Surface functionalization of cubic boron nitride films for biological sensing applications

Abstract

Surface functionalization and modification scheme of cubic boron nitride (cBN) films deposited by chemical vapor deposition was demonstrated. A homogeneous layer of amino groups was bonded covalently on the B and/or N atoms of cBN surface via a photochemical reaction with allylamine. X-ray photoelectron spectroscopy was carried out to verify comprehensively each stage of the surface modification process. Gold nanoparticles (AuNPs) were self-assembled on the amine-terminated cBN surface, and a dense and well-distributed AuNPs monolayer was obtained. Modification of amine-terminated cBN films with amine-modified DNA probes presents an example of applications as DNA biosensors.

Surface-Enhanced Raman Scattering of 4-Aminothiophenol Adsorbed on Silver Nanosheets Deposited onto Cubic Boron Nitride Films

“…Amineterminated active cBN/Si(001) surface was obtained by the photochemical reaction between hydrogen-terminated cBN/Si(001) surface and allylamine. 17 A layer of AuNP was self-assembled on the amine-terminated cBN/Si(001) surface. A dense and well-distributed AuNP monolayer was formed.…”

“…[15][16][17] The cBN/Si(001) films were modified with AgNS in three steps. Firstly, a 20-μL volume of allylamine was placed onto the cBN/Si(001) (A = 1 cm 2 ) surface in a N2-purged Teflon reaction chamber covered with a quartz window and the material was irradiated with a UV lamp (254 nm) for 12 h. Secondly, the sample was immersed into the gold colloid solution (pH 4.0) for 24 h, rinsed with deionized water.…”

“…Recently, we firstly reported that an cBN/Si(001) surface could be functionalized by a photochemical reaction to form an amine-terminated surface. 17 Subsequently, a gold nanoparticles (AuNP) monolayer was self-assembled on the amine-terminated surface, and a dense and well-distributed AuNP monolayer was obtained. It has been reported that the AuNP could initiate the silver deposition in a silver enhancer solution in the presence of reductant, ultimately resulting in the formation of silver nanostructures by an electroless process.…”

Bias-Enhanced Formation of Metastable and Multiphase Boron Nitride Coating in Microwave Plasma Chemical Vapor Deposition

“…These data show that the BN coating grown without applied bias consists primarily of the sp 2 bonded hexagonal BN phase. In contrast, the BN coating grown with applied bias shows two additional peaks at 1045 and 1224 cm −1 , corresponding to the Restrahlen band of c -BN and the TO modes of w -BN, respectively [ 35 , 37 , 38 ]. These observations clearly suggest that applied biasing introduces sp 3 bonded cubic and wurtzite phases of BN.…”

Combined Vibrational Spectroscopic and Theoretical Study on Nature ofc-BN Powders Surface

“…Only few related topics are highlighted, e.g . properties of H-terminated − and amino-functionalized c -BN. It is also established that a thin film of boron oxide is formed on the surface of the c -BN upon heating to 1473 K .…”