Carboxylic Acid Functionalized Superparamagnetic Nanoparticles

Name: Carboxylic Acid Functionalized Superparamagnetic Nanoparticles
Brand: Biosensis
SKU: SP-Carbox-50
Price: 1849.0 USD
Availability: InStock

Carboxylic acid coated PrecisionMRX® superparamagnetic iron oxide nanoparticles are monodisperse and highly negatively charged. They are designed for bioconjugation magnetic separation, drug delivery, and other aqueous applications requiring reactive carboxyl functionality.

Transmission Electron Microscopy (TEM) negative staining of COO-NPs

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Particle Core Diameter

25 + 2 nm (TEM)

Standard Deviation

<10%

Structure

Magnetite (Fe₃O₄)

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SKU: SP-Carbox-50

Size: 50 mg

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Price:

$1,849.00

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Ships: 1-2 business days

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Product Description

Monodisperse magnetite (Fe₃O₄) cores (25 ± 2 nm diameter, < 10 % SD) are sequentially coated with an oleic acid monolayer and an amphiphilic polymer bearing surface carboxylic acid groups, yielding stable aqueous dispersibility (~40-50 nm hydrodynamic Z-average, PDI < 0.1) and a high negative zeta potential (–50 to –60 mV in HPLC-grade water) . These nanoparticles are rigorously characterized by SAXS, TEM, dynamic light scattering, and zeta potential measurements to ensure uniformity and batch-to-batch consistency . Ideal for applications in bioconjugation, magnetic separation, drug delivery formulations, and surface functionalization in aqueous systems requiring reactive carboxyl functionalities.

Concentration

+/- 20 mg/mL (Fe)

Method of Analysis

Rigaku SmartLab Small Angle X-ray Scattering (SAXS); JEOL 1200EX Transmission Electron Microscope (TEM); ASTM Standard E394-09; Dynamic Light Scattering by Malvern Zetasizer Nano ZS

Storage

4°C, away from light; DO NOT FREEZE

Physical State

Liquid

Buffer

HPLC H₂O (only dilute using H₂O)

Structure

Magnetite (Fe₃O₄)

Coating Layer

Cores are coated with a monolayer of oleic acid and a monolayer of an amphiphilic polymer with carboxylic acid functionality.

Hydrodynamic Diameter

~40-50 nm (Z-average intensity), PDI <0.10

Zeta Potential

-50 to -60 mV

Particle Core Diameter

25 + 2 nm (TEM)

Standard Deviation

<10%

Usage Statement

For Research Use Only

Expiration

12 months from date of receipt

Synonyms

COO-NPs

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Carboxylic Acid Functionalized Superparamagnetic Nanoparticles

SKU: SP-Carbox-50

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