A functionalized set of carbon atoms in the sp 2 hybridization state, said set of carbon atoms in the sp 2 hybridization state being in contact with: - a plurality of compounds of the following formula: (R-L 1 -W) n -V-L 2 -X-Y, wherein: n is equal to 1, 2, or 3, in particular 3; V represents, for all n, -C 3-n - or: - when n is equal to 2, -C =, C being in this case linked to L 2 by a double bond; - when n is equal to 1, -C=, C being in this case linked to L 2 by a triple bond; R is an aromatic hydrocarbon comprising from 2 to 6 condensed aromatic rings; L 1 is a C 1 -C 12 alkanediyl group; W represents a single bond, an arenediyl group, a heteroarenediyl group or a -O-Ar 1 - group wherein Ar 1 is an arene or a heteroarene; L 2 is a group of the following formula -(L 2a) i -(L 2b) j- wherein: i and j are independently of each other selected from 0 and 1, with i + j = 1 or 2; L 2a is a C 1 -C 12 alkanediyl, C 2 -C 12 alkenediyl or C 2 -C 12 alkynediyl group; L 2b is an arenediyl group, a heteroarenediyl group or a -O- Ar 2 - group where Ar 2 is an arene or a heteroarene; X is -C(=O)N-, -C(=O)O- or -C(=O)S- group; Y is an antibacterial antibody or a lectin; and - a plurality of compounds of the following formula: (R-L 1 -W) n -V-L 2 -X-Z, wherein: R, L 1, W, V, L 2 and X are as defined above; Z is an antibacterial peptide. - a plurality of compounds of the following formula: (R-L 1 -W) n -V-L 2 -X-Y, wherein: n is equal to 1, 2, or 3, in particular 3; V represents, for all n, -C 3-n - or: n is equal to 1, 2, or 3, in particular 3; V represents, for all n, -C 3-n - or: - when n is equal to 2, -C =, C being in this case linked to L 2 by a double bond; - when n is equal to 1, -C=, C being in this case linked to L 2 by a triple bond; R is an aromatic hydrocarbon comprising from 2 to 6 condensed aromatic rings; L 1 is a C 1 -C 12 alkanediyl group; W represents a single bond, an arenediyl group, a heteroarenediyl group or a -O-Ar 1 - group wherein Ar 1 is an arene or a heteroarene; L 2 is a group of the following formula -(L 2a) i -(L 2b) j- wherein: i and j are independently of each other selected from 0 and 1, with i + j = 1 or 2; L 2a is a C 1 -C 12 alkanediyl, C 2 -C 12 alkenediyl or C 2 -C 12 alkynediyl group; L 2b is an arenediyl group, a heteroarenediyl group or a -O- Ar 2 - group where Ar 2 is an arene or a heteroarene; X is -C(=O)N-, -C(=O)O- or -C(=O)S- group; Y is an antibacterial antibody or a lectin; and R is an aromatic hydrocarbon comprising from 2 to 6 condensed aromatic rings; L 1 is a C 1 -C 12 alkanediyl group; W represents a single bond, an arenediyl group, a heteroarenediyl group or a -O-Ar 1 - group wherein Ar 1 is an arene or a heteroarene; L 2 is a group of the following formula -(L 2a) i -(L 2b) j- wherein: i and j are independently of each other selected from 0 and 1, with i + j = 1 or 2; L 2a is a C 1 -C 12 alkanediyl, C 2 -C 12 alkenediyl or C 2 -C 12 alkynediyl group; L 2b is an arenediyl group, a heteroarenediyl group or a -O- Ar 2 - group where Ar 2 is an arene or a heteroarene; X is -C(=O)N-, -C(=O)O- or -C(=O)S- group; Y is an antibacterial antibody or a lectin; and i and j are independently of each other selected from 0 and 1, with i + j = 1 or 2; L 2a is a C 1 -C 12 alkanediyl, C 2 -C 12 alkenediyl or C 2 -C 12 alkynediyl group; L 2b is an arenediyl group, a heteroarenediyl group or a -O- Ar 2 - group where Ar 2 is an arene or a heteroarene; X is -C(=O)N-, -C(=O)O- or -C(=O)S- group; Y is an antibacterial antibody or a lectin; and - a plurality of compounds of the following formula: (R-L 1 -W) n -V-L 2 -X-Z, wherein: R, L 1, W, V, L 2 and X are as defined above; Z is an antibacterial peptide. R, L 1, W, V, L 2 and X are as defined above; Z is an antibacterial peptide.