Given below are two statements Statement... | Agricultural Physics

ICAR JRF Agricultural Physics 29 Jun 2024Shift 1

Statement Based +4 −1

Given below are two statements

Statement (I) : Bottom-up nanofabrication implies making increasingly small structures by progressively removing matter

Statement (II) : Top-down nanofabrication implies building new nano-objects by rearranging atoms or molecules

In light of the above statements, choose the most appropriate answer from the options given below.

Statement (|) is true but Statement (Il) is false Both Statement (I) and Statement (II) are false. Correct Statement (I) is false but Statement ({I) is true Both Statement (I) and Statement (II) are true

Statement (I) is False: Bottom-up nanofabrication builds nanomaterials from the atomic or molecular scale upward via chemical synthesis and self-assembly; progressively removing bulk material is the definition of top-down nanofabrication (e.g., lithography, etching).
Statement (II) is False: Top-down nanofabrication carves nanoscale patterns from macroscopic substrates; building nano-objects atom-by-atom or molecule-by-molecule defines bottom-up fabrication.
Conclusion: Both Statement (I) and Statement (II) are false (Option 2).

Correct option: (2) Both Statement (I) and Statement (II) are false.

Explanation not matching this question? क्या व्याख्या इस प्रश्न से मेल नहीं खा रही? Report

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