Ludox tma colloidal silica

Manufactured by Merck Group

Ludox-TMA colloidal silica is a stable aqueous dispersion of amorphous silica particles. The silica particles have a narrow size distribution and a typical diameter of approximately 22 nanometers. Ludox-TMA is used as a reference material and calibration standard in various analytical techniques.

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Lab products found in correlation

Sodium chloride (nacl), by Merck Group (1 mentions) Cobalt nitrate, by Merck Group (1 mentions) Samarium nitrate, by Merck Group (1 mentions) Sodium hydroxide (naoh), by Merck Group (1 mentions) Citric acid, by Merck Group (1 mentions) Myoglobin from equine skeletal muscle, by Merck Group (1 mentions) Zetasizer nano, by Malvern Panalytical (1 mentions)

4 protocols using ludox tma colloidal silica

Colloidal Silica and Surfactant Study

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Following is the list of
chemicals and materials used in the study along with the supplier
and purity: Ludox-TMA colloidal silica (Sigma-Aldrich, wt % ∼30%),
C₁₂E₅ (Sigma-Aldrich, purity ≥98%), D₂O (Sigma-Aldrich, 99.9% D), NaCl (Sigma-Aldrich, purity ≥99%),
and cellulose dialysis membrane (Spectrum Spectra/Por, molecular weight
cutoff 12–14 kDa). All experiments were performed using 18.1
MΩ water from the Elga Flex 3 system.

Ma Y., Heil C., Nagy G., Heller W.T., An Y., Jayaraman A, & Bharti B. (2023). Synergistic Role of Temperature and Salinity in Aggregation of Nonionic Surfactant-Coated Silica Nanoparticles. Langmuir, 39(16), 5917-5928.

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Synthesis of Sm-Co Nanocomposites

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Samarium nitrate (Sm(NO₃)₃·6H₂O), LUDOX TMA colloidal silica (34 wt% SiO₂ suspension in water), cobalt nitrate (Co(NO₃)₂·6H₂O), citric acid (C₆H₈O₇), Sodium hydroxide (NaOH), potassium chloride (KCl), and calcium granular (Ca), all were bought from Sigma-Aldrich company and used without further purification.

Tang H., Mamakhel M.A, & Christensen M. (2021). High coercivity SmCo5 synthesized with assistance of colloidal SiO2. Scientific Reports, 11, 4682.

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Purification of Equine Myoglobin Using Silica NPs

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Myoglobin from equine skeletal
muscle (molecular weight of ∼17 kDa, purity ≥95%) was
purchased from Sigma-Aldrich. Commercially available LUDOX-TMA colloidal
silica (Sigma-Aldrich) was used as model spherical NPs. The silica
NP dispersion was dialyzed for 7 days using deionized water, and water
was changed every day to remove any undesired foreign molecules in
the dispersion. Sodium chloride (NaCl) (VWR, purity 99%) was used
as a 1:1 electrolyte to alter the range of electrostatic interactions.
All experiments were performed with ultrapure water of resistivity
18.2 MΩ cm.

Lee J.G., Lannigan K., Shelton W.A., Meissner J, & Bharti B. (2020). Adsorption of Myoglobin and Corona Formation on Silica Nanoparticles. Langmuir, 36(47), 14157-14165.

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Ludox TMA Colloidal Silica Adsorption Study

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Ludox TMA colloidal silica (Sigma-Aldrich) was used as the adsorbent in this study. The Ludox dispersion was dialyzed for 5 days against DI water (water changed 3 times per day) to remove remaining salt. Its mean particle diameter D was 21 nm (determined by dynamic light scattering). Its specific surface area a_s was 128 m²/g (value from the manufacturer), in agreement with the geometric surface area derived from the particle diameter, a_geom = 6/ρ_sD = 130 m²/g, based on a mass density of silica ρ_s of 2.20 g/cm³. The value of a_s/a_geom = 1.02 indicates a low surface roughness of the particles [32 (link)]. The electrophoretic mobility of the Ludox particles was determined by electrophoretic light scattering of a 1 wt% dispersion as described elsewhere [2 (link)], using a Nano Zetasizer (Malvern Instruments, UK). Three measurements, each consisting of at least 50 runs, were performed for each sample.
Lysozyme from chicken egg white lyophilized powder (Sigma-Aldrich, ≥40,000 units/mg protein, lot SLBH9534V, purity ≥90 %) and ß-lactoglobulin from bovine milk (Sigma-Aldrich, lot SLBC4958V, purity ≥90 %) were used in this study.

Meissner J., Prause A., Bharti B, & Findenegg G.H. (2015). Characterization of protein adsorption onto silica nanoparticles: influence of pH and ionic strength. Colloid and Polymer Science, 293(11), 3381-3391.

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