Organogel comprising an organic solvent and a peptide having the general formula Z- a - b -Z' c, wherein Z is an N-terminal protecting group, wherein said N-terminal protecting group has the general formula -C -R, wherein R is selected from the group consisting of alkyl; X is, at each occurrence, independently selected from the group consisting of aliphatic amino acids, wherein all or a portion of said aliphatic amino acids are arranged in an order of decreasing amino acid size in the direction from N- to C-terminus, wherein the size of the aliphatic amino acids is defined as I = L > V > A > G; Y is selected from the group consisting of polar amino acids, and aromatic amino acids; Z' is a C-terminal protecting group; a is an integer selected from 1 to 6, preferably 1 to 5; b is 1 or 2, preferably 1; and c is 0 or 1, wherein a - b has a sequence selected from the group consisting of LIVAGC (SEQ ID NO: 10), LIVAGD (SEQ ID NO: 11), LIVAGF (SEQ ID NO: 12), LIVAGW (SEQ ID NO: 13), ILVAGD (SEQ ID NO: 14), LIVAAD (SEQ ID NO: 15), LAVAGD (SEQ ID NO: 16), AIVAGD (SEQ ID NO: 17), LIVAGE (SEQ ID NO: 18), LIVAGK (SEQ ID NO: 19), LIVAGS (SEQ ID NO: 20), ILVAGS (SEQ ID NO: 21), AIVAGS (SEQ ID NO: 22), LIVAGT (SEQ ID NO: 23), AIVAGT (SEQ ID NO: 24), LIVAD (SEQ ID NO: 25), LIVGD (SEQ ID NO: 26), IVAD (SEQ ID NO: 27), IIID (SEQ ID NO: 28), IIIK (SEQ ID NO: 29), IVD (SEQ ID NO: 30), IVF (SEQ ID NO: 31), IVW (SEQ ID NO: 32), IID (SEQ ID NO: 33), LVE (SEQ ID NO: 34), IVE (SEQ ID NO: 35), LVD (SEQ ID NO: 36), VIE (SEQ ID NO: 37), VID (SEQ ID NO: 38), VLD (SEQ ID NO: 39), VLE (SEQ ID NO: 40), LLE (SEQ ID NO: 41), LLD (SEQ ID NO: 42), IIE (SEQ ID NO: 43), ID (SEQ ID NO: 44), IE (SEQ ID NO: 45), IW (SEQ ID NO: 46), IF (SEQ ID NO: 47) and IY (SEQ ID NO: 48). Z is an N-terminal protecting group, wherein said N-terminal protecting group has the general formula -C -R, wherein R is selected from the group consisting of alkyl; wherein said N-terminal protecting group has the general formula -C -R, wherein R is selected from the group consisting of alkyl; X is, at each occurrence, independently selected from the group consisting of aliphatic amino acids, wherein all or a portion of said aliphatic amino acids are arranged in an order of decreasing amino acid size in the direction from N- to C-terminus, wherein the size of the aliphatic amino acids is defined as I = L > V > A > G; Y is selected from the group consisting of polar amino acids, and aromatic amino acids; Z' is a C-terminal protecting group; a is an integer selected from 1 to 6, preferably 1 to 5; b is 1 or 2, preferably 1; and c is 0 or 1, wherein a - b has a sequence selected from the group consisting of LIVAGC (SEQ ID NO: 10), LIVAGD (SEQ ID NO: 11), LIVAGF (SEQ ID NO: 12), LIVAGW (SEQ ID NO: 13), ILVAGD (SEQ ID NO: 14), LIVAAD (SEQ ID NO: 15), LAVAGD (SEQ ID NO: 16), AIVAGD (SEQ ID NO: 17), LIVAGE (SEQ ID NO: 18), LIVAGK (SEQ ID NO: 19), LIVAGS (SEQ ID NO: 20), ILVAGS (SEQ ID NO: 21), AIVAGS (SEQ ID NO: 22), LIVAGT (SEQ ID NO: 23), AIVAGT (SEQ ID NO: 24), LIVAD (SEQ ID NO: 25), LIVGD (SEQ ID NO: 26), IVAD (SEQ ID NO: 27), IIID (SEQ ID NO: 28), IIIK (SEQ ID NO: 29), IVD (SEQ ID NO: 30), IVF (SEQ ID NO: 31), IVW (SEQ ID NO: 32), IID (SEQ ID NO: 33), LVE (SEQ ID NO: 34), IVE (SEQ ID NO: 35), LVD (SEQ ID NO: 36), VIE (SEQ ID NO: 37), VID (SEQ ID NO: 38), VLD (SEQ ID NO: 39), VLE (SEQ ID NO: 40), LLE (SEQ ID NO: 41), LLD (SEQ ID NO: 42), IIE (SEQ ID NO: 43), ID (SEQ ID NO: 44), IE (SEQ ID NO: 45), IW (SEQ ID NO: 46), IF (SEQ ID NO: 47) and IY (SEQ ID NO: 48).