Publications by Quy Ong Khac | EPFL Graph Search

Cholesterol-rich lipoprotein nanoparticles for cancer diagnosis

Francesco Stellacci, Quy Ong Khac, Lixia Wei

A method for the diagnosis of cancer in a sample of cholesterol-rich lipoprotein nanoparticles obtained from a test subject includes: (a) determining the protein level of at least one protein in the sample of isolated cholesterol-rich lipoprotein nanoparti ...

2025

Lyotropy as a Design Consideration for Ultra-Small Protein Nanoparticles via Electrohydrodynamic Jetting

Francesco Stellacci, Quy Ong Khac

Protein-based nanoparticles offer tailored bioactivity and biodegradability that are distinct from their synthetic polymeric counterparts. Precise engineering of physical properties, especially size, of nanoparticles using electrohydrodynamic (EHD) jetting ...

2025

Size distributions and fractograms of cholesterol-rich lipoprotein nanoparticles for cancer diagnosis

Francesco Stellacci, Quy Ong Khac, Lixia Wei

The present invention relates to a method for the diagnosis of cancer in a sample of cholesterol-rich lipoprotein nanoparticles obtained from a test subject comprising (α) determining the size distribution or the fractogram in chromatography of the cholest ...

2025

Versatile Capillary Cells for Handling Concentrated Samples in Analytical Ultracentrifugation

Francesco Stellacci, Quy Ong Khac, Xufeng Xu

In concentrated macromolecular dispersions, far-from-ideal intermolecular interactions determine the dispersion behaviors including phase transition, crystallization, and liquid-liquid phase separation. Here, we present a novel versatile capillary-cell des ...

Amer Chemical Soc2024

A Synthetic Multivalent Lipopeptide Derived from Pam3CSK4 with Irreversible Influenza Inhibition and Immuno-Stimulating Effects

Francesco Stellacci, Li Tang, Bruno Emanuel Ferreira De Sousa Correia, Quy Ong Khac, Francesca Olgiati, Pablo Gainza Cirauqui, Lixia Wei, Armand Kurum, Yong Zhu

The activation of the host adaptive immune system is crucial for eliminating viruses. However, influenza infection often suppresses the innate immune response that precedes adaptive immunity, and the adaptive immune responses are typically delayed. Dendrit ...

Wiley-V C H Verlag Gmbh2024

Ligand concentration determines antiviral efficacy of silica multivalent nanoparticles

Francesco Stellacci, Quy Ong Khac, Xufeng Xu, Heyun Wang, Paulo Henrique Jacob Silva, Rémi Andréa La Polla

We have learned from the recent COVID-19 pandemic that the emergence of a new virus can quickly become a global health burden and kill millions of lives. Antiviral drugs are essential in our fight against viral diseases, but most of them are virus-specific ...

Academic Press Inc Elsevier Science2023

Cryogenic electron tomography to determine thermodynamic quantities for nanoparticle dispersions

Francesco Stellacci, Davide Demurtas, Quy Ong Khac, Xufeng Xu, Francesca Olgiati, Ting Mao, Paulo Henrique Jacob Silva, Anna Murello

Here we present a method to extract thermodynamic quantities for nanoparticle dispersions in solvents. The method is based on the study of tomograms obtained from cryogenic electron tomography (cryoET). The approach is demonstrated for gold nanoparticles ( ...

2022

Experimental Method to Distinguish between a Solution and a Suspension

Francesco Stellacci, Quy Ong Khac, Xufeng Xu, Ting Mao, Paulo Henrique Jacob Silva

Dispersion of objects in a fluid phase can be classified as solutions (Gibbs free energy of mixing, Delta G(mix) < 0) or suspensions (Delta G(mix) > 0) depending on their thermodynamic stability. Small objects tend to form solutions, larger ones suspension ...

WILEY2022

Monovalent ion-mediated charge-charge interactions drive aggregation of surface-functionalized gold nanoparticles

Francesco Stellacci, Quy Ong Khac, Francesca Olgiati, Ting Mao

Monolayer-protected metal nanoparticles (NPs) are not only promising materials with a wide range of potential industrial and biological applications, but they are also a powerful tool to investigate the behaviour of matter at nanoscopic scales, including t ...

ROYAL SOC CHEMISTRY2022

In-situ Investigations on Gold Nanoparticles Stabilization Mechanisms in Biological Environments Containing HSA

Francesco Stellacci, Quy Ong Khac, Antonia Neels, Marianne Liebi

Nanoparticles (NPs) developments advance innovative biomedical applications. However, complex interactions and the low colloidal stability of NPs in biological media restrict their widespread utilization. The influence of NPs properties on the colloidal st ...

WILEY-V C H VERLAG GMBH2021