Oriented Deposition of HARM-Structures via Laminar Gas Flow
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Solution Overview
Problem
Existing methods for depositing high aspect ratio molecular structures (HARM-structures) lack efficient means for oriented deposition, which is crucial for harnessing their unique electrical, optical, thermal, and mechanical properties.
Innovation Solution
The apparatus comprises a deposition chamber with a filter and a control system that maintains a laminar gas flow of HARM-structures parallel to the filter, facilitating oriented deposition. The control system regulates gas flow rates and maintains a Reynolds number between 10 and 3500 to ensure laminarity and efficient deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional deposition methods are used, then HARM-structures can be deposited, but the deposition lacks orientation control and uniformity
Solution Approach 1:
The apparatus integrates multiple functions into a single system: the deposition chamber serves as both the reaction space and the flow control environment, while the filter assembly simultaneously performs filtration and oriented deposition. The gas flow system provides both transport and orientation control, eliminating the need for separate orientation control mechanisms.
Solution Approach 2:
The invention uses gas flow as the primary mechanism to achieve oriented deposition. By controlling the laminar flow of gas through the deposition chamber and across the filter, the HARM-structures are carried and oriented in the direction of gas flow, enabling precise deposition orientation without mechanical manipulation.
2Productivity
If gas flow rate is increased to improve deposition speed, then productivity increases, but laminar flow condition may be lost reducing deposition quality
Solution Approach 1:
The invention optimizes the gas flow rate parameter to maintain laminar flow conditions (Reynolds number below critical value) while achieving acceptable deposition speeds. The system identifies and operates within the optimal parameter range where both productivity and precision are satisfied, rather than maximizing only one parameter.
Solution Approach 2:
The control system monitors deposition conditions and adjusts gas flow rate to maintain laminar flow conditions. By providing feedback on flow conditions and deposition quality, the system can dynamically optimize the gas flow rate to prevent transition to turbulent flow while maintaining high productivity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables uniform and oriented deposition of HARM-structures on the filter, with the structures becoming oriented in the same direction as the gas flow, thereby enhancing the utilization of their unique properties.
Implementation Method 1
The control system and the relative positions of the inlet, the outlet, the top cover, the bottom cover and the filter are arranged to maintain a laminar gas flow of the gas comprising HARM-structures in proximity to the deposition area of the filter
Implementation Method 2
a force, such as drag force, electrostatic force, inertial force, photophoretic force, thermophoretic force or acoustic force, is applied upon an aerosol or a gas comprising HARM-structures
Implementation Method 3
The filter comprises a deposition area. The deposition area refers to an area on the filter where deposition may take place in certain conditions
Data Source
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AI summary
Apparatuses and a method for gas phase deposition of high aspect ratio molecular structures, HARM-structures, are presented. The first aspect relates to an apparatus configured for oriented gas phase deposition of HARM-structures on a filter. The second aspect relates to an apparatus configured for oriented gas phase deposition of HARM-structures on a substrate. A system comprising multiple apparatuses according to the second aspect is also presented. Elements of the apparatuses are arranged to create a laminar flow of gas comprising HARM- structures in the deposition area, and to direct this flow at least partially parallel to the deposition area. Another aspect of the invention is a method for oriented deposition of HARM-structures, suitable for deposition both on a filter and a substrate.