Adsorption of Colloidal Nanoparticles to Supports: Employing Electrostatic Charge Screening and Barrierless Self-Assembly as Nanointegration Strategy.

Surfactant-free nanoparticles can be adsorbed on a support material by electrostatic deposition which requires electrostatic attraction between the nanoparticles and the support material. However, when nanoparticles and support have a similar isoelectric point (IEP), it is difficult to create such electrostatically attractive conditions and trigger the adsorption process by pH adjustment. In this work, we present an alternative approach to support laser-generated metal nanoparticles by controlled precipitation onto thin graphene oxide (GO) nanosheets via a kinetically barrierless process induced by high ionic strength.

Physical Regimes and Mechanisms of Picosecond Laser Fragmentation of Gold Nanoparticles in Water from X-ray Probing and Atomistic Simulations.

Laser fragmentation in liquids has emerged as a promising green chemistry technique for changing the size, shape, structure, and phase composition of colloidal nanoparticles, thus tuning their properties to the needs of practical applications. The advancement of this technique requires a solid understanding of the mechanisms of laser-nanoparticle interactions that lead to the fragmentation. While theoretical studies have made impressive practical and mechanistic predictions, their experimental validation is required.

Increasing cellular fitness and product yields in Pseudomonas putida through an engineered phosphoketolase shunt.

Background: Pseudomonas putida has received increasing interest as a cell factory due to its remarkable features such as fast growth, a versatile and robust metabolism, an extensive genetic toolbox and its high tolerance to oxidative stress and toxic compounds. This interest is driven by the need to improve microbial performance to a level that enables biologically possible processes to become economically feasible, thereby fostering the transition from an oil-based economy to a more sustainable bio-based one. To this end, one of the current strategies is to maximize the product-substrate yield of an aerobic biocatalyst such as P.

Photomechanical Laser Fragmentation of IrO Microparticles for the Synthesis of Active and Redox-Sensitive Colloidal Nanoclusters.

Pulsed laser fragmentation of microparticles (MPs) in liquid is a synthesis method for producing high-purity nanoparticles (NPs) from virtually any material. Compared with laser ablation in liquids (LAL), the use of MPs enables a fully continuous, single-step synthesis of colloidal NPs. Although having been employed in several studies, neither the fragmentation mechanism nor the efficiency or scalability have been described.