Hexagonal Nano-Crystalline BCN Films Grown on Si (100) Substrate Studied by X-Ray Absorption Spectroscopy

Abstract

<p align="justify"> <span><span style="font-family:Verdana;">Hexagonal nano-crystalline boron carbonitride (</span><i><span style="font-family:Verdana;">h-</span></i><span style="font-family:Verdana;">BCN) films grown on Si (100) substrate have been precisely investi</span></span><span style="font-family:Verdana;">gated. The films were synthesized by radio frequency plasma enhanced chemical vapor deposition using tris-dime</span><span style="font-family:Verdana;">thylamino borane as a single-source molecular precursor. The deposition was performed by setting RF power at 400</span><span style="font-family:Verdana;"> - </span><span style="font-family:Verdana;">800 W. The reaction pressure was at 2.6 Pa and the substrate temperature was recorded at 700°</span><span><span style="font-family:Verdana;">C</span></span><span style="font-family:Verdana;"> - </span><span style="font-family:Verdana;">800°</span><span><span><span style="font-family:Verdana;">C. Formation of the nano-crystalline </span><i><span style="font-family:Verdana;">h-</span></i><span style="font-family:Verdana;">BCN compound has been confirmed by X-ray diffraction analysis. The diffraction peaks at 26.3°</span></span><span style="font-family:Verdana;"> together with a small unknown peak at 29.2°</span><span><span style="font-family:Verdana;"> were elucidated due to the formation of an </span><i><span style="font-family:Verdana;">h-</span></i><span style="font-family:Verdana;">BCN structure. The films composed of B, C, and N atoms with different B-N, B-C, C-N chemical bonds in forming the </span><i><span style="font-family:Verdana;">sp</span>^{<span style="font-family:Verdana;">2</span>}</i><span style="font-family:Verdana;">-BCN atomic con</span></span></span><span><span style="font-family:Verdana;">figuration studied by X-ray photoelectron spectroscopy. Orientation and local structures of the </span><i><span style="font-family:Verdana;">h-</span></i><span style="font-family:Verdana;">BCN hybrid were studied by near-edge X-ray absorption fine structure (NEXAFS) measurements. The dominant presence of </span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;">p</span></span><span style="font-family:Verdana;">* and </span><span style="font-family:Verdana;"><span style="font-family:Verdana;">s</span></span><span><span style="font-family:Verdana;">* resonance peaks of the </span><i><span style="font-family:Verdana;">sp</span></i>^{<span style="font-family:Verdana;">2</span>}<span style="font-family:Verdana;">-hybrid orbitals in the B </span><i><span style="font-family:Verdana;">K</span></i><span style="font-family:Verdana;">-edge NEXAFS spectra revealed the formation of the </span><i><span style="font-family:Verdana;">sp</span></i>^{<span style="font-family:Verdana;">2</span>}<span style="font-family:Verdana;">-BCN configuration around B atoms like-BN</span>_{<span style="font-family:Verdana;">3</span>}<span style="font-family:Verdana;"> in </span><i><span style="font-family:Verdana;">h-</span></i><s...

Atomically Sharp Interface in an h-BN-epitaxial graphene van der Waals Heterostructure

“…No evidence of C-B bond at 283. 2 eV 26 27 or C-N and C-O bonds expected at higher BE, 286.5 eV 28 and 286.2 eV 29 , respectively, were present in the spectra. These observations confirm that there were no covalent bonds formed between graphene and h-BN, nor graphene contamination.…”

Chemical Vapor Deposition of Highly Conjugated, Transparent Boron Carbon Nitride Thin Films

“…[1] Of note, the peak usually attributed to B─O bonds, lying in the range 192-192.6 eV, is not present, confirming that despite the high oxophilicity of boron, this CVD method creates B─C and B─N bonds in a conjugated structure at comparably low temperatures. [2,18,21,22] This is further confirmed by the deconvolution of the O 1s (Figure S5, Supporting Information) which shows a single peak at 530 eV, and attributed to CO 2 or H 2 O, where B─O bonds would occur at around 533 eV. [22] The high homogeneity and flatness achieved for the BCN thin films allow for applications in optics as transparent and highly refractive coatings.…”

“…[20] Moreover, the B 1s spectrum shows two components centered at 189.2 and 190.2-190.5 eV attributed to sp 2 B─C─N and B─N environments, due to the lower electronegativity of carbon with respect to nitrogen (Figure 2c,f). [1,21] The deconvoluted peaks lie in the typical range of sp 2 conjugated boron. [22] Overall XPS data confirm the presence to highly conjugated ternary BCN materials and are in good agreement with the EELS analysis.…”

Preparation of ZnO/MWCNT/PP composite film and its application as multifunctional protective film

“…According to Tang et al addition of ZnO nanoparticles to PP does not affect crystal structure of α form of PP crystal . Peak at 2 θ 26.8 (002), is because of the presence of MWCNTs which is characteristic of graphite like structure . Peaks at 2 θ 32.1, 34.4, 36.3 correspond to the planes (100), (002), and (101) planes of hexagonal wurtzite crystal of ZnO .…”