Synthesis and assembly of colloidal cuboids with tunable shape biaxiality

Yang, Yang; Chen, Guangdong; Thanneeru, Srinivas; He, Jie; Liu, Kun; Nie, Zhihong

doi:10.1038/s41467-018-06975-8

Cited by 27 publications

(21 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After equilibrating the sample overnight, a characteristic nematic texture was seen ( Fig. 3 D, Inset) (37,38). No focal conical defect or oily streak defect, typical defects for smectic or cholesteric phase, was observed.…”

Section: Significancementioning

confidence: 98%

Iridescence in nematics: Photonic liquid crystals of nanoplates in absence of long-range periodicity

Zeng

King

Huang

et al. 2019

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

Photonic materials with positionally ordered structure can interact strongly with light to produce brilliant structural colors. Here, we found that the nonperiodic nematic liquid crystals of nanoplates can also display structural color with only significant orientational order. Owing to the loose stacking of the nematic nanodiscs, such colloidal dispersion is able to reflect a broad-spectrum wavelength, of which the reflection color can be further enhanced by adding carbon nanoparticles to reduce background scattering. Upon the addition of electrolytes, such vivid colors of nematic dispersion can be fine-tuned via electrostatic forces. Furthermore, we took advantage of the fluidity of the nematic structure to create a variety of colorful arts. It was expected that the concept of implanting nematic features in photonic structure of lyotropic nanoparticles may open opportunities for developing advanced photonic materials for display, sensing, and art applications.

show abstract

Section: Significancementioning

confidence: 98%

Iridescence in nematics: Photonic liquid crystals of nanoplates in absence of long-range periodicity

Zeng

King

Huang

et al. 2019

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

show abstract

“…Preparation of net-poly(MA-11-2-11-MA)-co-(MA-11-RhB) capsules Silica microrods and microboards were synthesized according to previous reports (39,40). Silica microspheres were commercially purchased.…”

Section: Synthesis Of Pyr-eo 4 -Nmentioning

confidence: 99%

Two-dimensional polymers with versatile functionalities via gemini monomers

Yang

Gao

et al. 2019

Sci. Adv.

Self Cite

View full text Add to dashboard Cite

Two-dimensional synthetic polymers (2DSPs) are sheet-like macromolecules consisting of covalently linked repeat units in two directions. Access to 2DSPs with controlled size and shape and diverse functionality has been limited because of the need for monomers to retain their crystallinity throughout polymerization. Here, we describe a synthetic strategy for 2DSPs that obviates the need for crystallinity, via the free radical copolymerization of amphiphilic gemini monomers and their monomeric derivatives arranged in a bilayer at solid-liquid interfaces. The ease of this strategy allowed the preparation of 2DSPs with well-controlled size and shape and diverse functionality on solid templates composed of various materials with wide-ranging surface curvatures and dimensions. The resulting 2DSPs showed remarkable mechanical strength and have multiple applications, such as nanolithographic resist and antibacterial agent. The broad scope of this approach markedly expands the chemistry, morphology, and functionality of 2DSPs accessible for practical applications.

show abstract

“…The study of entropically-driven phase transitions in liquid crystals has been an active field of research from the pioneering work of Onsager 1 , having a major boost in the 80's and 90's [2][3][4][5][6][7] and continuing as a very active topic of research up to the present [8][9][10][11][12][13][14][15][16][17][18] . These works theoretically and experimentally showed that liquid-crystalline uniform phases, such as uniaxial or biaxial nematics (N), and non-uniform phases such as smectic and columnar phases, can be stabilized solely by extremely shortranged repulsive particle interactions.…”

Section: Introductionmentioning

confidence: 99%

Orientational ordering in a fluid of hard kites: A density-functional-theory study

Martı́nez-Ratón

Velasco

2020

Phys. Rev. E

View full text Add to dashboard Cite

Using Density Functional Theory we theoretically study the orientational properties of uniform phases of hard kites -two isosceles triangles joined by their common base. Two approximations are used: Scaled Particle Theory, and a new approach which better approximates third virial coefficients of two-dimensional hard particles. By varying some of their geometrical parameters kites can be transformed into squares, rhombuses, triangles, and also very elongated particles, even reaching the hard-needle limit. Thus a fluid of hard kites, depending on the particle shape, can stabilize isotropic, nematic, tetratic and triatic phases. Different phase diagrams are calculated, including those of rhombuses, and kites with two of their equal interior angles fixed to 90 • , 60 • and 75 • . Kites with one of their unequal angles fixed to 72 • , which have been recently studied via Monte Carlo simulations, are also considered. We find that rhombuses and kites with two equal right angles and not too large anisometry stabilise the tetratic phase but the latter stabilize it to a much higher degree. By contrast, kites with two equal interior angles fixed to 60 • stabilize the triatic phase to some extent, although it is very sensitive to changes in particle geometry. Kites with the two equal interior angles fixed to 75 • have a phase diagram with both tetratic and triatic phases, but we show the nonexistence of a particle shape for which both phases are stable at different densities. Finally the success of the new theory in the description of orientational order in kites is shown by comparing with Monte Carlo simulations for the case where one of the unequal angles is fixed to 72 • . These particles also present a phase diagram with stable tetratic and triatic phases.

show abstract

Synthesis and assembly of colloidal cuboids with tunable shape biaxiality

Cited by 27 publications

References 41 publications

Iridescence in nematics: Photonic liquid crystals of nanoplates in absence of long-range periodicity

Iridescence in nematics: Photonic liquid crystals of nanoplates in absence of long-range periodicity

Two-dimensional polymers with versatile functionalities via gemini monomers

Orientational ordering in a fluid of hard kites: A density-functional-theory study

Contact Info

Product

Resources

About