Disable Core in ESP32 using platformio

Dear community,

In order to save power, I would like to turn off one of the cores of my esp32 device. How could i do that using platformio? Please, if there is any file that i should change, could you please provide me the path for such file?

I currently have the following configurations in my platforio.ini:

[env:esp32dev]
platform = espressif32
board = esp32dev
framework = arduino
monitor_speed = 115200
monitor_port = COM8
upload_port = COM8
board_build.partitions = min_spiffs.csv

Thank you very much,

Rodrigo