Semiconductor Nanoparticles Design Service

CD Bioparticles is a leading provider of innovative and customized solutions in the field of nanotechnology. We are proud to provide our professional semiconductor nanoparticle design services, which is a comprehensive platform for developing and optimizing high-quality semiconductor nanocrystals. These materials are commonly referred to as quantum dots (QDs) and are at the forefront of modern technology due to their unique size dependent optical and electronic properties. From quantum computing and advanced displays to biomedical imaging and solar energy, semiconductor nanoparticles are revolutionizing numerous industries. Our service aims to help you leverage this potential by providing tailored materials to meet your specific research or commercial application needs.

Figure 1. Semiconductor Nanoparticles Design Service.

The Power of Semiconductor Nanoparticles

Semiconductor nanoparticles are a type of material that exhibits quantum confinement phenomena. When their size decreases to the nanoscale, their electronic structure changes, resulting in size tunable properties. This means that by simply changing the size of nanoparticles, we can precisely control their optical and electronic behavior. The key attributes include:

• Size adjustable emission: The color of light emitted by quantum dots can be fine tuned by adjusting their size. Larger dots emit red light, while smaller dots emit blue light. This allows for the creation of displays with wider color gamut and highly specific fluorescent probes for biological imaging.
• High quantum yield: These nanoparticles are highly effective in converting absorbed light into emitted light, making them an ideal choice for applications that require high brightness and photostability.
• Narrow emission spectrum: Unlike traditional organic dyes, quantum dots emit light in a very narrow wavelength range, which can prevent spectral overlap and is crucial for multi-channel detection in diagnosis.
• Long term light resistance: They have strong resistance to photobleaching and can be used for long periods of time in demanding applications such as long-term cell tracking.

Our Services

Our services leverage these advantages to provide you with materials that are not only powerful but also have excellent performance.

Material Composition

We offer a diverse range of semiconductor materials to suit various applications, including:

• Cadmium-Based Systems: CdSe, CdTe, and CdS quantum dots, known for their narrow emission spectra and high quantum yields, ideal for display technologies and fluorescence imaging.
• Heavy-Metal-Free Alternatives: InP/ZnS, CuInS₂/ZnS, and Si nanoparticles, designed to meet strict regulatory requirements for biomedical and environmental applications.
• Binary and Ternary Alloys: Alloyed nanoparticles (e.g., CdSeS, ZnCdS) with tunable bandgaps, enabling emission across a broader wavelength range.
• Core-Shell Structures: Nanoparticles with protective shells (e.g., CdSe/ZnS, InP/ZnS) to enhance photostability, reduce toxicity, and improve quantum yield.

Size and Shape Control

The optoelectronic properties of semiconductor nanoparticles are strongly dependent on size and morphology, which we precisely control:

• Size Tuning: Nanoparticles ranging from 2 nm to 20 nm in diameter, with size distributions as narrow as ±5% to ensure uniform optical properties. Smaller particles emit at shorter wavelengths (e.g., blue/green), while larger particles emit in the red/near-infrared range.
• Shape Engineering: Spherical quantum dots for isotropic properties, rod-shaped nanocrystals (quantum rods) for polarized emission, and tetrapods for enhanced charge transport in photovoltaic devices.

Surface Functionalization

Surface modification is critical for optimizing dispersion, biocompatibility, and device integration:

• Hydrophobic Coatings: Alkyl thiols or oleic acid ligands for dispersion in non-polar solvents (e.g., toluene, chloroform), suitable for optoelectronic device fabrication.
• Hydrophilic Modification: PEGylation, amine, or carboxyl functionalization to enable water solubility, essential for biomedical applications such as in vivo imaging and biosensing.
• Bioconjugation: Covalent attachment of antibodies, peptides, or nucleic acids for targeted delivery and specific biomolecular recognition.
• Ligand Exchange: Replacement of native ligands with functional molecules to enhance charge injection in solar cells and light-emitting diodes (LEDs).

Optical and Electronic Property Tuning

We tailor key optoelectronic properties to match application requirements:

• Emission Wavelength: Precise control over emission from ultraviolet (UV) to near-infrared (NIR) regions (300 nm to 1500 nm) by adjusting particle size and composition.
• Quantum Yield: Optimization to achieve quantum yields exceeding 90% for fluorescence applications, with options for stable single-photon emission for quantum computing.
• Photostability: Enhancement through core-shell engineering and surface passivation to minimize photobleaching, critical for long-term imaging and device operation.
• Electrical Conductivity: Tuning via doping (e.g., n-type or p-type doping of silicon nanoparticles) for applications in transistors and energy storage.

Technical Expertise and Comprehensive Methods

CD Bioparticles uses the most advanced synthesis technology to produce high-quality semiconductor nanoparticles:

• Colloidal synthesis: a wet chemical method that uses organic solvents and surfactants to control particle growth, achieving precise size and shape control.
• Hot injection technology: Quickly inject precursors into hot surfactants to achieve narrow size distribution and high crystallinity.
• Thermal decomposition: Control the decomposition of organic metal precursors to produce uniform nanoparticles on a large scale.

Our Advantages

Specific Application Expertise

Our semiconductor nanoparticle design services are tailored for a wide range of applications:

• Display and Lighting: Customized QDs for next-generation QLED TVs, displays, and LED lighting, providing excellent color accuracy and energy efficiency.
• Biomedical imaging and diagnosis: Highly specific and light resistant quantum dots for in vitro and in vivo imaging, immunoassays, and flow cytometry.
• Solar energy: Customized nanocrystals are used for third-generation solar cells (quantum dot solar cells) to improve light absorption and conversion efficiency.
• Quantum computing: Design and synthesize highly uniform, single photon emitting quantum dots for quantum information processing and communication.
• Sensors: Developing new photoelectric sensors for chemical and biological detection.

Workflow

Summary

Choosing CD Bioparticles for your semiconductor nanoparticle needs means partnering with a team of leading experts who are dedicated to your project's success. Our commitment to quality, innovation, and customer satisfaction sets us apart. With our flexible service model, state-of-the-art technology, and deep scientific expertise, we are uniquely positioned to help you push the boundaries of what is possible with semiconductor nanoparticles.