The top-down approach is a process of miniaturizing or breaking down bulk materials (macro-crystalline) structures while retaining the original integrity. The bottom-up approach involves building of nanomaterials from the atomic scale (assembling materials from atoms/molecules).
Top-down approaches are good for producing structures with long-range order and for making macroscopic connections, while bottom-up approaches are best suited for assembly and establishing short-range order at nanoscale dimensions.
Nanofabrication is a way of making devices, systems, and components on a nanoscale. The bottom-up approach has a better chance of producing nanostructures that have fewer defects than they would with the top-down method, as well as having a more homogenous chemical composition and better short- and long-range ordering.
A bottom-up approach helps improve employee collaboration as everyone will be involved in the decision-making process and have input into how things are done. Communication will be two-way, and employees will feel empowered to share new ideas with their managers.
Which of the following is an example of Bottom Up approach? Explanation: Colloidal dispersion is an example of bottom up approach in the synthesis of Nano particles. Attrition, milling and etching are typical top down methods.
What is the advantage of top-down approach?
The advantage of this approach is that decisions can be made and implemented very quickly. This is particularly important when time is limited. The other benefit of top-down project planning is that it helps align the project goals with the organization’s strategic goals as upper management is giving the directions.
What is the difference between synthesis and fabrication?
As verbs the difference between fabricate and synthesize
is that fabricate is to form into a whole by uniting its parts; to frame; to construct; to build; as, to fabricate a bridge or ship while synthesize is to combine two or more things to produce a new, more complex product.
What are the disadvantages of top-down approach?
Disadvantages of the top-down approach include:
- Low participation (this is likely to influence the implementation of the plans in a negative way).
- Requires a lot of knowledge at the top level.
- Does not use specialized knowledge which may be present in the lower echelons of the organization.
Disadvantages of the bottom-up approach include:
- Complexity (making a decision with just a few people is more simple).
- Time-consuming (making a decision with just a few people will typically be faster).