Borophene as a Bio-Lubricant Additive: IASST Guwahati Breakthrough

Science & Technology · Thursday, 23 July 2026

Scientists at the Institute of Advanced Study in Science and Technology (IASST), Guwahati, achieved a breakthrough by using borophene as a bio-lubricant additive in castor oil. Borophene is an ultra-thin two-dimensional crystalline allotrope of boron, often called the boron equivalent of graphene.

Quick highlights

IASST Guwahati used borophene as a bio-lubricant additive in castor oil.
Borophene is a single-atom-thick 2D crystalline allotrope of boron, the boron equivalent of graphene.
Unlike graphene, it does not exist naturally in bulk and must be synthesised via CVD or Molecular Beam Epitaxy under ultra-high vacuum.
Metallic substrates such as silver, gold or copper supply electrons that stabilise its planar 2D arrangement.
It is anisotropic, mechanically strong, flexible, and a fully metallic conductor unlike bulk boron, which is a semiconductor.
Applications: bio-based lubricants, next-generation batteries, supercapacitors and hydrogen storage.

Context

Scientists at the Institute of Advanced Study in Science and Technology (IASST), Guwahati, achieved a breakthrough by using borophene as a bio-lubricant additive in castor oil, an application relevant to industrial machinery and marine transport.

Key Facts

Borophene is an ultra-thin, two-dimensional crystalline allotrope of boron consisting of a single-atom-thick layer of boron atoms, often referred to as the boron equivalent of graphene, with exceptional mechanical strength, flexibility and electronic conductivity. Unlike graphene, which can be mechanically exfoliated from bulk graphite, borophene does not exist naturally in bulk form and must be synthesised artificially through Chemical Vapour Deposition (CVD) or Molecular Beam Epitaxy (MBE) under ultra-high vacuum, by evaporating pure boron gas onto hot, highly clean metallic substrates such as silver, gold or copper. The metallic substrate provides the electrons needed to stabilise the planar 2D arrangement, forming a metallic sheet with mixed covalent and electron-deficient bonding networks.

Significance

Key features include anisotropic physical properties, meaning direction-dependent mechanical, thermal and electrical behaviour due to its asymmetric atomic lattice; ultra-high tensile strength and high Young's modulus with flexibility superior to graphene along specific crystallographic axes; high thermal conductivity and fully metallic conduction unlike semiconducting bulk boron; superior tribological and load-bearing capacity through durable protective tribofilms formed during mechanical shear that reduce surface roughness, friction and wear; and high chemical reactivity from its electron-deficient nature, enabling uniform dispersion in organic fluids such as vegetable or castor oil without chemical surface modification. Applications span bio-based lubricants that cut friction and energy consumption in industrial machinery and marine transport, and next-generation batteries, supercapacitors and hydrogen storage systems owing to high capacity and fast ion transport.

Challenges / Way Forward

Because borophene cannot be exfoliated from a bulk source and requires ultra-high vacuum synthesis on clean metallic substrates, scaling production for commercial lubricant or energy-storage use is the principal hurdle. Its high chemical reactivity aids dispersion in oils but also raises stability questions, so progress depends on scalable synthesis routes and durability testing under real operating conditions.

Exam Angle

Prelims: borophene as a 2D allotrope of boron, CVD and MBE synthesis routes, contrast with graphene, anisotropy, metallic versus semiconducting behaviour, IASST Guwahati as the research institute. Mains GS-3: nanotechnology, indigenous R&D, energy efficiency and green lubricants.

Remember this

Borophene is a single-atom-thick 2D allotrope of boron — the boron equivalent of graphene.
IASST Guwahati used it as a bio-lubricant additive in castor oil.
It does not occur in bulk form and is synthesised by CVD or Molecular Beam Epitaxy under ultra-high vacuum.
Substrates used: silver, gold or copper, which supply stabilising electrons.
Bulk boron is a semiconductor, but borophene is a fully metallic conductor.
It shows anisotropic mechanical, thermal and electrical properties.
It forms protective tribofilms that reduce friction and wear.
Potential uses: batteries, supercapacitors and hydrogen storage.

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