Search

EP-4735382-A1 - FUNCTIONALIZING CARBON NANOSTRUCTURES

EP4735382A1EP 4735382 A1EP4735382 A1EP 4735382A1EP-4735382-A1

Abstract

A method for producing a film of functionalized carbon nanostructures is disclosed. The method comprises: - providing an electrode comprising a film of carbon nanostructures attached to a support, - subjecting the electrode to an electrografting process in a bath containing water and at least one diazonium compound, - conducting the electrografting process using potential pulses, wherein each potential pulse consists of an ON- time, wherein potential is applied for 0.01 – 0.1 s and an OFF-time, wherein zero potential is applied for 0.01 – 0.1 s, to form anchoring sites on the surfaces of the carbon nanostructures. Further is disclosed a film of functionalized carbon nanostructures. Further is disclosed the use of the film or the method for forming a sensor, a filter, an electron stopping window, and/or a pellicle.

Inventors

  • SOLIMAN, AHMED

Assignees

  • Canatu Finland Oy

Dates

Publication Date
20260506
Application Date
20240618

Claims (20)

  1. 1. A method for producing a film of functionalized carbon nanostructures attached to a support, wherein the method comprises: - providing an electrode comprising a film of carbon nanostructures attached to a support, - subjecting the electrode to an electrografting process in a bath containing water and at least one diazonium compound, - conducting the electrografting process using potential pulses, wherein each potential pulse consists of an ON-time, wherein potential is applied for 0.01 - 0.1 s, and an OFF-time, wherein zero potential is applied for 0.01 - 0.1 s, to form anchoring sites on the surfaces of the carbon nanostructures.
  2. 2. The method of claim 1, wherein each anchoring site is formed of the diazonium compound covalently bonded to the outer lateral surface of the carbon nanostructure .
  3. 3. The method of claim 1, wherein the at least one diazonium compound is 1, 10-phenanthrolin-5-amine, 6-amino-2-naphthoic acid, or 4 ' -amino- [ 1 , 1 ' -biphenyl ] - 4-carboxylic acid hydrochloride.
  4. 4. The method of any one of the preceding claims, wherein concentration of the diazonium compound in the bath is 0.1 - 100 mMol, or 1 - 90 mMol, or 3 - 80 mMo 1 , or 5 - 70 mMo 1, or 10 - 60 mMo 1, or 15 - 50 mMo 1, or 20 - 40 mMo 1.
  5. 5. The method of any one of the preceding claims, the bath further contains sulphuric acid and/or sodium nitride.
  6. 6. The method of any one of the preceding claims, wherein the applied potential is -800 mV to - 600 mV, or -600 mV to -300 mV, or -300 Mv to -50 mV.
  7. 7. The method of any one of the preceding claims, wherein potential is applied for 0.02 - 0.09 s, or 0.03 - 0.08 s, or 0.04 - 0.07 s, per each ON-time.
  8. 8. The method of any one of the preceding claims, wherein zero potential is applied for 0.02 - 0.09 s, or 0.03 - 0.08 s, or 0.04 - 0.07 s per each OFF- time .
  9. 9. The method of any one of the preceding claims, wherein the film of carbon nanostructures has the size of 0.1 - 1000 cm 2 , or 1 - 500 cm 2 , or 5 - 350 cm 2 , or 10 - 200 cm 2 , or 50 - 150 cm 2 .
  10. 10. The method of any one of the preceding claims, wherein the film of carbon nanostructures is a free-standing film or a supported film.
  11. 11. The method of any one of the preceding claims, wherein support has the form of a frame, and the film of carbon nanostructures is a free-standing film of carbon nanostructures attached to the frame.
  12. 12. The method of any one of the preceding claims, wherein the method further comprises forming a coating on the film of carbon nanostructures through the formed anchoring sites on the surfaces of the carbon nanostructures .
  13. 13. The method of claim 11, wherein the coating is formed by an atomic layer deposition (ALD) type of process .
  14. 14. A film of functionalized carbon nanostructures attached to a support, wherein the carbon nanostructures comprise anchoring sites on the surfaces of the carbon nanostructures, wherein each anchoring site is formed of a diazonium compound covalently bonded to the outer lateral surface of the carbon nanostructure .
  15. 15. The film of functionalized carbon nanostructures attached to a support of claim 14, wherein the diazonium compound is 1, 10-phenanthrolin-5- amine, 6-amino-2-naphthoic acid, or 4 ' -amino- [ 1 , 1 ' -biphenyl ] -4-carboxylic acid hydrochloride.
  16. 16. The film of functionalized carbon nanostructures attached to a support of any one of claims 14 - 15, wherein the film of functionalized carbon nanostructures has the size of 0.1 - 1000 cm 2 , or 1 - 500 cm 2 , 5 - 350 cm 2 , or 10 - 200 cm 2 , or 50 - 150 cm 2 .
  17. 17. The film of functionalized carbon nanostructures attached to a support of any one of claims 14 - 16, wherein the film of functionalized carbon nanostructures is a free-standing film or a supported film.
  18. 18. The film of functionalized carbon nanostructures attached to a support of any one of claims 14 - 15, wherein support has the form of a frame, and the film of functionalized carbon nanostructures is a free-standing film of functionalized carbon nanostructures attached to the frame.
  19. 19. The film of functionalized carbon nanostructures attached to a support of any one of claims 14 - 18, wherein a coating is formed on the film of functionalized carbon nanostructures through the anchoring sites on the surfaces of the carbon nanostructures .
  20. 20. Use of the method of any one of claims 1 - 13 for forming a sensor, a filter, an electron stopping window, and/or a pellicle.

Description

FUNCTIONALIZING CARBON NANOSTRUCTURES FIELD OF THE INVENTION The present disclosure relates to a method for producing a film of functionali zed carbon nanostructures attached to a support . The present disclosure further relates to a film of functionali zed carbon nanostructures attached to a support . The present disclosure further relates to the use of the film of functionali zed carbon nanostructures attached to a support for forming a sensor, a filter, an electron stopping window, and/or a pellicle . The present disclosure further relates to the use of the method as diclosed in the current specification for forming a sensor, a filter, an electron stopping window, and/or a pellicle . BACKGROUND OF THE INVENTION Carbon nanostructures have desirable properties such as high surface area and good thermal and electrical conductivity . However, due to their inert nature , the surfaces of the carbon nanostructures may need to be functionali zed in order to be suitable for further applications . SUMMARY OF THE INVENTION A method for producing a film of functionali zed carbon nanostructures attached to a support is disclosed . The method comprises : - providing an electrode comprising a film of carbon nanostructures attached to a support , - subj ecting the electrode to an electrografting process in a bath containing water and at least one diazonium compound, - conducting the electrografting process using potential pulses , wherein each potential pulse consists of an ON-time , wherein potential is applied for 0 . 01 - 0 . 1 s , and an OFF-time , wherein zero potential is appl ied for 0 . 01 - 0 . 1 s , to form anchoring sites on the surfaces of the carbon nanostructures . Further is disclosed a film of functionali zed carbon nanostructures attached to a support , wherein the carbon nanostructures comprise anchoring sites on the surfaces of the carbon nanostructures , wherein each anchoring site is formed of a diazonium compound covalently bonded to the outer lateral surface of the carbon nanostructure . Further is disclosed the use of the film of functionali zed carbon nanostructures attached to a support as diclosed in the current specification for forming a sensor, a filter, an electron stopping window, and/or a pellicle . Further is disclosed the use of the method as diclosed in the current specification for forming a sensor, a filter, an electron stopping window, and/or a pellicle . BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings , which are included to provide a further understanding of the invention and constitute a part of this specification, illustrate embodiments of the invention and together with the description help to explain the principles of the invention . In the drawings : Fig . 1 illustrates an FT IR spectrum of a f ilm of functionali zed carbon nanostructures according to one embodiment and an FTIR spectrum of a reference sample as described in example 1 . DETAILED DESCRIPTION A method for producing a film of functionali zed carbon nanostructures attached to a support is disclosed . The method comprises : - providing an electrode comprising a film of carbon nanostructures attached to a support , - subj ecting the electrode to an electrografting process in a bath containing water and at least one diazonium compound, - conducting the electrografting process using potential pulses , wherein each potential pulse consists of an ON-time , wherein potential is applied for 0 . 01 - 0 . 1 s , and an OFF-time , wherein zero potential is appl ied for 0 . 01 - 0 . 1 s , to form anchoring sites on the surfaces of the carbon nanostructures . Further is disclosed a film of functionali zed carbon nanostructures attached to a support , wherein the carbon nanostructures comprise anchoring sites on the surfaces of the carbon nanostructures , wherein each anchoring site is formed of a diazonium compound covalently bonded to the outer lateral surface of the carbon nanostructure . Further is disclosed the use of the film of functionali zed carbon nanostructures attached to a support as diclosed in the current specification for forming a sensor, a filter, an electron stopping window, and/or a pellicle . The film of functionali zed carbon nanostructures attached to a support as diclosed in the current specification may be used as a sensor, a filter, an electron stopping window, and/or a pellicle . Further is disclosed the use of the method as diclosed in the current specification for forming a sensor, a filter, an electron stopping window, and/or a pellicle . In one embodiment , the sensor is an electrochemical sensor, a biosensor, or any combination thereof . In one embodiment , the filter is an optical filter, a debris filter, a membrane filter, or any combination thereof . Thus , the filter may at the same time function as e . g . an optical filter and a debris filter . Thus, in one embodiment, the filter is an optical filter and a debris filter. In one embodiment, the filter is an optical filter