If you cannot afford the book, write to the author’s former department or the publisher. Many academic publishers offer free PDFs to students from underprivileged backgrounds upon request.
The final chapters touch on , introducing quantum dots, quantum wells, and the concept of surface-to-volume ratio. Pillai explains how the density of states changes from continuous in 3D to staircase-like in 2D (quantum wells) to discrete in 0D (quantum dots). This section, though brief, serves as a springboard for students entering the rapidly growing field of nanotechnology.
