiconductor layer around the core. The products can be compared using the reported core diameter, shell thickness, total diameter and optical data. Do not assume that all core-shell systems perform the same way.
Select the surface ligand and solvent based on the process

Water-dispersible quantum dots are more suitable for aqueous workflows, while hydrophobic ligand systems are generally supplied in non-polar solvents like Toluene. Dry powders may need controlled redispersion in compatible solvents. Before ordering, check the solvent, concentration, ligand and redispersion guidance.
Compare FWHM and quantum yield under relevant conditions

FWHM is the emission bandwidth, and quantum yield is the photoluminescence efficiency. Their values vary depending on the composition, wavelength, surface ligand, solvent, concentration, measurement method and storage history. When the tolerances are critical, use the individual SKU page and request supporting data.
Confirm which particle-size value is being reported

TEM commonly reports inorganic particle dimensions. Light-scattering methods estimate hydrodynamic size in dispersion and may include the ligand, coating and aggregation effects. Optical spectroscopy can give indirect, material-specific information related to quantum confinement. When comparing products, check the value and the measurement method.
Choose the appropriate supply form and quantity

Choose a concentrated dispersion, ready-to-use colloidal solution or dry powder based on dilution requirements, process compatibility, storage capability and the amount needed. Contact MKNano before scaling from bench work to larger quantities because packaging, concentration and lead time can vary by formulation.

Key Quantum Dot Properties/Features

Property	Why It Matters
Material composition	The semiconductor material determines the base electronic structure and the broad spectral region available to the product family.
Absorption peak	The wavelength at which the product shows a specified absorption feature.
Emission peak	The wavelength at which photoluminescence intensity reaches its maximum. Product pages should state the nominal value and tolerance.
Photoluminescence FWHM	Full-Width Half-Maximum (FWHM) is the width of the emission band. A smaller value indicates a narrower emission peak
Quantum yield	It is the ratio of the emitted photons to absorbed photons under stated measurement conditions. Compare the values only when the method and formulation are relevant.
Core / shell / total size	Core-shell products may report core diameter, shell thickness and total inorganic diameter separately. These values should not be treated as interchangeable.
Hydrodynamic size	It is the solution-based size which includes the inorganic particle, surface ligand (coating) and associated solvation. It can differ from the TEM dimensions.
Surface ligand	It influences the solvent capability, colloidal stability, functionalisation and integration into polymers, devices or biological research systems.
Solvent and concentration	The dispersion medium and concentration affect handling, dilution, deposition and compatibility with the intended process.

Quantum Dot: Available Forms and Surface Chemistry

Quantum Dots in Non-Polar Solvents

MKnano supplies selected quantum dots in non-polar solvents. Before buying, verify the:

Exact solvent
Product concentration
Surface ligand
Storage conditions
Compatibility with the intended formulation

A change in solvent, ligand or processing conditions may alter dispersion behaviour.

Quantum Dots in Water

MKnano offers selected quantum dots in aqueous dispersions. Water dispersibility does not guarantee that the product is non-toxic, biocompatible and safe for medical or regulated use. Before purchasing, verify the exact composition, surface chemistry and current documentation.

Quantum Dots in Dry Powder Form

Mknano offers selected quantum dots in dry powder form. Before handling or preparing a dispersion, check the current SDS and product instructions. Powder behaviour depends on the particle size, surface chemistry, morphology, medium and processing conditions.

Applications Of Quantum Dot

Quantum dots are used in research where controlled optical absorption, photoluminescence or nanoscale semiconductor behaviour is required. Suitability depends on the complete product specification and the conditions of the intended experiment or device.

Research Area	Important Product Factors
Displays and light-emitting research	Quantum dot LEDs, colour-conversion layers and photoluminescent materials where emission wavelength, FWHM and quantum yield are important.
Solar cells and photodetectors	Light-absorbing or photoactive layers where bandgap, absorption range, charge transport, ligand exchange and film formation must be evaluated.
Optical sensors and fluorescent labels	Research systems that use wavelength-specific fluorescence. Surface chemistry, stability, functionalization and application-specific safety requirements are critical.
Materials science and nanocomposites	Integration into polymers, coatings and composite systems where dispersion, interfacial compatibility and optical stability affect performance.
Catalysis and photocatalysis research	Studies involving photoexcited charge carriers, surface reactions or hybrid nanomaterial systems. Product suitability should be validated experimentally.
Bioimaging and Labelling Research	Quantum dot systems that have been studied in fluorescence labelling and bioimaging research. Research use does not mean that the specific Mknano product is approved for medical use, diagnostics, pharmaceutical, implantable, or human use. It requires product-specific evidence, independent testing and regulatory review.
Near-infrared research	PbS and other suitable material systems may be evaluated for NIR emission or absorption applications, subject to product-specific wavelength and handling requirements.

Which Quantum Dot Should I Choose?

Application Requirement	Suggested Product	Buyer Guidance
UV or blue-region optical research	CdS quantum dots	Check the emission range, absorption peak, particle size, and non-polar solvent compatibility.
Visible fluorescence or optoelectronic research	CdSe or CdSe/ZnS quantum dots	Select by the required emission wavelength, FWHM, quantum yield, ligand and carrier.
Core-shell passivation and higher photoluminescence direction	CdSe/ZnS or ZnCdSe/ZnS	Verify the core and shell dimensions, total diameter, solvent and surface ligand.
Water-based fluorescence or sensing research	Water-dispersible CdSe/ZnS or a suitable cadmium-free family	Check the surface ligand functionality, hydrodynamic size, concentration, pH compatibility and intended research conditions.
Dry-powder formulation	CdTe or CdSe/ZnS powder, depending on wavelength and solvent needs	Check redispersibility, compatible solvents, surface coating and storage instructions.
Near-infrared detection or sensing research	PbS quantum dots	Select by the required NIR emission wavelength, concentration, solvent, ligand and FWHM.
Cadmium- or heavy-metal-restricted project	InP/ZnS, Mn/ZnSe, CuInS/ZnS or ZnCuInS/ZnS, subject to the exact requirement	Verify the restricted substances, target wavelength, quantum yield, and formulation compatibility
Non-standard wavelength, solvent or surface chemistry	Custom technical consultation	Provide the target wavelength, solvent, ligand, concentration, quantity and intended application.

Need help selecting a quantum dot? - Contact Mknano
For application-specific assistance, contact MKNano with your target wavelength, material, solvent, surface functionality, concentration, required quantity and intended research use.

MKnano Quantum Dots: Safety, Storage and Handling

Quantum-dot handling requirements depend on the semiconductor composition, solvent, ligand, concentration and physical form. Review the latest Safety Data Sheet for the selected SKU before use. Follow suitable controls for nanoparticle powders, solvent vapours and accidental exposure, and comply with applicable workplace, transport, waste and environmental requirements.

The handling requirements depend on the semiconductor composition, solvent, surface ligand, concentration, and physical form. Go through the latest SDS (Safety Data Sheet) for the selected product SKU before use.

Store each product according to its product-specific instructions. Minimise unnecessary exposure to heat, light, oxygen and repeated contamination where these factors may affect colloidal or optical stability. Do not rely on a category-page summary as a substitute for the individual SDS or technical specification.

Frequently Asked Questions About Quantum Dots

Q. Which quantum-dot materials does MKnano offer?

A. MKnano lists selected CdSe, CdSe/ZnS, CdS, CdTe, PbS, ZnCdSe/ZnS, InP/ZnS, Mn/ZnSe, CuInS/ZnS and ZnCuInS/ZnS quantum-dot systems. Available forms and specifications vary by product.

Q. How do I select an emission wavelength?

A. Specify the target emission peak and acceptable tolerance, then review the matching products within the appropriate material family. Do not select by colour name alone. Also compare excitation or absorption requirements, FWHM, quantum yield, solvent and ligand.

Q. What is the difference between core size, total diameter and hydrodynamic size?

A. Core size describes the primary semiconductor nanocrystal. A core-shell product can also report shell thickness and total inorganic diameter. Hydrodynamic size is measured in dispersion and may include the surface ligand or coating and associated solvation. These measurements are not interchangeable.

Q. Should I choose water-dispersible, non-polar or dry-powder quantum dots?

A. Choose the form that is compatible with the intended process. Water-dispersible products suit aqueous workflows; hydrophobic-ligand products are typically used in compatible non-polar solvents; dry powders require confirmation of redispersion and solvent compatibility.

Q. Can I get SDS (Safety Data Sheet) and COA (Certificate of Analysis)?

A. Customers can request the current SDS, product specification and Certificate of Analysis availability for the selected product. Available documents and reported values may vary by product and lot.

Q. How is quantum-dot size measured?

A. For inorganic particle dimensions, TEM is usually used. Light scattering methods are used to measure the hydrodynamic size in a liquid, but it can be affected by the coatings and aggregation. Absorption and emission spectroscopy provide indirect and material-specific information related to quantum confinement.

Q. Are cadmium- and heavy-metal-free quantum dots available?

A. Yes. MKNano has a separate category containing selected InP/ZnS, Mn/ZnSe, CuInS/ZnS and related products. Available solvent, surface chemistry, wavelength and form vary by product.

Q. Can MKNano provide custom quantum dots?

A. Custom wavelength, material, solvent, surface chemistry, concentration, packaging or quantity may be possible for selected systems. Contact MKNano with the complete technical requirement so feasibility can be confirmed.

Need Quantum Dots for Your Research or Product-Development Project?
Browse the available products or contact MKnano with your wavelength, solvent, ligand, concentration and quantity requirements.

Technical Notice: This content provides general technical information, not application-specific engineering or safety advice. Results depend on product grade, materials, methods, and operating conditions. Review the current SDS, TDS and product instructions, and independently test and confirm suitability before use. [Read the full Technical Information Disclaimer.]

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Quantum Dots for Research and Industry: CdSe, CdTe, PbS & Core-Shell Quantum Dots

Quick Selection Procurement Summary

Browse Quantum Dots By Form or Requirement

MKNano

sku: MKN-CdSe/ZnS-620

MKNano

sku: MKN-CdSe/ZnS-WS650

MKNano

sku: MKN-CdSe/ZnS-T650

MKNano

sku: MKN-CdSe-T610

MKNano

sku: MKN-CdTe-610

MKNano

sku: MKN-CdSe/ZnS-630

MKNano

sku: MKN-CdSe/ZnS-T660

MKNano

sku: MKN-CdSe-T620

MKNano

sku: MKN-CdTe-620

MKNano

sku: MKN-CdSe/ZnS-640

MKNano

sku: MKN-CdSe-T640

MKNano

sku: MKN-CdTe-630

MKNano

sku: MKN-CdSe/ZnS-650

MKNano

sku: MKN-CdTe-640

MKNano

sku: MKN-CdTe-650

What Are Quantum Dots?

Quantum Dot Types & Quantum Dot Product Family Comparison

Quantum Dots: Technical Selection Guide

How to Choose Right Quantum Dots?

Start with the semiconductor composition

Define & decide the target absorption and emission requirement

Decide between core and core-shell products

Select the surface ligand and solvent based on the process

Compare FWHM and quantum yield under relevant conditions

Confirm which particle-size value is being reported

Choose the appropriate supply form and quantity

Key Quantum Dot Properties/Features

Quantum Dot: Available Forms and Surface Chemistry

Quantum Dots in Non-Polar Solvents

Quantum Dots in Water

Quantum Dots in Dry Powder Form

Applications Of Quantum Dot

Which Quantum Dot Should I Choose?

MKnano Quantum Dots: Safety, Storage and Handling

Frequently Asked Questions About Quantum Dots

Q. Which quantum-dot materials does MKnano offer?

Q. How do I select an emission wavelength?

Q. What is the difference between core size, total diameter and hydrodynamic size?

Q. Should I choose water-dispersible, non-polar or dry-powder quantum dots?

Q. Can I get SDS (Safety Data Sheet) and COA (Certificate of Analysis)?

Q. How is quantum-dot size measured?

Q. Are cadmium- and heavy-metal-free quantum dots available?

Q. Can MKNano provide custom quantum dots?