Large-scale mechanical peeling of boron nitride nanosheets by low-energy ball milling

Li, Lu Hua; Chen, Ying; Behan, G.; Zhang, Hongzhou; Petravić, M.; Glushenkov, Alexey M.

doi:10.1039/c1jm11192b

Cited by 389 publications

(273 citation statements)

References 39 publications

Supporting

Mentioning

268

Contrasting

Order By: Relevance

“…The effects of shear and compression action of the milling spheres are visible on several akes, with BN stacks shied over each other, showing folds not only on the surface of the platelets, due to the shear force of balls impacting on the top surface of the particle, but also inside the platelets due to the compression force of milling balls colliding with the edge of the particles. 23 …”

Section: View Article Onlinementioning

confidence: 99%

Fragmentation and exfoliation of 2-dimensional materials: a statistical approach

et al. 2014

View full text Add to dashboard Cite

The main advantage for applications of graphene and related 2D materials is that they can be produced on large scales by liquid phase exfoliation. The exfoliation process shall be considered as a particular fragmentation process, where the 2D character of the exfoliated objects will influence significantly fragmentation dynamics as compared to standard materials. Here, we used automatized image processing of Atomic Force Microscopy (AFM) data to measure, one by one, the exact shape and size of thousands of nanosheets obtained by exfoliation of an important 2D-material, boron nitride, and used different statistical functions to model the asymmetric distribution of nanosheet sizes typically obtained.Being the resolution of AFM much larger than the average sheet size, analysis could be performed directly at the nanoscale and at the single sheet level. We find that the size distribution of the sheets at a given time follows a log-normal distribution, indicating that the exfoliation process has a "typical" scale length that changes with time and that exfoliation proceeds through the formation of a distribution of random cracks that follow Poisson statistics. The validity of this model implies that the size distribution does not depend on the different preparation methods used, but is a common feature in the exfoliation of this material and thus probably for other 2D materials.The huge scientic and technological interest for graphene has triggered in the last few years the development of a wide range of techniques to produce and process nanosheets that, having nanometric thickness and mesoscopic lateral size, shall be considered as quasi 2-dimensional (2D) objects. Besides their novel properties, even the way these 2D sheets are produced in solution, by exfoliation, 1 is an original process, still not completely understood.The exfoliation of a 2D object from a 3D bulk material is a process spanning from the nano-to meso-scale due to bubble cavitation, intercalation and disruptive fragmentation, as we described in recent work. 2 Exfoliation always yields a polydispersed range of nanosheet thickness and lateral size. When characterizing these 2D sheet solutions, their average size and size standard deviation are commonly reported, oen assuming that their size follows a "Gaussian" (a.k.a. "normal") distribution. Conversely, the experimental data show that the size distribution of these materials is highly asymmetric and nonGaussian.It is noteworthy that this asymmetry in size distribution shall be observed in very different systems such as the distribution of chemical elements in rocks, the species abundance in biology, the lengths of latent periods of infectious diseases in medicine, and the distribution of galaxies in astronomy (Fig. 1). 3,4 A better modelling of the size distribution of 2D materials is needed both from a fundamental point of view (to understand the exfoliation mechanism) and from a technological point of view (to improve the metrology of 2D materials for applications and quality control).Here, we ...

show abstract

Section: View Article Onlinementioning

confidence: 99%

Fragmentation and exfoliation of 2-dimensional materials: a statistical approach

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Shear force is one of the effective mechanical forces that lead to material exfoliation, but impacting force is more effective in material breakage because it tends to accentuate the tendency for the residual cracks in the material to propagate. Typically, under the shear force, preferential cleavage happens mainly along the weak inter-plane bonds so that the thin GO nanosheets were able to be mechanically peeled off from the graphite oxide particles [60]. The shear force can cleave graphite oxide from their outer surface [61] (Figure 11(a)), while the impacting force peels off thin GO nanosheets from the edge of graphite oxide [62] (Figure 11(b)).…”

Section: Exfoliation Mechanismmentioning

confidence: 99%

Facile and size-controllable preparation of graphene oxide nanosheets using high shear method and ultrasonic method

Cai

Sang

Shen

et al. 2017

Journal of Experimental Nanoscience

View full text Add to dashboard Cite

The lateral size of the graphene oxide (GO) nanosheets could be controlled by preparation method, and a simple and effective strategy to adjust the lateral size of GO nanosheets by selecting suitable method is presented. The high shear method was introduced to produce GO nanosheets, and the GO nanosheets (few micrometres) prepared by high shear method is about one order of magnitude larger than GO nanosheets (few hundred nanometres) obtained by ultrasonic method, as evidenced by atomic force microscopy. The FTIR, XPS and Raman analysis revealed that there are no distinct differences in composition and functional groups between the GO nanosheets produced by high shear method and ultrasonic method. The cavitation in the procedure of ultrasonic method is favourable for GO exfoliation, but it also could result in damage to GO nanosheets. The shearing force in the process of high shear method is effective for GO delamination with minimal fragmentation. The results indicated that the high shear method proposed in this paper is an efficient exfoliation means to produce single-layer GO nanosheets.

show abstract

“…These interactions contribute to a metastable energy minimum by decreasing the number of dangling bonds at the edges or tips and energetically stabilise the multilayer form [56,57]. Nanosheets of BN can be obtained via gentle shear forces using a mild wet-ball milling of bulk BN powder in a milling agent such as benzyl benzoate under N 2 atmosphere [58]. These nanosheets have a high density of defects [59].…”

Section: Boron Nitridementioning

confidence: 99%

Transition Metal Dichalcogenides and Other Layered Materials

Jana¹,

Rao²

2017

2D Inorganic Materials Beyond Graphene

View full text Add to dashboard Cite

Abstract. The importance of two-dimensional (2D) materials needs to be recognised in a big way due to the discovery of graphene. It is noteworthy that research on 2D inorganic layered materials in the last few years has shown that these materials are equally fascinating, exhibiting several novel properties and phenomena. Especially, noteworthy is the variety of fascinating properties of single and few layers of MoS2 and related dichalcogenides. WTe2 exhibits the largest magnetoresistance recorded in materials. Then there are topological insulators such as Bi2Se3. Besides chalcogenides, there are materials such as boron nitrides and Borocarbonitrides with several interesting features. This chapter presents a brief review of the various 2D materials of interest today.

show abstract

Large-scale mechanical peeling of boron nitride nanosheets by low-energy ball milling

Cited by 389 publications

References 39 publications

Fragmentation and exfoliation of 2-dimensional materials: a statistical approach

Fragmentation and exfoliation of 2-dimensional materials: a statistical approach

Facile and size-controllable preparation of graphene oxide nanosheets using high shear method and ultrasonic method

Transition Metal Dichalcogenides and Other Layered Materials

Contact Info

Product

Resources

About