公开(公告)号：US12084772B1

公开(公告)日：2024-09-10

申请号：US17247061

申请日：2020-11-25

Applicant: Iowa State University Research Foundation, Inc.

Inventor： Jonathan Claussen ,  Suprem Das

IPC: C23C16/56 ,  B41J2/01 ,  B41J2/14 ,  C23C18/14 ,  H05K1/00

CPC classification number: C23C16/56 ,  B41J2/01 ,  B41J2/14104 ,  C23C18/14 ,  H05K1/00

Abstract: An apparatus, method, and system for post-processing a printed graphene ink pattern or other deposition on a substrate. A pulsed UV laser is tunable between various energy densities to selectively modify the printed ink or deposition in electrical or physical properties. In one example, radical improvements in electrical conductivity are achieved. In another example, controlled transformation from essentially 2D printed or deposited graphene to surface topology of 3D nanostructures are achieved. The 3D structures are beneficial in such applications as electrochemical sensors of different types and characteristics. In another example, hydrophobicity of the printed or deposited graphene can be manipulated starting from a hydrophilic to super hydrophobic surface.

公开(公告)号：US20210215636A1

公开(公告)日：2021-07-15

申请号：US17248211

申请日：2021-01-14

Applicant: Iowa State University Research Foundation, Inc. ,  Northwestern University

Inventor： Jonathan Claussen ,  Kshama Parate ,  Mark C. Hersam ,  Sonal V. Rangnekar

IPC: G01N27/414 ,  B41M3/00 ,  B41M5/00 ,  B41M7/00 ,  B33Y10/00 ,  B33Y40/20 ,  B33Y80/00 ,  B29C64/112 ,  G01N33/543

Abstract: Methods and systems of fabrication of high resolution, high-throughput electrochemical sensing circuits on a substrate. High resolution electrochemical sensing circuits are printed by an effective additive technique to the substrate. Optionally, post-print annealing converts electrochemically inactive printed graphene into one that is electrochemically active. The printing can be by aerosol jet printing, but is not necessarily limited thereto. An example is inkjet printing and then the post-print annealing. Ink formulation would be adjusted for effectiveness with inkjet printing. Optionally biorecognition agents can be covalently bonded to the printed graphene for the purpose of electrochemical biosensing. High throughput fabrication of high-resolution graphene circuits (feature sizes in the tens of microns

公开(公告)号：US11536721B2

公开(公告)日：2022-12-27

申请号：US16495739

申请日：2018-03-26

Applicant: IOWA STATE UNIVERSITY RESEARCH FOUNDATION, INC. ,  Brigham Young University

Inventor： Jonathan Claussen ,  Suprem Das ,  Brian D. Iverson

IPC: G01N33/543 ,  G01N27/327 ,  G01N27/30

Abstract: In a general aspect, an apparatus can include a first carbon nanotube array that is patterned to define a first electrode having a first plurality of electrode segments. The apparatus can also include a second carbon nanotube array that is patterned to define a second electrode having a second plurality of electrode segments. The second plurality of electrode segments can be interdigitated with the first plurality of electrode segments. The apparatus can further include a biorecognition agent disposed on a surface of the first electrode and disposed on a surface of the second electrode. The first plurality of electrode segments can each have a height-to-width aspect ratio of at least 1 to 1.

公开(公告)号：US11971383B1

公开(公告)日：2024-04-30

申请号：US16602691

申请日：2019-11-20

Applicant: Iowa State University Research Foundation, Inc.

Inventor： Jonathan Claussen ,  John Hondred

IPC: G01N27/30 ,  C23C16/02 ,  C23F1/02 ,  G01N27/327 ,  H01G11/26 ,  H01G11/36 ,  H01G11/44 ,  H01G11/86 ,  B05D3/02 ,  B05D3/06 ,  B05D3/10 ,  B05D5/02

CPC classification number: G01N27/308 ,  C23C16/0263 ,  C23F1/02 ,  G01N27/3271 ,  H01G11/26 ,  H01G11/36 ,  H01G11/44 ,  H01G11/86 ,  B05D3/0254 ,  B05D3/065 ,  B05D3/107 ,  B05D5/02

Abstract: The invention relates to a method of patterning a substrate with graphene-based or other electroactive-material-based solution that includes solid-phase particles as hard templates, reducing the solution, and processing the reduced solution to expose the particles. The exposed hard template particles are removed to leave a three-dimensional (3D) porous architecture that can be beneficially used for a variety of applications, including but not limited to bio sensors and supercapacitors. In one example, the exposure is by etching with a CO2 laser. The method can be practiced with scalable MEMS fabrication technologies.

公开(公告)号：US20200025753A1

公开(公告)日：2020-01-23

申请号：US16495739

申请日：2018-03-26

Applicant: IOWA STATE UNIVERSITY RESEARCH FOUNDATION, INC. ,  Brigham Young University

Inventor： Jonathan Claussen ,  Suprem Das ,  Brian D. Iverson

IPC: G01N33/543 ,  G01N27/327 ,  G01N27/30

Abstract: In a general aspect, an apparatus can include a first carbon nanotube array that is patterned to define a first electrode having a first plurality of electrode segments. The apparatus can also include a second carbon nanotube array that is patterned to define a second electrode having a second plurality of electrode segments. The second plurality of electrode segments can be interdigitated with the first plurality of electrode segments. The apparatus can further include a biorecognition agent disposed on a surface of the first electrode and disposed on a surface of the second electrode. The first plurality of electrode segments can each have a height-to-width aspect ratio of at least 1 to 1.

公开(公告)号：US20230079919A1

公开(公告)日：2023-03-16

申请号：US17931228

申请日：2022-09-12

Applicant: Iowa State University Research Foundation, Inc.

Inventor： Jonathan Claussen ,  Bolin Chen ,  Carmen L. Gomes

IPC: B23K26/364 ,  H01G11/86 ,  B01L3/00 ,  B23K26/351 ,  B23K26/0622

Abstract: Apparatus, systems, and methods for tuning the structure, conductivity, and/or wettability of laser induced graphene for a variety of functions including but not limited to multiplexed open microfluidic environmental biosensing and energy storage devices. Aspects of this invention introduce a one-step, mask-free process to create, pattern, and tune laser-induced graphene (LIG) with a ubiquitous CO2 laser or other laser. The laser parameters are adjusted to create LIG with different electrical conductivity, surface morphology, and surface wettability without the need for post chemical modification. This can be done with a single lasing. By optionally introducing a second (or third, fourth, or more) lasing(s), the LIG characteristics can be changed in just the same one step of using the laser scribing without other machines or sub-systems. One example is a second lasing with the same laser sub-system at low laser power, wherein the wettability of the LIG can be significantly altered. Such films presented unique superhydrophobicity owing to the combination of the micro/nanotextured structure and the removal of the hydrophilic oxygen-containing functional groups. The ability to tune the wettability of LIG while retaining high electrical conductivity and mechanical robustness allows rational design of LIG based on application.

公开(公告)号：US20210332489A1

公开(公告)日：2021-10-28

申请号：US17302229

申请日：2021-04-27

Applicant: Iowa State University Research Foundation, Inc.

Inventor： Jonathan Claussen ,  Carmen L. Gomes ,  Raquel Rainier Alves Soares ,  Robert Hjort ,  Cicero Cardoso Pola

IPC: C25B11/043 ,  G01N27/30 ,  C01B32/205 ,  C01B32/184

Abstract: Apparatus and methods of fabrication and use of highly effective laser-induced graphene (LIG) electrodes including for electrochemical sensing and catalysis. One example is a sensitive and label-free laser-induced graphene (LIG) electrode functionalized for a specific application. One example of functionalization with antibodies, an enzyme, or an ionophore to electrochemically quantify a target species The LIG electrodes were produced by laser induction on film having a carbon precursor (e.g. polyimide) in ambient conditions, and hence circumvent the need for high-temperature, vacuum environment, and metal seed catalysts commonly associated with graphene-based electrodes fabricated via chemical vapor deposition processes. These results demonstrate how LIG-based electrodes can be used for electrochemical sensing in general. Other examples of applications include, but are not limited to, ion-sensing, pesticide monitoring and detection, and water splitting, using the LIG-based electrode(s) adapted for those purposes.