Fabrication and electromagnetic properties of soft-core functional particles by way of electroless Ni–Fe–P alloy plating on helical microorganism cells

Zhang

et al. 2018

Adv Funct Materials

Self Cite

Microorganisms are widely used as the biotemplates for producing micro/ nanomaterials owing to their unique features, such as exquisite morphology, renewable, and environmentally friendly. However, mass intracellular synthesis of uniformly dispersed nanoparticles (NPs) inside microorganisms is still challenging, especially in a predictable and controllable manner. Here, a facile and efficiency strategy is proposed to controllably produce highly dispersed and surfactant-free Pd@Ag core-shell NPs within the Spirulina platensis (Sp.) cells. In this approach, the Sp. cells' permeability is enhanced by the hydrochloric acid treatment first, which enables the Pd NPs penetrate the cell envelope and distribute uniformly inside the cells, and then they can work as the catalytic seeds for the following electroless silver deposition, resulting in the intracellular fabrication of Pd@Ag core-shell NPs with no agglomeration. The Pd@Ag NPs show excellent catalytic activity (turnover frequency is up to 2893 h −1 for the 6.32 nm Pd@Ag NPs), good stability, and recyclability toward the 4-nitrophenol reductions. The excellent properties are attributed to the asymmetrical core-shell structure, small size, and good dispersion of Pd@Ag NPs. Due to its facility, cost-effectiveness, and versatility, this method can be expanded to other microorganisms, so it opens tremendous opportunities for various metallic nanoparticles intracellular synthesis as well as the practical application.

Section: Methodsmentioning

confidence: 99%

Facile Fabrication of Highly Dispersed Pd@Ag Core–Shell Nanoparticles Embedded in Spirulina platensis by Electroless Deposition and Their Catalytic Properties

Zhang

et al. 2018

Adv Funct Materials

Self Cite

“…In our previous researches, flaky porous microparticles coated with magnetic materials (e.g., Co-Ni-P, Ni-Fe-P) were prepared using Coscinodiscus diatomite as templates via electroless plating. [93,109] These electromagnetic microdisks exhibited superior microwaveabsorption properties, since the wheel-shaped structure was desired for enhancing electromagnetic susceptibility, and the porous substructure could also benefit scattering effect of electromagnetic wave. [94] Moreover, the microorganism biotemplates can also be removed via acid/alkaline-based chemical etching, and further calcination after the surface coating can be conducted to obtain microparticles with porous/hollow features.…”

Section: Microbial Extracellular Formingmentioning

confidence: 99%

Micro/Nanofabrication, Assembly, and Actuation Based on Microorganisms: Recent Advances and Perspectives

Gong

Li³

et al. 2023

Small Structures

Self Cite

Microorganisms become new sources for fabricating intricate micro/nano structures via bottom‐up approaches. Produced from nature, microorganism biotemplates exhibit unique structural and material features over thousands of years of revolution. They are considerably superior and cost‐effective for fabricating complex and heterogeneous structures when compared to other micro/nanofabrication techniques. Herein, the recent advances in biologically driven micro/nanofabrication, assembly, and actuation based on microorganisms are consolidated. Detailed development and recent advances of micro/nanoparticle fabrication, their ordered assembly, and controlled actuation properties, as well as certain typical engineering application examples, are mainly involved. The developing perspectives and challenges of microorganism‐based micro/nanofabrication are also discussed, aiming to inspire the relevant researches and promote the development in this field.

“…It offers flexibility in the choice of the substrate to be metallized and is almost independent of its chemical composition, state (solid/liquid/gas), and morphology including gas nano-bubbles, emulsified droplets, biological micro-organisms, microfluidic channels, nanoparticles, and plastics. 54–59…”

Section: Introductionmentioning

confidence: 99%

“…27,[51][52][53][54][55][56] It offers exibility in the choice of the substrate to be metallized and is almost independent of its chemical composition, state (solid/liquid/gas), and morphology including gas nano-bubbles, emulsied droplets, biological micro-organisms, microuidic channels, nanoparticles, and plastics. [54][55][56][57][58][59] In view of this, preparation of Ni@TiO 2 photocatalysts was herein accomplished using the in-house developed electroless Ni plating bath and the effect of Ni loading percentage on the photocatalytic hydrogen generation performance has been studied. To the best of our knowledge, preparation of Ni@TiO 2 heterogeneous photocatalyst system using electroless method has not been reported.…”

Section: Introductionmentioning

confidence: 99%

Electroless Ni plated nanostructured TiO₂ as a photocatalyst for solar hydrogen production

Birla,

Arbuj,

Shinde

et al. 2023

RSC Adv.