Functionalized nanomembrane, a method for preparation thereof and their use
The present invention discloses functionalized nanomembranes, a method for preparation and their use. The functionalized nanomembrane comprises a) a first layer comprising a nanomaterial, b) a second layer comprising a biorepulsive material, the second layer being attached to at least one side of the first layer, and c) affinity groups, attached to the second layer.
1. Functionalized nanomembrane, comprising
a) a first layer consisting of a nanomaterial, selected from a carbon nanomembrane and a film of amorphous carbon,
b) a second layer comprising a biorepulsive material, the second layer being attached to at least one side of the first layer, and
c) affinity groups, attached to the second layer,
wherein one or more chemical bonds between respective functional groups of the nanomaterial, the biorepulsive material, and the affinity groups are comprised in a functionalized nanomembrane,
wherein the biorepulsive material substantially forms an outer surface of the second layer, wherein said outer surface of the second layer forms an interface between the first layer and the second layer and the second layer substantially consists of the biorepulsive material;
wherein the carbon nanomembrane has a thickness in a range of 0.5-4 nm; and
wherein when the functionalized nanomembrane is a functionalized carbon nanomembrane, the functionalized carbon nanomembrane has a thickness in a range of 3-25 nm.
2. Functionalized nanomembrane according to claim 1 , wherein the biorepulsive material consists of polyglycerol (PG), polyethyleneglycol (PEG), oligoethyleneglycol (OEG), peptides, proteins, oligo-carbohydrates, or (zwitter-)ionic polymers.
3. Functionalized nanomembrane according to claim 1 , wherein the affinity group is one species selected from a specific recognition pair.
4. Method for preparing a functionalized nanomembrane according to claim 1 , comprising the steps
a) providing a first layer comprising a nanomaterial,
b) functionalization of the first layer with a biorepulsive material for obtaining a second layer comprising the biorepulsive material, and
c) functionalization of the second layer with affinity groups.
5. Method according to claim 4 , wherein the first layer, consisting of the nanomaterial, is a nanomaterial supported on a TEM grid.
6. A method of structural analysis of biomolecules, comprising using the functionalized nanomembrane, according to claim 1 , as support film in transmission electron microscopy (TEM).
7. The method of structural analysis, comprising using the functionalized nanomembrane according to claim 6 , wherein the functionalized nanomembrane is supported on a TEM grid.
8. Functionalized nanomembrane according to claim 1 , wherein the functionalized carbon nanomembrane has a thickness in a range of 3-10 nm.
9. Functionalized nanomembrane according to claim 1 , wherein the biorepulsive material consists of polyglycerol (PG), polyethyleneglycol (PEG), oligoethyleneglycol (OEG), peptides, proteins, oligo-carbohydrates, or (zwitter-)ionic polymers.
10. Functionalized nanomembrane according to claim 1 , wherein the affinity group is one species selected from a specific recognition pair.
11. Functionalized nanomembrane according to claim 1 , wherein the affinity group is one species selected from a specific recognition pair comprising chelate complexes/oligo-His, biotin/(strept)avidin, or specific DNA/RNA sense/antisense pairs.
12. Functionalized nanomembrane according to claim 10 , wherein the specific recognition pair comprises chelate complexes/oligo-His, biotin/(strept)avidin, or specific DNA/RNA sense/antisense pairs.