Calculated elastic constants C₁₁ and C₁₂ (N m⁻¹), 2D Young's modulus Y_2D (N m⁻¹), 2D shear modulus G_2D (N m⁻¹), and Poisson's ratio ν of the surface-functionalizated BP.

	C 11	C 12	C 2D	G 2D	ν
BP	146.285	38.753	136.019	53.766	0.265
Cl–BP–Cl	104.858	18.373	101.639	43.243	0.175
Cl–BP–Br	102.896	19.457	99.216	41.719	0.189
Br–BP–Cl	101.503	26.531	94.568	37.486	0.261
Br–BP–Br	103.361	23.472	98.030	39.944	0.227