Mask-less preparation of Janus particles through ultraviolet irradiation on hydrophobic particles assembled at the air-water interface

Tan, Jasmine Si Jia

doi:10.1016/j.jcis.2019.03.081

Cited by 10 publications

(19 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Unlike OTES, the low surface energy of 14.3 mJ m −2 of a FAS‐functionalized surface made it repellant to both oil and water. Such particles have a tendency to assemble at the oil/water interface . We found that FAS‐functionalized particles formed wax droplets as well: SEM images revealed spherical wax droplets with diameters of ≈28.3 µm when 2% w/w FAS‐TiO 2 was used, in a similar size range as wax droplets stabilized by OTES‐TiO 2 .…”

Section: Resultsmentioning

confidence: 70%

“…Janus modification of the particles proceeds through partial removal of the surface silanes on silane‐functionalized TiO 2 . The photocatalytic reactions occurring on a TiO 2 surface subjected to UV irradiation has been extensively reported, and the degradation of surface silanes on TiO 2 induced by UV irradiation has been demonstrated . The mechanism of this process is detailed (Figure ).…”

Section: Resultsmentioning

confidence: 98%

“…Aside from OTES‐ and FAS‐functionalized TiO 2 ‐based particles, the ability of various prefunctionalized particles to form Pickering emulsions is of great interest for future work. Although the work here only explored TiO 2 ‐based particles, it is envisioned that other photocatalytic particles can be employed . This can lead to a larger range of Janus particles with different particle‐coating combinations.…”

Section: Discussionmentioning

confidence: 99%

“…Functionalization of particles with FAS and OTES were carried out as previously reported . The TiO 2 particles were dispersed in absolute methanol to make a 2 g L −1 dispersion through sonication at 37 kHz (Elmasonic S30H, Elma) and stirring.…”

Section: Methodsmentioning

confidence: 99%

“…In this report, a method to obtain Janus titanium dioxide (TiO 2 ) particles containing contrasting wettability over their surface is described. The ability of TiO 2 to photocatalytically degrade organics coated on its surface under ultraviolet (UV) light irradiation has been employed . Adapting the paraffin wax template from Hong et al, silane‐functionalized particles based on TiO 2 were partially embedded in the wax surface to create wax‐in‐water Pickering emulsions.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Preparation of Janus Titanium Dioxide Particles via Ultraviolet Irradiation of Pickering Emulsions

Tan

Wong

Chen

2020

Adv Materials Inter

Self Cite

View full text Add to dashboard Cite

Pickering emulsions are stabilized by solid particles assembled at an immiscible liquid–liquid interface. In this work, the use of such emulsions to prepare semiconductor Janus particles through UV‐irradiation is explored. Titanium dioxide particles that are prefunctionalized with an alkylsilane or a fluoroalkylsilane are employed to obtain wax‐in‐water emulsion droplets, which consist of the particles partially embedded in the wax core. Different emulsion formation mechanisms are discussed. The emulsified wax droplets are then subjected to ultraviolet irradiation, which photocatalytically degrades the silanes on the exposed portion of the particle surfaces, leading to Janus particles containing partial silane coatings. The particles are finally recovered through dissolution of wax. The Janus particles, which have contrasting wettabilities over their surface, are characterized based on self‐assembly behavior and bulk wetting performance in a compact film, as compared with nonfunctionalized and fully‐functionalized homogeneous particles. Three different types of Janus particles are created and their characters are explained using the concept of the Janus balance. The method has the potential to produce large scale yields in a relatively short time, and can be potentially applied to other semiconductor particles for the generation of Janus particles.

show abstract

Section: Resultsmentioning

confidence: 70%

Section: Resultsmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Preparation of Janus Titanium Dioxide Particles via Ultraviolet Irradiation of Pickering Emulsions

Tan

Wong

Chen

2020

Adv Materials Inter

Self Cite

View full text Add to dashboard Cite

show abstract

Recent advancements in Janus nanoparticle-based biosensing platforms

2022

View full text Add to dashboard Cite

Nanoparticles have aided in the development of nano-based sensors for diagnostic applications. However, use of nanoparticles in the development of sensing devices for multiple analyte detection is constrained due to their inability to detect several analytes with a single type of nanoparticle. The term “Janus particle” refers to micro or nanoscale particles that have been divided into sections or compartments, each of which has a distinct set of chemical or physical properties, producing multifunctional particles endowed with distinctive qualities. Furthermore, Janus particles have the ability to perform multiple functions within a single particle at the same time, with no interference from adjacent sections. This review focuses on the use of Janus particles in the fabrication of biosensors as well as in the investigation of various properties endowed by these Janus particles for their use as biosensors. It also discusses the various types of Janus particle-based biosensors that are currently available. Finally, the limitations of Janus particles in sensor technologies and their future scope have been discussed. Graphical abstract

show abstract

Janus-like particles prepared through partial UV irradiation at the water/oil interface and their encapsulation capabilities

Tan

Cao

Huang

et al. 2020

Colloids and Surfaces A: Physicochemical and Engineering Aspect

View full text Add to dashboard Cite

Mask-less preparation of Janus particles through ultraviolet irradiation on hydrophobic particles assembled at the air-water interface

Cited by 10 publications

References 38 publications

Preparation of Janus Titanium Dioxide Particles via Ultraviolet Irradiation of Pickering Emulsions

Preparation of Janus Titanium Dioxide Particles via Ultraviolet Irradiation of Pickering Emulsions

Recent advancements in Janus nanoparticle-based biosensing platforms

Janus-like particles prepared through partial UV irradiation at the water/oil interface and their encapsulation capabilities

Contact Info

Product

Resources

About